Browse Topic: Personnel

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New technologies, advanced materials, evolving mission profiles and fast-changing requirements are forcing the aerospace and defense (A&D) industry to dramatically increase the speed of engineering. Companies must design, validate and bring more complex products to market faster than ever, even as software, electronics and autonomy continue to reshape what aircraft, spacecraft and defense systems can do. At the same time, a growing production challenge is emerging. Workforce shortages, supply chain disruption and pressure to reduce cost and cycle time are converging with new demands for greater volume and flexibility. Defense programs are seeing increasing need for larger quantities of lower-cost systems such as drones, while commercial aerospace companies continue to work through backlogs and reinforce their fleets. To keep pace, the industry must accelerate innovation while also scaling production with greater speed, resilience and adaptability.
Focusing on the requirements engineering activities, this study analyzed the problems in the implementation process of the forward design practice of commercial aircraft airframe, introduced the breakthrough methods, including the convergence and integration with the traditional design process, the supporting work organization model, process optimization, and specification, and proposed the airframe stakeholder need capture model based on the theory of systems engineering. Practice has shown that the requirements engineering implementation strategy introduced in this paper can effectively resolve conflicts and redundancies between the requirements system and the original top-level document system requirements. It ensures clear requirements sources, sufficient basis, reasonable allocation, controllable changes, adequate change assessments, clear design status, and controllable design risks. It effectively overcomes human resource bottlenecks during the early stage of requirements engineering implementation while cultivating talent reserves for systems engineering implementation, saving approximately 23.5 person-years in labor costs. It significantly optimizes non-value-added processes, reducing approximately 100 reports. It unifies the team’s understanding of requirements work, improves coordination efficiency, and significantly improves the requirements validation rate between aircraft-level and system-level requirements by an average of approximately 46%. It assists stakeholders and engineers in systematically and scientifically capturing product requirements during the design phase, with original product design specifications covering approximately 70% of subsystem specifications on average. Given its generality across the airframe forward design domain, the airframe requirement management paradigm established by this implementation strategy holds significant importance for the comprehensive and in-depth application of systems engineering methods in commercial aircraft development.
Sun, LuyanChang, Liang
In the process of replacing the rollers of the fabric cart of the tobacco storage cabinet, in order to solve the problems of low replacement efficiency and high safety risk.This article proposes a specialized lifting tool for fabric cart rollers with a self-locking and adopts the screw lifting structure, which facilitates roller maintenance operations, and conducts SolidWorks Simulation calculations and dynamic simulation methods. Jinan Cigarette Factory fine cigarettes special line leaf silk temporary storage cabinet fabric car roller replacement, for example, the results show that: the average operating personnel reduced by 50%, the replacement time from 6.7h to 1.2h, efficiency increased by 458%, This innovation significantly reduces the labor intensity of maintenance personnel and ensures a safe and reliable replacement process.
Zhang, LeiXue, YifeiZhang, GeSun, YanzhaoWang, HongbinCheng, Linfeng
In light of the significant roll/pitch experienced by traditional shipboard trestles due to wave action during the transfer of maintenance personnel from the operation and maintenance vessel to the offshore wind turbine base, an analysis of ship motion states was conducted under various sea conditions and ship manufacturing parameters. The kinematic capabilities and characteristics of the actuator were defined, and the mapping relationship between the wave compensation capability of the active wave compensation trestle and key design parameters, such as actuator power, was established. Consequently, an active wave compensation trestle executive mechanism was developed, incorporating lightweight research into its design. A prototype of the active wave compensation trestle was constructed and subjected to motion compensation testing. The results indicate that the prototype can effectively maintain stability between the ship and the offshore facility, thereby enhancing the safety of transferring personnel and improving maintenance efficiency.
Sun, TieruiZhao, PengfeiXin, RanQiu, JichengYang, XiaotaoShiyuan, E
This study analyzed the evacuation process of aircraft cabin personnel, with a focus on the impact of emergency exit configuration on evacuation efficiency. The research results indicated that the number and location of emergency exits are key factors determining evacuation time. In the case of only one exit, the evacuation time was significantly longer than that of multiple exit configurations. Utilizing three exits could reduce the evacuation time to 76 seconds. Additionally, the age and gender distribution of passengers, as well as priority rules, also had a significant impact on the evacuation process. The study further demonstrated that the activation of emergency exits and rear cabin doors could significantly enhance evacuation efficiency, while the opening of the front cabin door had a relatively smaller effect.
Wang, KaiWu, BinLi, GuolinYue, ChaoyuZeng, TaiSu, Zhengliang
The reliability of aviation maintenance personnel directly impacts flight safety, yet systematic methodologies for the quantitative prediction of human error probability (HEP) in this domain remain lacking. To address this gap, a novel human factors reliability analysis method for aviation maintenance is proposed, extending the SPAR-H model through Evidential Reasoning (ER). This method is implemented as follows: Maintenance tasks are decomposed into subtasks. Subsequently, the eight types of Performance Shaping Factors (PSFs) for each subtask are evaluated by domain experts according to defined PSF levels. Expert judgments are then aggregated using Evidential Reasoning theory, enabling the calculation of aggregated PSF levels. These aggregated levels are interpolated to determine the corresponding impact multipliers. Finally, the HEP for aviation maintenance operations is calculated by integrating the SPAR-H basic error probability model with task series/parallel logic rules. The proposed methodology is validated using an inspection operation case study. This study establishes a methodological framework for human factors reliability analysis in aviation maintenance, providing a theoretical foundation for developing scientifically grounded prevention and control measures to enhance aviation safety levels.
Meng, MengMa, NingGuan, ZhongqingHan, ZuyangNan, WenxueCai, Hongbin
In order to solve the ship emergencies that may occur in the process of tunnel navigation, the tunnel pontoon-type bank wall evacuation channel proposed in a large navigation building is taken as the research object. Based on Pathfinder evacuation software, a numerical model of pedestrian evacuation for 500 passenger ships in emergency situations such as fire in the navigation tunnel is established, and the evacuation simulation analysis and evacuation ability evaluation are completed. The analysis shows that the emergency evacuation time of personnel is at least about 21 minutes, and the bottleneck of emergency evacuation equipment for personnel in the navigation tunnel is at the entrance of the pontoon escape. The results provide guidance and suggestions for the design optimization of the evacuation channel of the tunnel bank wall in the later period.
Tao, RanLi, RanTang, WeibiHu, ZhifangQin, Pan
Emergency evacuation slides (EVAC slides) are critical safety devices used on aircraft to enable rapid egress during emergencies. While these slides provide a quick and reliable escape route, communication between separated slides during evacuation remains a challenge. Often, during raft deployment over water, slides may drift apart impeding communication among evacuees and rescue personnel potentially compromising safety. Existing aircraft EVAC systems lack integrated wireless communication relying on visual or voice signals that are unreliable in chaotic conditions. This paper explores the integration of wireless IoT technology into EVAC slide systems to facilitate inter-slide communication and monitor critical parameters such as slide air pressure and the floating weight of stranded passengers through embedded sensors. It proposes the adoption of Long Range (LoRa) modulation technology for wireless communication chosen for its low-power, long-range performance and license-free operation in emergency evacuation scenarios. In addition, the usage of this proposed technology can be further extended to locate the aircraft when other existing locating mechanisms fail.
Sengodan, RajkumarTalore, Suresh
While many manufacturers are enjoying demand for their products and have innovations in the pipeline, their growth strategy can sometimes stall. The issue might be due to workforce shortages, which can evolve from temporary setbacks to long-term challenges. For a variety of industries, helping hands are often hard to find, and it’s an issue that’s been consistent in recent years. Given this, many companies are considering transitioning to automation, including through the use of collaborative robots or cobots, for short.
To reduce the carbon emissions during the construction period of metro stations, two structural prefabrication schemes with varying prefabrication rates, based on the top-down construction method, were proposed and analyzed for their ability to study the carbon reduction potential of structural prefabrication construction technology in metro station construction, in comparison to traditional open-cut cast-in-place methods. A BIM model of the envelope and main structure of a metro station under construction in Qingdao was established to analyses the carbon emission impact factors of the metro station in terms of the consumption of materials, personnel, machinery, and transportation of each subcomponent project. The results show that the structural assembly construction technology can greatly reduce the work of support installation and dismantling, formwork installation and dismantling, and reinforced concrete pouring in the enclosure structure. With the prefabrication rate increasing from 16% to 40%, the carbon emission of the metro station construction process can be reduced by 5.58% and 7.46%, respectively.
Gao, GuangyiWang, ZheyongDong, SilongGou, JiayuanLi, YangqingZeng, Tiesen
The outwash flow of a VTOL aircraft in near-ground operation is a serious risk for surrounding objects or personnel, and has been investigated for a long time. The current paper contributes to this topic by revisiting quantitative outwash measurement techniques and evaluation strategies suitable for full-scale flight experiments. An array of purpose-built ultrasonic anemometers, a pitot tube rake, and fiber-film sensors were applied during outwash tests with a hovering Eurocopter EC135, complemented by accompanying numerical simulations with the Vorticity Transport Model (VTM). A focus is set on an analysis of the flow unsteadiness, revealing large fluctuations at low frequencies which require careful data post-processing. The fluctuations limit the application of pitot tubes to measure the mean flow due to their angular sensitivity, and ultrasonic anemometers are recommended as a particularly suitable and convenient measurement method with a sufficient frequency response. Furthermore, the experimental and numerical results are compared to semi-empirical outwash models, and the importance of simultaneous measurements of the ambient wind conditions is demonstrated.
Wolf, Claus ChristianBrown, RichardGardner, Anthony DonaldWeise, Till SilasSchwalbe, JulienBraukmann, Johannes Niklas
PLCs (Programmable Logic Controllers) are critical devices in manufacturing, enabling the functioning of machinery and the transmission of build data to other systems in a production facility. Thus, maintaining uptime of these devices is crucial for ensuring that a facility can keep its line running, as even a few minutes of downtime can cost a company thousands in lost units and revenue. One particular pain point that causes downtime is broken communication between the devices and downstream applications, especially those that track orders and traceability. While advances in computing and digital technology have enabled the quick detection of lost signaling and the quick restoration of communication channels, there is much work left to be done in this realm. Besides causing downtime, an incident disrupts the flow of the line, leading to significant effort to restore normal production flow, even after resolution of the incident. In addition, the outage and the post-incident recovery can require extensive IT and Controls personnel, especially at undesirable times of the day. Overall, restoration of communication has been a reactive procedure, where most effort so far has been spent minimizing impact instead of eliminating it. This paper proposes an architectural framework and presents a reference implementation, plc-remedy, demonstrating automated monitoring and remediation via Common Industrial Protocol (CIP). Performance projections derived from IT automation benchmarks suggest a potential 90% reduction in end-to-end resolution time. Empirical validation with production PLC hardware is identified as essential future work.
Jan, JonathanPreston, Joshua
Understanding the fluid flow behavior over and into narrow gaps is crucial for many industrial applications, particularly in the automotive sector. Evaluating the potential of water ingress into narrow pathways and towards components is of great importance to design the water management of such components. The employment of CFD simulations supports the evaluation of potential water ingress into such gaps. Lagrangian based tools are used in a variety of simulation scenarios of fluid flow, especially due to their ability to easily simulate free surfaces with strong curvatures. In our previous work, a validated simulation setup was developed using the meshless simulation tool MESHFREE from Fraunhofer ITWM [8] for simulating water entering small gaps. Especially for industrial use cases, the computation time of several days is too expensive. Thus, we enhanced this approach to a fast and robust CFD simulation that realizes industrial use cases within appropriate time. The development was conducted in two stages. First, the previously validated simulation method was analyzed with respect to different parameters (e.g. parameters influencing time step sizes) in a simplified benchmark case. This allowed for an initial assessment of their effects on computation time, accuracy, and robustness. Second, the improved parameter configuration was then further optimized for industrial applications to maximize performance across these criteria. The results demonstrate great potential in reducing the computation time. These findings will contribute to improving future work on modeling water pathways inside a vehicle.
Zrnic, DinoKonstantinovics, AthenaKospach, AlexanderRugerri, EvelynLoy, MichaelBäder, DirkMichel, Isabel
Safety isn’t just the absence of accidents - it’s the presence of trust, empowerment, and accountability at every level. The result is a high-trust culture where process becomes practice and safety is a shared achievement. When people closest to the work feel supported to act on what they see, safety becomes the standard. Thus, the deployment of autonomous driving systems (ADSs) requires not only technical rigor but also a resilient organizational safety culture that supports continuous learning, accountability, and transparent communication. This paper examines how safety culture can be operationalized in ADS development and operations by integrating guidance from standards such as UL 4600 and best practices from SAE AVSC. UL 4600’s requirements for systematic hazard analysis, safety case maintenance, and safety performance indicators (SPIs) are used as a foundation for quantifying organizational behavior within a Just Culture framework. This work draws on Human and Organizational Performance (HOP) research, including foundational contributions from Hollnagel, Reason, Dekker, Conklin, and Rasmussen, linking cultural dynamics to workforce involvement and effective safety controls. We propose a taxonomy of seven safety-culture SPIs that trace directly to UL 4600 § 16.2.5 and demonstrate how they can be deployed within an incident-handling process. Each SPI is defined mathematically and mapped to process steps, enabling both leading- and lagging-indicator assessment of safety culture maturity. This proposed framework, which requires formal research validation, transforms SPIs from compliance metrics into qualitative diagnostic tools for trust, empowerment, and system learning. The approach aligns organizational processes with Just Culture principles, distinguishing human error, at-risk behavior, and reckless conduct, while supporting continuous improvement and evidence-based conformance with UL 4600 and related ADS safety standards.
Wagner, MichaelGittleman, Michele
A new system that brings together real-world sensing and virtual reality would make it easier for building maintenance personnel to identify and fix issues in commercial buildings that are in operation. The system was developed by computer scientists at the University of California San Diego and Carnegie Mellon University.
A 4-rotor uninhabited air vehicle is described, with a primary mission of supporting personnel fighting wildfires. The paper demonstrates the use of technical design tools for a small Uninhabited Aircraft System (sUAS). A description of the design process is provided, including developing requirements, identifying constraints, the software tools employed, and examination of results. The vehicle is capable of delivering more than 20 kg of supplies to a delivery point 10 nm away while penetrating 30 kt winds. The sized vehicle is transportable in a medium-duty pickup truck and can be picked up and moved for ground handling by one or two individuals. The vehicle information will be publicly released for NDARC software users. Future work will examine other requirements, such as maneuvering and gust rejection.
Silva, ChristopherSolis, Eduardo
This article describes an enhanced, more efficient way to build and test wire harnesses. The wire harness is a complex, organized bundle of wire found in virtually every motorized vehicle, machinery and equipment. Manual work is usually performed in assembling such harnesses, which is time-consuming and error-prone. Workers usually rely on printed diagrams and basic tools, which can be tiring and tricky to follow, especially when the designs change often. The new system solves many of these issues by combining a smart testing machine called Quad 64 with a large digital display workbench. Instead of looking at paper drawings, workers can now see the full wire layout directly on a screen, life-sized and clear. This makes it easier to understand where each wire goes and what to do next. What’s really helpful is that the system can spot mistakes right away. If a connector is omitted or a wire is placed wrongly, the system will report the error immediately and show it and the remedy. It keeps a shared log of common errors to help inform future guidance and accelerate the learning curve for new team members. This method accelerates labor, minimizes costly errors and breaks down confusion by engaging in a more participatory and visual process. And it makes for a safer, more supportive work environment for employees. And it is better, simpler and smarter than doing it right the first time.
Sancheti, Rahul Madanlal
The article is devoted to a comprehensive analysis of the digital transformation of education using the example of a project to train engineering personnel for the innovative transport industry in Russia. Special attention is paid to the introduction of hybrid formats, digital platforms, inclusivity, issues of digital inequality, as well as the experience of the National Research Center of the Russian Federation FSUE NAMI and interaction with leading universities in the country. A comparative analysis with foreign initiatives, including modern AI solutions for inclusive education, is presented, as well as the impact of the project to create educational and methodological centers on the professional motivation of teachers.
Shishanov, SergeiKurmaev, RinatRevenok, Svetlana
This paper presents Nexifi11D, a simulation-driven, real-time Digital Twin framework that models and demonstrates eleven critical dimensions of a futuristic manufacturing ecosystem. Developed using Unity for 3D simulation, Python for orchestration and AI inference, Prometheus for real-time metric capture, and Grafana for dynamic visualization, the system functions both as a live testbed and a scalable industrial prototype. To handle the complexity of real-world manufacturing data, the current model uses simulation to emulate dynamic shopfloor scenarios; however, it is architected for direct integration with physical assets via industry-standard edge protocols such as MQTT, OPC UA, and RESTful APIs. This enables seamless bi-directional data flow between the factory floor and the digital environment. Nexifi11D implements 3D spatial modeling of multi-type motor flow across machines and conveyors; 4D machine state transitions (idle, processing, waiting, downtime); 5D operational cost breakdowns covering electricity, tooling, labour, coolant, and depreciation; 6D AI/ML-based failure prediction using temperature and pressure inputs; 7D predictive downtime triggers based on learned thresholds; 8D sustainability analytics measuring CO₂ emissions per motor; 9D workforce optimization via virtual shift scheduling and fatigue simulation; 10D supply chain resilience through simulated part delays and buffer modeling; and 11D risk and quality management using defect simulation and risk scoring. All data are generated live and visualized through Grafana dashboards, enabling real-time monitoring of OEE, energy use, defects, and AI-based alerts. Nexifi11D establishes a unified, cyber-physical platform for intelligent, sustainable, and predictive manufacturing, making multidimensional factory optimization practically demonstrable within one connected environment.
Kumar, RahulSingh, Randhir
The U.S. Food and Drug Administration (FDA) has taken a substantial step in its digital modernization strategy with the deployment of agentic artificial intelligence capabilities across all agency employee groups. The move represents an expansion of the agency’s internal AI tools, intended to streamline complex, multi-step processes that support regulatory science, product review, and compliance activities. The deployment strengthens the FDA’s ongoing effort to embed structured, secure, and transparent AI systems into daily workflows, building on the rapid adoption of the LLM-based tool Elsa earlier this year.
Without reliability and signal integrity, aerospace communications risk severe signal degradation and reduced security, posing risks to both personnel and mission-critical data. These challenges are particularly critical for applications that depend on military aircraft, satellite communications, and unmanned aerial vehicles (UAVs). As global demand for real-time data continues to surge, communication infrastructure requires regular maintenance and upgrades to maintain secure and reliable performance.
Perceiving the movement characteristics of specific body parts of a driver is crucial for determining their activity. Moreover, the driver’s body posture significantly impacts personnel safety during collision. This study investigates the creation of a dataset using Kinect depth camera for acquiring, organizing, annotating with skeleton tracking assistance, and optimizing interpolation. The pose recognition methods enhanced through an anchor regression mechanism, leading to the refinement of a lightweight anchor regression network capable of end-to-end learning ability from depth images. The improved backbone neck head structure offers advantages of reduced model parameters and enhanced accuracy. This engineering optimization makes it better suited for practical applications within vehicles with limited computational resources limitations and high real-time demands.
Xu, HailanLi, WuhuanLu, JunWang, XinHe, WenhaoChen, ZhenmingLiu, Yunjie
The present study aims to utilize a tire mathematical model that incorporates multiple contact points between the tire and the ground to provide a more accurate and realistic representation of the vertical and longitudinal dynamics of the Guarani 6x6 Armored Personnel Carrier (APC), a medium-wheeled vehicle used by the Brazilian Army. First, the subsystems involved in the longitudinal dynamics of the Guarani APC are introduced and modeled using TMeasy, a physical-mathematical model for tire slip behavior. Subsequently, the subsystems associated with the vehicle’s vertical dynamics are presented and modeled based on Ageikin’s concepts of obstacle negotiation. Finally, the longitudinal and vertical models are integrated to develop a multi-contact-point model with enhanced completeness, considering their mutual influence on each other. The modeling process is conducted within the Simulink® environment of MATLAB®. In each stage, simulations validate the proposed model’s suitability in representing the vehicle’s behavior under various operating conditions.
Godinho, Gabriel AsvolinsqueCosta Neto, Ricardo Teixeira
This study explores how digital transformation in the automotive sector contributes to sustainability, particularly through the elimination of paper-based processes. Accelerated by the COVID-19 pandemic, the integration of digital technologies has optimized operations and reduced costs across the industry. The research focused on the impact of data digitalization on eliminating printed reports and documents, aligned with Sustainable Development Goals (SDGs) 8, 12, and 15. A mixed-methods approach was used, combining qualitative and quantitative techniques. Data were collected via questionnaires and descriptive research conducted with employees of a multinational automotive company in São Paulo. Findings revealed that the transition to digital solutions eliminated the company’s average of 842 monthly printouts, improved process efficiency by 12%, and reduced data loss and rework. Key initiatives included automating performance indicators, adopting electronic signatures, and promoting virtual meetings—measures that streamlined workflows and strengthened competitiveness. The majority of employees surveyed reported increased efficiency and fewer operational errors after digitalization. Furthermore, 90% acknowledged a positive impact on sustainability, citing significant reductions in paper consumption. Benefits highlighted include task automation, improved communication, and faster decision-making. However, challenges such as the need for continuous training and technical support were also noted. Overall, the study concludes that digital transformation is vital for enhancing corporate sustainability and operational performance and recommends ongoing investment in employee training and digital infrastructure.
Assis, Dioclécio SilveiraJussani, Ailton CondeIbusuki, Ugo
Before Highway tunnel engineering is a complex system undergoing various evolutionary stages and characterized by multiple risk factors. The increasing interconnection and coupling of these risk factors can lead to operational accidents or disruptive events. These coupling effects pose significant challenges for project managers in effectively managing highway tunnel systems. Traditional risk-centered analysis approaches, which focus on post-event effects and causes while paying less attention to the coupling effects among risk factors, inadequately address these challenges. To fill this gap, this study examined the resilience evolution mechanism from all life cycle perspective and proposed a multi-factor and multi-stage resilience analysis framework. This integrated framework integrates the Natural Killing (N-K) model and the Interpretive Structural Model (ISM) to analyze coupling utility and implement decoupling control of resilience factors. The N-K model measures the coupling utility of three types of resilience factors: single, dual, and multi-factor. The output of this coupling effect is applied to the ISM model to determine decoupling strategies to control coupling risks based decoupling thinking. Finally, taking 112 major operational accidents in highway tunnel engineering as an empirical study, both domestically and internationally, from the perspectives of personnel, equipment, environment, and management. The results indicate that the risk coupling value of the resistance subsystem is the highest, followed by the recovery subsystem. In the resistance and recovery stages, the system is most likely to fail when disturbed, with personnel and management factors identified as the root causes.
Wang, ChunyuAn, Jingru
In the future battlefield, logistics UAVs will play an increasingly important role. The development of logistics UAVs abroad is rapid. Sort out the current development status of logistics UAVs in countries such as the United States, Russia, Israel, and Ukraine, including mission tasks, functional characteristics, and main performance indicators. In addition, the future technological trends of logistics UAVs are studied and predicted. Firstly, diversification of functions, which logistics UAVs will achieve diversified functions in the future, such as material transportation, aerial refueling, unmanned mother aircraft, and transfer of wounded personnel; Secondly, intelligent commendation and control, which logistics UAVs pursue the optimal efficiency in the four steps of ordering, dispatching, delivering, and evaluating in the “food delivery” mode; Finally, resource collaboration. In the collaborative logistics mode of “free riding”, logistics UAVs over a wide area are interconnected, achieving the free flow of our resources on the battlefield.
Zhai, JundaLiu, DaweiBai, QiangqiangHua, JinxingWang, XiaoyueYang, JianZou, XiaoyingGao, Yuxuan
The Operator’s Field of Vision (FOV) test, conducted in accordance with IS/ISO 5006:2017, is a vital assessment to ensure the safety and operational comfort of personnel operating Construction Equipment Vehicles (CEVs) / Earth-Moving Machinery. IS/ ISO 5006:2017 defines rigorous guidelines for evaluating the operator’s visibility from the driver's seat, with particular emphasis on the Filament Position Centre Point (FPCP), determined from the Seat Index Point (SIP) coordinates. The test includes assessment of masking areas, focusing on the Visibility Test Circle (a 24-meter diameter ground-level circle around the machine), and on the Rectangular Boundary on which a vertical test object is placed at a height specific to the machine type and its operating mass. These parameters are designed to simulate real-world operating conditions. This paper introduces a portable testing setup developed specifically for conducting the Operator’s FOV test as per IS/ISO 5006:2017. The setup facilitates include accurate verification of X and Y coordinates of the SIP, Integration of a high-intensity light system to project and assess masking areas, and Quick & repeatable deployment in field conditions, enhancing usability across various types of CEVs and earth moving machinery. The portable design ensures adaptability, reduces overall testing time, and upholds the accuracy requirements stipulated by IS/ISO 5006:2017. This solution not only enables more efficient visibility assessments but also supports enhanced safety compliance for manufacturers and operators. It presents a cost-effective, field-deployable solution for ensuring visibility requirements in construction equipment vehicles / earth-moving equipment.
Ghodke, Dhananjay SunilTambolkar, Sonali AmeyaBelavadi Venkataramaiah, Shamsundara
In order to improve the evacuation efficiency of sudden fire in urban rail transit station, taking the National Exhibition and Convention Center Station of Tianjin Rail Transit Line 1 as the research object, a three-dimensional model of the station is established. Based on the evening peak passenger flow on October 1, 2023, the parameters were calculated and reasonably set in the Pathfinder software to simulate the evacuation process of 3316 people in the fire scene of train arrival, and the evacuation process of sudden fire in the station is simulated. The simulation results show that the station can basically ensure the safe emergency evacuation within 6 minutes under the existing conditions. The stairs, escalators, automatic gate machine and passageways in the station are identified as the evacuation bottlenecks. The total time for all station personnel to evacuate outside the metro station is 514.8 s. According to the simulation results, some suggestions on evacuation strategy and emergency management are put forward from two aspects of existing infrastructure and personnel evacuation.
Fu, YanrongWang, LianxiaLi, YijuanLiu, YiboWang, Duolong
The assessment of collision risks is crucial for effective risk control and scientific management of maritime safety. To prevent maritime transportation accidents, an accident causation model has been proposed to analyze risks in maritime transportation systems. The 24-model further analyzes the impact pathways of accident factors in the accident chain and calculates the fit of HOF-related factors. Using Bayesian Networks as a foundation and the 24-model as a tool, a Bayesian Network model for collision risk is constructed by identifying risk factors and determining their correlations, utilizing accident data from Chinese maritime authorities. Utilizing a Bayesian Network to construct a ship collision risk model that couples HOF and calculates conditional probabilities of relevant node occurrences. To explore the coupled relationships between nodes in a network, this study employs the N-K model to construct a safety risk coupling model for ship collision accidents, calculating risk values for different coupling types within the model. Case analysis shows that accidents result from dynamic interaction and linear combination of risk factors. The analysis of experimental results indicates that various accident factors contribute differently to overall maritime risk. Human factors are the direct cause of maritime ship collision accidents. From the perspective of coupled risk, organizational factors, as root influences, are crucial aspects that bridge resource management needs to focus on. The application of this model provides maritime personnel with a novel approach to mitigate the risk of maritime collisions.
Li, JianminZhang, XiaochuanJia, DaweiZang, RuLyu, Hongguang
Like those in many other industries, truck and off-highway vehicle manufacturers face the challenge of producing quality components and maintaining productive processes while also generating a better bottom line. Improving employee training, simplifying complex operations and implementing better workflows can all help generate efficiencies. While not a new concept, lightweighting - in this case, reducing the weight of parts through the substitution of traditional steel with high-strength, thinner steels - can also be a viable answer to a better vehicle. As a rule of thumb, when manufacturers double the strength of the material through lightweighting, it is possible to reduce the weight of the part by one-third. That weight reduction can then lower the cost per part for greater profitability per piece of equipment and greater annual savings.
Gugel, Mick
Employment of Robotic and Autonomous Systems requires a different paradigm of mission planning, one which considers not only the tasks to be performed by the RAS themselves but regards the flow of information to support the observability of the RAS by the operator. GTRI has developed an initial capability for mission planning of mixed motive, heterogeneous, autonomous systems for management of macro level metrics that support the decision making of the operator or user during employment. The work is ongoing, extensible to additional capability sets, and modular to support integration of other autonomous capabilities.
Spratley, MichaelSchooley, AndrewDickerhoff, Trey
Virtual Reality (VR) systems are increasingly integrating haptic feedback to increase the level of immersion in virtual environments. This study is designed to investigate the impact of varying fidelity levels on the user experience when interacting with a tablet touchscreen User Interface (UI) in a virtual environment. Participants take part in touchscreen gesture-based tasks in different haptic fidelity levels, including no gloves, low haptic fidelity vibrotactile gloves, high haptic fidelity pneumatic gloves, and a real-world control condition. This study was designed to measure the user experience, which includes presence, embodiment, and system usability using qualitative surveys along with quantitative performance metrics. This study aims to understand how haptic feedback impacts the user experience to facilitate more informed employment of VR technology in training, simulation, and rapid prototyping.
Al-Shubeilat, FaresAthamnah, SolafAlJundi, Abdel RahmanBrudnak, MarkWood, RyanLouie, Wing Yue GeoffreyRawashdeh, Osamah
This SAE Aerospace Recommended Practice (ARP) describes training and approval of personnel performing certain thermal processing and associated operations that could have a material impact on the properties of materials being processed. It also recommends that only approved personnel perform or monitor the functions listed in Table 1.
AMS B Finishes Processes and Fluids Committee
This article presents an artificial neural network (ANN)–based hybrid design methodology for motors used in electric vehicle applications. The proposed method uses ANN to achieve a semi-optimized motor geometry, followed by the drive cycle analysis for the desired vehicle. For this, a large pool of motor design data is used as a training set for the ANN. The semi-optimized motor geometry is further processed for power factor improvement, overall motor efficiency, and electromagnetic noise reduction. The proposed method reduces the overall complexity of the iterative motor design and optimization process. The implementation of the method is demonstrated with a case study wherein a 110 kW three-phase induction motor is designed for an electric bus using the NREL drive cycle. The performance of the motor is verified using a finite element analysis motor using Maxwell ANSYS. The work described in this article was motivated by the complexities of the iterative motor design process, which involves a high level of human resources engagement and time consumption. To address this, the presented work proposes a design approach that bypasses all the complex parts of the work by applying machine learning. The main feature of the approach is that it adopts an ANN-based method that provides a primitive set of motor design parameters for different structures/models of the motor. It eases the work of the motor designer, who has to select the best possible motor structure among these structures and revamp it for further improvement of motor performance. The application of the method is more prolific if the motor is designed for an electric vehicle that exhibits variable loading conditions. The assessment of the proposed model by designing a heavy-duty exhibit shows a significant reduction in the process complexities.
Makkar, YashKumar, RajendraSah, BikashKumar, Praveen
A paper-based diagnostic device can detect COVID-19 and other infectious diseases in under 10 minutes, without the need for sophisticated lab equipment or trained personnel.
This AIR provides means of developing a composite training program, as stipulated by FAA AC 20-107B, FAA AC 65-33A, EASA AMC 20-29, and other similar regulatory guidance. Its approach is a comprehensive, sequential training curriculum build-up, customized to the specific needs of the organization (see Figure 2). It contains recommendations for the skill-building, training, and qualification of persons involved in the design, fabrication, maintenance, and repair of aircraft composite structures or other aviation composite components. It further addresses the qualification of administrative personnel and instructors. Flight operations are usually not in the scope of an SAE CACRC Standard; however, the recommendations of this report may be used also for this target audience. This report addresses persons responsible for the definition of training, qualification and authorization, or the supervision of aviation personnel. Its content intends to facilitate the development of a formal composite training program which describes the means to train, qualify, and authorize the organization’s personnel. SAE CACRC has produced several training standard documents, each representing the best-practice, recommended minimum training syllabus for its targeted audience. The purpose of this report is to promote the use of these training standards for developing training programs for employees in airlines and maintenance organizations, and as reference in regulatory guidance material. It provides a quick reference to the SAE CACRC training standard documents (see 2.1.1). Thereby, it allows its users to either develop appropriate in-house trainings or to select external training providers and courses that acceptably conform with the syllabi covered by the SAE CACRC training standard documents. It also supports the organization to recognize existing training records of individuals by comparing their equivalence with these standards. This report does not intend to introduce new training content/syllabus. This report does not intend to establish a licensing standard.
AMS CACRC Commercial Aircraft Composite Repair Committee
This study investigates the evolution of axial and radial velocities in the downwash-outwash region of a counter-rotating coaxial rotor hovering in-ground effect (IGE). The presence of the ground deflects the axial flow of the rotor wake radially outward, with mean radial velocities reaching approximately 2Vh along the ground. Based on the observed velocity profiles, the wake was classified into three distinct regions: the downwash region characterized by maximum wake contraction, the transition region where flow turns from axial to radial, and the outwash region exhibiting wall jet behavior. Results show that increasing inter-rotor spacing d/R and rotor height above ground (z/R)l extends the downwash and transition regions, delaying the onset of radial outwash. Aerodynamic loads on personnel were estimated, showing maximum mean forces and moments of 120N and 120Nm, remaining within safety thresholds for untrained personnel. However, the loads exceeded these limits for heavy-category helicopters with higher disk loading. Instantaneous velocities revealed unsteady behavior driven by tip vortex convection, with peak velocities reaching 2.8Vh and peak loads approximately 50% higher than mean values, as identified using the 98th percentile approach. Frequency analysis confirmed that fluctuations at the rotor frequency dominated the unsteadiness in the rotor wake. These findings provide critical insights for safe rotorcraft operation near ground surfaces and contribute to informed vertiport design and personnel safety guidelines.
Rajendiran Vijayaraj, Aditya SuvithirajMoore, ZacharyRaghav, Vrishank
This SAE Recommended Practice is intended to establish a procedure to certify the fundamental driving skill levels of professional drivers. This certification can be used by the individual driver to qualify their skills when seeking employment or other professional activity. These certification levels may also be used by test facilities or other organizations when seeking test or professional drivers of various skills. The associated family of documents listed below establish driving skill criteria for various specific categories. SAE J3300: Driving level SAE J3300/1: Low mu/winter driving SAE J3300/2: Trailer towing SAE J3300/3: Automated driving Additional certifications to be added as appropriate. This main document provides: (1) common definitions and general guidance for using this family of documents, (2) directions for obtaining certification through Probitas Authentication®1, and (3) driving level examination requirements.
Driving Skills Standards Committee
The acceleration vibe of a car's engine can be enhanced and a brand-specific auditory identity can be created via active sound design. Currently, experienced engineers are desperately required when the active sound design for car acceleration roar was processing, which consumed substantial time and human resources. Therefore, it is critical to conduct a research on the evaluation model for estimating car acceleration sound quality to improve sound design efficiency and reducing costs. 1,003 acceleration roars samples of common cars were collected in this paper, all of which could be commonly heard by the road. Nine psychoacoustic objective parameters, such as loudness, sharpness, and roughness, were calculated through Artemis Suite software, establishing a database for the sound quality of car acceleration sounds.Moreover, subjective evaluations of sound playback and objective data analysis were conducted to obtain the ratings of acceleration sounds. Firstly, five objective psychoacoustic parameters are constructed to evaluate the vehicle sound quality based on the correlation analysis. Subsequently, an evaluation and prediction model of acceleration sound quality based on MLP(Multi layer Perceptron) was constructed, with psychoacoustic parameters as input features and subjective evaluation scores as output, which correlates objective test data with subjective evaluation results. This model was determined as the evaluation model for car acceleration sound quality for this case, and the average prediction accuracy rate of which is more than 90%, providing key technical support for promising active sound design of car engines.
Xiong, ChenggangXie, LipingZhang, ZheweiShi, WeijieQian, YushuLiu, Zhien
A continuous effort to improve reliability and efficiency of processes is at the forefront of any successful business. One methodology that can have a crucial impact in this effort is Lean Six Sigma (LSS), which aims to reduce variability and wasteful activities within a company’s processes, in turn leading to improvements in areas such as customer satisfaction, employee morale, regulatory compliance, and profitability. In the medical device industry, where a seemingly minor error could be life-threatening, LSS can play a pivotal role in patient safety. This article presents a case study illustrating the benefits of LSS for a medical device manufacturing company, as well as one of its key customers.
Los Angeles-based plastics contract manufacturer Kal Plastics deployed UR10e trimming cobot for a fraction of the cost and lead time of a CNC machine, cut trimming time nearly in half, and reduced late shipments to under one percent — all while improving employee safety and growth opportunities.
Lead-filled aprons are currently used for atomic number (Z)-grade radiation shielding in the medical industry to protect personnel from hazardous gamma radiation. These apron garments are made with lead-filled elastomeric sheets encased in polymeric fabrics and are both heavy and bulky to meet necessary shielding requirements. In addition, there are environmental safety concerns surrounding disposal of these garments due to their lead content. An innovator at NASA Langley Research Center has developed a novel method for making thin, lightweight radiation shielding that can be sprayed or melted onto common textiles used in clothing such as cotton, nylon, polyester, Nomex, and Kevlar.
Clear and consistent communication directly affects product quality, employee satisfaction and retention, regulatory compliance, and patient safety. This article explores key communication challenges in medtech manufacturing, details methods for measuring communication effectiveness, and provides strategies for improving communication in this highly regulated industry.
At $829 billion in revenues, 2023 was a banner year for the aerospace industry led by civil aviation companies. Despite its strength, operations were hampered by production constraints, the lingering effects of supply chain and workforce disruptions, and higher materials costs. Even as those issues abate, the commercial sector is chasing accelerated demand. A flood of new aircraft orders pushing backlogs at an accelerated pace is causing the industry to struggle as it seeks to ramp up production. If the dynamic persists, many airlines will be forced to revise or postpone existing plans for enlarging, refreshing, or greening their fleets.
Recent advancements in electric vertical take-off and landing (eVTOL) aircraft and the broader advanced air mobility (AAM) movement have generated significant interest within and beyond the traditional aviation industry. Many new applications have been identified and are under development, with considerable potential for market growth and exciting potential. However, talent resources are the most critical parameters to make or break the AAM vision, and significantly more talent is needed than the traditional aviation industry is able to currently generate. One possible solution—leverage rapid advancements of artificial intelligence (AI) technology and the gaming industry to help attract, identify, educate, and encourage current and future generations to engage in various aspects of the AAM industry. Beyond Aviation: Embedded Gaming, Artificial Intelligence, Training, and Recruitment for the Advanced Air Mobility Industry discusses how the modern gaming population of 3.3 million individuals could be engaged through embedded AAM-based scenarios and AI-enhanced grading systems for concept creation, engineering, manufacturing, air space design and management, piloting, remote operations, infrastructure planning, vehicle operations. Click here to access the full SAE EDGETM Research Report portfolio.
Doo, Johnny
A new aviation supply chain integrity coalition has offered 13 recommended actions to prevent the circulation of non-serialized aircraft parts throughout the global aviation industry. Embry-Riddle Aeronautical University, Daytona Beach, FL In the summer of 2023, a receiving clerk in the procurement department of TAP Air Portugal, a Lisbon-based airline, made a curious discovery: A $65 engine part that should have appeared brand-new showed signs of significant wear. The clerk checked the documentation from the London-based parts supplier and noticed that the submitted documentation was also suspicious. Using his safety training, the employee immediately reported the anomaly to TAP Air Portugal management, which raised the issue with the jet engine's manufacturer. Little did the procurement clerk know at the time, but this escalation led to one of the biggest investigations in the history of the aviation supply chain, as reported by Reuters and the British Broadcasting Corporation in 2023.
Have you ever gazed at the vastness of the stars and wondered what else your CNC machine can create? Greg Green had the opportunity to find out when he joined the staff at the Canada-France-Hawaii Telescope (CFHT) in Waimea, Hawaii.
Manually checking the quality of components or products in industry is labor-intensive for employees and error-prone on top of that. The Fraunhofer Institute for Mechatronic Systems Design IEM is unveiling a solution that provides total versatility in this area. In an it’s OWL supported collaboration with Diebold Nixdorf and software specialist verlinked, Fraunhofer IEM has created a combination of collaborative robot (cobot), AI-based image analysis and IoT platform. The system frees employees from having to perform visual inspections and can be incorporated into all kinds of testing scenarios. The Fraunhofer researchers presented a demonstrator of the cobot/IoT platform at the 2024 Hannover Messe Trade Show in February.
To identify the influences of various built environment factors on ridership at urban rail transit stations, a case study was conducted on the Changsha Metro. First, spatial and temporal distributions of the station-level AM peak and PM peak boarding ridership are analyzed. The Moran’s I test indicates that both of them show significant spatial correlations. Then, the pedestrian catchment area of each metro station is delineated using the Thiessen polygon method with an 800-m radius. The built environment factors within each pedestrian catchment area, involving population and employment, land use, accessibility, and station attributes, are collected. Finally, the mixed geographically weighted regression models are constructed to quantitatively identify the effects of these built environment factors on the AM and PM peak ridership, respectively. The estimation results indicate that population density and employment density have significant but opposite influences on the AM and PM peak ridership, which can be attributed to the opposite travel directions of commuters in the AM and PM peak. The recreational facility density, road density, and 10-min walking accessibility could significantly positively affect the PM peak ridership, and their influences vary greatly over space. Besides, the operating time of stations significantly positively affects both the AM and PM peak ridership, transfer stations have significantly larger PM peak ridership and terminal stations have significantly larger AM peak ridership. The findings are expected to provide new insights for agencies to formulate appropriate measures to improve the ridership of urban rail transit.
Su, MeilingLiu, LingChen, XiyangLong, RongxianLiu, Chenhui
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