Browse Topic: Logistics

Items (7,356)
The automotive industry is facing unprecedented pressure to reduce costs without compromising on quality and performance, particularly in the design and manufacturing. This paper provides a technical review of the multifaceted challenges involved in achieving cost efficiency while maintaining financial viability, functional integrity, and market competitiveness. Financial viability stands as a primary obstacle in cost reduction projects. The demand for innovative products needs to be balanced with the need for affordable materials while maintaining structural integrity. Suppliers’ cost structures, raw material fluctuations, and production volumes must be considered on the way to obtain optimal costs. Functional aspects lead to another layer of complexity, once changes in design or materials should not compromise safety, durability, or performance. Rigorous testing and simulation tools are indispensable to validate changes in the manufacturing process. Marketing considerations are also
Oliveira Neto, Raimundo ArraisSouza, Camila Gomes PeçanhaBrito, Luis Roberto BonfimGuimarães, Georges Louis Nogueira
Design validation plays a crucial role in the overall cost and time allocation for product development. This is especially evident in high-value manufacturing sectors like commercial vehicle electric drive systems or e-axles, where the expenses related to sample procurement, testing complexity, and diverse requirements are significant. Validation methodologies are continuously evolving to encompass new technologies, yet they must be rigorously evaluated to identify potential efficiencies and enhance the overall value of validation tests. Simulation tools have made substantial advancements and are now widely utilized in the development phase. The integration of simulation-based or simulation-supported validation processes can streamline testing timelines and sample quantities, all the while upholding quality standards and minimizing risks when compared to traditional methods. This study examines various scenarios where the implementation of advanced techniques has led to a reduction in
Leighton, MichaelTuschkan, AlwinPlayfoot , Ben
Modern vehicles are increasingly integrating electronic control units (ECUs), enhancing their intelligence but also amplifying potential security threats. Vehicle network security testing is crucial for ensuring the safety of passengers and vehicles. ECUs communicate via the in-vehicle network, adhering to the Controller Area Network (CAN) bus protocol. Due to its exposed interfaces, lack of data encryption, and absence of identity authentication, the CAN network is susceptible to exploitation by attackers. Fuzz testing is a critical technique for uncovering vulnerabilities in CAN network. However, existing fuzz testing methods primarily generate message randomly, lacking learning from the data, which results in numerous ineffective test cases, affecting the efficiency of fuzz testing. To improve the effectiveness and specificity of testing, understanding of the CAN message format is essential. However, the communication matrix of CAN messages is proprietary to the Original Equipment
Shen, LinXiu, JiapengZhang, ZhuopengYang, Zhengqiu
The computational efficiency of dynamic programming (DP) energy management strategies is enhanced through the discretization of state variables in this study. The upper and lower bounds of SOC (State of Charge) and the SOC variation at each moment are calculated using the maximum and minimum power of the range extender, which eliminates invalid state combinations and significantly reduces the size of the feasible state set. To investigate the impact of different sampling intervals on SOC during various phases, intervals at 1s, 2s, 4s, 5s, and 10s are set for both charge retention and consumption phases. It is revealed that in the consumption phase, different sampling intervals minimally affect SOC, with trajectories closely matching. However, in the charge retention phase, the impact of different sampling intervals on SOC is significant, resulting in considerable differences in SOC trajectories. Additionally, in the charging-discharging (CD) phase, fuel consumption significantly varies
Wei, ChangyinWei, YiyuYang, DinghaoWang, YichenLiu, Dezheng
LIDAR-based autonomous mobile robots (AMRs) are gradually being used for gas detection in industries. They detect tiny changes in the composition of the environment in indoor areas that is too risky for humans, making it ideal for the detection of gases. This current work focusses on the basic aspect of gas detection and avoiding unwanted accidents in industrial sectors by using an AMR with LIDAR sensor capable of autonomous navigation and MQ2 a gas detection sensor for identifying the leakages including toxic and explosive gases, and can alert the necessary personnel in real-time by using simultaneous localization and mapping (SLAM) algorithm and gas distribution mapping (GDM). GDM in accordance with SLAM algorithm directs the robot towards the leakage point immediately thereby avoiding accidents. Raspberry Pi 4 is used for efficient data processing and hardware part accomplished with PGM45775 DC motor for movements with 2D LIDAR allowing 360° mapping. The adoption of LIDAR-based AMRs
Feroz Ali, L.Madhankumar, S.Hariush, V.C.Jahath Pranav, R.Jayadeep, J.Jeffrey, S.
This paper presents a work undertaken to simulate the logistics processes in the digital environment using a discrete event simulation software which involves the movements of the Material Handling Equipment [MHE]. MHE movements to the line side involves traffic, where the parts are transported from the supermarket area to the line side based on the part requirement list ordered from the line side. The intersections are the bottleneck in the system due to the traffic and if the vehicle scheduling is not streamlined, then during any failure/stoppage of the vehicle, would result in the blocking of the preceding vehicles causing line stoppage. This work outlines to develop a junction block in the digital environment using a discrete event driven approach where an optimal flow of the vehicles is maintained at the intersections. The Junction block is created based on the succeeding track occupancy level, thus the preceding MHE’s can overtake in case of any blockages based on the priority
Surendranath, SujithAmasa, SanjayKotegar, Shravan RajVenkataramana, SurendharSathiyamoorthi, Gokul
Electric vehicles are transforming the future of transportation for the world while achieving the goal of sustainable development. While the concept and use of battery-powered vehicles has also penetrated the logistics and supply chain industry, it has also brought upon new challenges during its development. As OEMs strive to develop BEVs with extended range, the components within the propulsion and drivetrain system tend to demand a higher power output from the energy storage systems. This results in BEVs generating higher levels of thermal heat energy, which must be dissipated / rejected for optimal performance and safety. Consequently, to reject this heat, BEVs must utilize thermal management systems with higher capacities. This increase in size is accompanied by the inclusion of many parts that generate noise and contribute to increased noise levels in BEVS. In today’s market, optimization of noise levels is a significant factor when ensuring passenger comfort, while also showing
Shedge, Atharva VikasShalgar, SandeepSrivastava, SarveshNagarhalli, Prasanna V
Heavy-duty vehicles, particularly those towing higher weights, require a continuous/secondary braking system. While conventional vehicles employ Retarder or Engine brake systems, electric vehicles utilize recuperation for continuous braking. In a state where HV Battery is at 100% of SOC, recuperated energy from vehicle operation is passed on to HPR and it converts electrical energy into waste heat energy. This study focuses on identification of routes which are critical for High Power Brake Resistors (HPRs), by analyzing the elevation data of existing charging stations, the route’s slope distribution, and the vehicle’s battery SOC. This research ultimately suggests a method to identify HPR critical vehicle operational routes which can be useful for energy efficient route planning algorithms, leading to significant cost savings for customers and contributing to environmental sustainability
Thakur, ShivamSalunke, OmkarAmbuskar, MandarPandey, Lokesh
This SAE Aerospace Standard (AS) identifies the requirements for mitigating Counterfeit EEE parts in the Authorized Distribution Channel. If an organization is not performing Authorized Distribution but acting as another seller (such as an Authorized Reseller, Broker, or Independent Distributor), then only 3.3.1 applies
G-19 Counterfeit Electronic Parts Committee
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
This specification covers metric aircraft quality spacers for use as positioners for tubes, flat washers for use as load spreaders, galling protection of adjacent surfaces and or material compatibility, and key or tab washers for use as locks for bolts, nuts, and screws
E-25 General Standards for Aerospace and Propulsion Systems
ABSTRACT The military has a unique requirement to operate in different terrains throughout the world. The ability to travel in as much varying terrain as possible provides the military greater tactical options. This requirement/need is for the tire to provide a variable footprint to allow for different ground pressure. Much of the current run-flat technology utilized by the military severely limits mobility and adds significant weight to the unsprung mass. This technology gap has allowed for the development of new run-flat tire technology. New tire technology (fig 1) has been developed that substantially increases survivability, eliminates the need for heavy run-flat inserts, significantly reduces air pressure requirements and provides full (or near full) speed capability in degraded/damaged mode (punctured tire). This run-flat technology is built directly into the tire, yet maintains the normal variable footprint of a normal pneumatic tire. This makes the tire/wheel assembly much
Capouellez, JamesPannikottu, AbrahamGerhardt, Jon
ABSTRACT In order to assess a design from a supportability perspective early in a technology’s prototyping phase, TARDEC’s Systems Engineering Directorate has established a Design for Supportability (DfS) competency. This competency, under the SE umbrella, encompasses the relationship between Design for Reliability (DfR), Design for Maintainability (DfM), and Design for Logistics (DfL). The combination of DfR, DfM and DfL form a trifecta of knowledge that determines whether a developing technology will: 1) perform its intended function for the complete duration of the mission it’s designed for; 2) be designed in a way to be fixable in a reasonable amount of time using standard tools; 3) be designed to have replaceable parts as accessible as possible; 4) not increase the logistics burden for our men and women in uniform
Majcher, MonicaEaly, James
ABSTRACT To support customers during product development, General Dynamics Land Systems (GDLS) utilizes a set of Operations Research/Decision Support processes and tools to facilitate all levels of decision-making aimed at achieving a balanced system design. GDLS employs a rigorous Structured Decision (SD) process that allows for large, highly complex or strategic decisions to be made at the system-of-systems, system, and/or subsystem level. Powerful, robust tools -the Advanced Collaborative System Optimization Modeler (ACSOM) and Logical Decisions for Windows (LDW) - are used to make relatively quick assessments and provide recommendations. The latest ACSOM algorithms have increased the response time for trade study analysis by over 2,000 times and future versions will incorporate logistics analysis helping to reduce vehicle Life Cycle Cost
Gerlach, JamesHartman, GregoryWilliams, DarrellParent, Jeffery
ABSTRACT Northrop Grumman has developed Tactical Ground Vehicle High-Availability (HA) middleware conforming to open standards specified by the Service Availability Forum (SAF), a consortium of industry-leading communications and computing companies. The software hot-spare and standby capabilities realized by this technology operate across tightly and loosely coupled farms of processors, ensuring critical processes remain operational with zero or minimal interruption, as chosen by system architects. High availability software delivers key benefits to the warfighter. Systems experience less downtime, helping to maintain continuity of tactical operations. Both hardware and software failures are managed, reducing the impact on system aborts and essential function failures and therefore reducing the number of computing elements required to meet system level availability SWAP-CC (Size, Weight, Power, and Cost, Cooling). The wrappers Northrop Grumman has created for open source and
Nguyen, Tri
ABSTRACT The M109A7/M992A3 Paladin Integrated Management (PIM) is a sustainment program designed to bring the M109 Family of Vehicles (FOV) up-to-date and extend the service life of the fleet. PIM consists of the sustainment and upgrade of two military tracked vehicles; the Paladin M109A6 Self Propelled Howitzer (SPH) and the M992A2 Carrier Ammunition, Tracked (CAT). The M109A7/M992A3 program is engineered to improve readiness, avoid component obsolescence, and increase sustainability. These changes will increase the performance of the M109A7/M992A3, eliminate obsolescence issues associated with supplying new parts to the M109A6 and M992A2, and ease the logistics burden within the Artillery Brigade Combat Team (ABCT) through commonality of spares parts. The PIM project has been a multi-phase project with development expected to continue into 2015
Bailey, BruceMiller, Mark R.Brinton, GordonSwartz, EricHamilton, GeorgeUetz, PaulJochum, EricRegmont, Dennis
ABSTRACT The DoD Digital Engineering Strategy [1] released in June 2018 outlined the DoD’s strategic goals which “promote the use of digital artifacts as a technical means of communication across a diverse set of stakeholders” In addition to build, test, field and sustainment of defense systems, emphasis was placed on the acquisition and procurement of systems and the importance of digital engineering. This was further reinforced in the Feb 2022 release of the Engineering of Defense Systems Guidebook [2] which contains Digital Engineering sections in each chapter. The norm for Systems Engineering has become Model-Based Systems Engineering (MBSE) in which models are used at all phases of development. To complete the digital thread from concept to disposal, models will be required for the acquisition phase. This paper will describe Model-Based Acquisition (MBAcq), and how it can be used to increase clarity compliance and understanding in Capability Systems and Software Acquisition for
Hause, Matthew CHart, Laura E
ABSTRACT We propose new methods to help automate the design of customizable mufflers, as well as modular manufacturing techniques targeted at mid volume quantities. A successful solution would reduce the price point of a muffler to an estimated $500 per unit for a order size between 10 and 1000 units. In the ideal case, customers would not need to inventory mufflers because lead times would be fast and managed
Nelson, KevinKangas, GregMattson, SteveHufnagel, Alan
ABSTRACT Accurate reliability assessment requires accurate output distribution. To obtain correct output distribution, a very large number of output physical test data is required, which is prohibitively expensive. Regarding this, simulation-based methods have been developed under the assumption that: (1) accurate input distribution models obtained from large number of input test data; and (2) accurate simulation model (including surrogate model if utilized) that correctly represents physical phenomena. However, in real application, only limited numbers of input test data are available. Thus, input distribution models are uncertain. In addition, the simulation model could be biased due to assumptions and idealizations. Furthermore, only a limited number of physical output test data is available. As a result, a target output distribution to which simulation model can be validated is uncertain and the corresponding reliability is also uncertain. This paper proposes a confidence-based
Choi, K.K.Cho, HyunkyooMoon, Min-yeongGaul, NicholasLamb, DavidGorsich, David
ABSTRACT Automatic guided vehicles (AGV) have made big inroads in the automation of assembly plants and warehouse operations. There are thousands of AGV units in operation at OEM supplier and service facilities worldwide in virtually every major manufacturing and distribution sector. Although today’s AGV systems can be reconfigured and adapted to meet changes in operation and need, their adaptability is often limited because of inadequacies in current systems. This paper describes a wireless navigated (WN) omni-directional (OD) autonomous guided vehicle (AGV) that incorporates three technical innovations that address the shortfalls. The AGV features consist of: 1) A newly developed integrated wireless navigation technology to allow rapid rerouting of navigation pathways; 2) Omnidirectional wheels to move independently in different directions; 3) Modular space frame construction to conveniently resize and reshape the AGV platform. It includes an overview of the AGVs technical features
Cheok, Ka CRadovnikovich, MichoFleck, PaulHallenbeck, KevinGrzebyk, SteveVanneste, JerryLudwig, WolfgangGarner, Robert
ABSTRACT Product Development (PD) remains a highly uncertain process for both commercial and DoD programs. The presence of multiple stakeholders (e.g., DoD and allied agencies, soldiers/users, PEO, contractors, manufacturing, service, logistics) with varying requirements, preferences, constraints, and evolving priorities make this particularly challenging for the DoD. These risks are well recognized by agencies, and it is widely understood that acquisition is about risk management and not certainties. However, almost all the DoD acquisition processes still require critical reviews, and most importantly, structured decision support for the fuzzy front-end of the acquisition process. What is lacking, are effective decision support tools that explicitly recognize the sequential milestone structure embedded with multi-stakeholder decision making in all acquisition programs. We describe the Resilient Program Management & Development (RPMD) framework to support complex decision making with
Murat, AlperChinnam, Ratna BabuRana, SatyendraRapp, Stephen H.Hartman, Gregory D.Lamb, David A.Agusti, Rachel S.
ABSTRACT Timely part procurement is vital to the maintenance and performance of deployed military equipment. Yet, logistical hurdles can delay this process, which can compromise efficiency and mission success for the warfighter. Point-of-need part procurement through additive manufacturing (AM) is a means to circumvent these logistical challenges. An Integrated Computational Materials Engineering framework is presented as a means to validate and quantify the performance of AM replacement parts. Statistical modeling using a random forest network and finite element modeling were to inform the build design. Validation was performed by testing coupons extracted from each legacy replacement parts, as well as the new additively manufactured replacement parts through monotonic tensile and combined tension-torsion fatigue testing. Destructive full hinge assembly tests were also performed as part of the experimental characterization. Lastly, the collected experimental results were used to
Gallmeyer, Thomas GDahal, JineshKappes, Branden BStebner, Aaron PThyagarajan, Ravi SMiranda, Juan APilchak, AdamNuechterlein, Jacob
ABSTRACT An increasing pace of technology advancements and recent heavy investment by potential adversaries has eroded the Army’s overmatch and spurred significant changes to the modernization enterprise. Commercial ground vehicle industry solutions are not directly applicable to Army acquisitions because of volume, usage and life cycle requirement differences. In order to meet increasingly aggressive schedule goals while ensuring high quality materiel, the Army acquisition and test and evaluation communities need to retain flexibility and continue to pursue novel analytic methods. Fully utilizing test and field data and incorporating advanced techniques, such as, big data analytics and machine learning can lead to smarter, more rapid acquisition and a better overall product for the Soldier. Logistics data collections during operationally relevant events that were originally intended for the development of condition based maintenance procedures in particular have been shown to provide
Heine, RichardFrounfelker, BradSalins, LaneWang, Chongying
ABSTRACT Lockheed Martin Missiles and Fire Control has developed a robotic site shuttle for use in structured areas, such as commercial railroad yards, port operations and storage/distribution industries. The purpose of the site shuttle is to provide an autonomous taxi service for personnel needing to move to various locations around the facilities. Many rail yards, ports and storage area are very large, so “taxi” transportation is vital to maintain efficiency and safety. The shuttle vehicles operate in complete autonomy: they have no steering wheel, accelerator or brake pedal. Personnel using the vehicles have only emergency stop buttons in the front and rear of the vehicles. Once implemented, the robotic shuttles will considerably reduce the costs of operation for the company. This need is consistent throughout the rail, port and storage/distribution industries, as all need to move personnel around their yards
Nimblett, DonMills, Myron
Abstract The paper will provide representative simulations of particle transport around a vehicle in order to investigate some of the issues related to the accurate prediction of emission and transport of particles induced by a moving vehicle with a transverse blowing wind. Special treatments in boundary conditions and wall law function are discussed and applied to maintain the shape of atmospheric boundary layer wind velocity profile. For the vehicle, we adopt the geometry of a Nissan Pathfinder SUV to study the effects of vehicle emission and transport around a moving vehicle. We perform a set of simulations to better understand the modeling requirements for dust emissions including a sensitivity study to determine the modeling parameters that are most important for accurate modeling of dust generation and transport. In particular, we study the effects of location, size distribution, and initial velocity distributions of the modeled dust emissions on predicted downwind atmospheric
Tong, XiaolingLuke, Edward A.Smith, Robert E.
ABSTRACT Power and energy demands on military vehicles and other large systems have been increasing significantly and modifications to these power systems are being explored on several programs. A key decision in a new power system is determining whether to use “high voltage” or “low voltage” for distribution throughout the vehicle. This decision has far reaching consequences throughout the vehicle and needs to be made after careful consideration. This paper addresses key trade-off criteria for consideration when comparing high voltage and low voltage vehicle architectures and then addresses a few other considerations for this type of decision
Knakal, Anthony
ABSTRACT Acquisition programs typically develop a set of system requirements early in their lifecycle, which then become the standard against which future designs are evaluated. It is critical that these requirements be set at appropriate levels. Requirement sets that are not simultaneously achievable are a relatively common problem in military acquisition programs and often are not recognized until significant investment has already been made – sometimes even leading to program cancellation. The Advanced Requirements Integration & Exploration System (ARIES) is designed to aid program stakeholders in understanding the requirements trade space for a system and facilitate the identification of an achievable set of requirements. This paper presents the ARIES methodology, describes the analytic capability, and discusses its application. Citation: A.I. Dessanti, D.J. Anderson, S.M. Henry, A.J. Pierson, R.S. Agusti, M.A. Zabat, “Advanced Requirements Integration & Exploration System (ARIES
Dessanti, Alexander I.Anderson, Dennis J.Henry, Stephen M.Pierson, Adam J.Agusti, Rachel S.Zabat, Michael A.
ABSTRACT One of the biggest challenges in developing TRA is the determination of the critical technology elements (CTEs). This paper outlines a systematic process used to identify all potential technologies developed by the contractors during the Technology Development (TD) Phase and applies criteria for selection of CTEs. To reduce the subjectivity in the assessment, the relevant technical requirements for each CTE that are important to the customers will be established. These requirements must be met to demonstrate the level of maturity required before entering the Engineering & Manufacturing Development (EMD) Phase. The maturity of a CTE cannot be evaluated in isolation. The paper also includes other system requirements that the CTEs must satisfy before the overall system can be evaluated. A major defense ACAT vehicle acquisition program, Joint Light Tactical Vehicle (JLTV), was used to demonstrate the TRA process in preparation for the MS-B Review with the Assistant Secretary of
Tzau, JeromeDolan, AnthonyWithun, MattGoetz, RichardJohnson, BrettPutrus, Johnathon
ABSTRACT This paper discusses the packaging characteristics of a family of power-packs for military land vehicles in the 21st century. 3 classes of vehicles are considered: light vehicles (300 - 600 Hp), medium weight vehicles (600-1000 Hp) and heavy vehicles (1000-1500 Hp). The paper highlights that a common bore engine approach provides both very good performance and a very compact power-pack. 2 different engine styles are examined. The results are expected to be applicable for a spectrum of modernized engine platforms that would employ a common bore engine approach. The approach offers many product development and production advantages, including lower development and tooling costs, and reduced product inventory needs, lead times, development costs, in addition to reduced product development risk. Various trade study parameters are considered in addition to engine power. Power-pack configurations based on a common bore approach shows significant commonality advantages and
Kacynski, KenBauman, AndreasJohnson, S. Arnie
ABSTRACT Leveraging an open standard may still not achieve the desired interoperability between systems. Addressing “lessons learned” from past implementations of open standards for various Department of Defense (DoD) acquisition programs is critical for future success. This paper discusses past issues which range from insufficient technical detail, when and how to apply a given specification, verification of an implementation’s compliance, to inconsistent and imprecise contractual language. This paper illustrates how the Vehicular Integration for C4ISR/EW Interoperability (VICTORY) initiative addresses these challenges to enable interoperability on Army ground vehicles, as well as facilitate rapid technology insertion and incorporation of new capabilities. VICTORY represents a leap ahead in solving interoperability challenges and defining open standards
Dirner, JasonMelber, AdamPankowski, John A.
ABSTRACT The military has a need to source propulsion systems that have enhanced efficiencies, lower noise signatures, and improved lifetimes over existing power systems. This is true for energy storage systems on unmanned ground vehicles and for manned vehicles (i.e., Auxiliary Power Units). Fuel cells have the promise to achieve all of these goals. However, to be truly effective, these advanced systems should integrate seamlessly with the current supplies of energy storage (batteries) and energy sources (logistics fuel). The largest fuel cell development hurdle to date has been the ability to handle sulfur concentrations present in logistics fuel. Secondly, the reformer must be capable of several thousands of hours of operation utilizing logistics fuels without loss of performance due to sulfur or carbon deposition. Advancements in several key technologies have the potential to allow development of a logistics fueled solid oxide fuel cell with similar size, weight, and power
Westrich, Thomas
ABSTRACT Increased fuel efficiency in military vehicles today results in two primary positive impacts to operational conditions. The first is the reduction in cost; both as a result of reduced fuel consumed and also in the costs saved due to the reduction in logistics required to transport fuel to the Warfighter in the field. The second and more important positive impact is the reduced risk of casualties to the Warfighter by reducing the frequency of fuel related logistical support required in the field. This paper first provides an overview of the development of the Fuel Efficient Demonstrator (FED) Bravo vehicle from initial conceptual efforts through to final operational shake-out and performance testing. A review the development process from CAD modeling through to fabrication and testing will be discussed. This discussion will also focus on the unique methods and ideas used to address the particular challenges encountered in developing a demonstrator vehicle. The paper concludes
Card, BrandonTodd, StevenBuchholz, William
ABSTRACT The Department of Defense has identified the need for increased expeditionary, long range, and mobile capabilities to support standard logistics resupply, as well as the ability to perform logistics resupply in austere and special operations environments. The purpose of such a system is to quickly provide critical supplies to the Warfighter on the ground. In order to quickly get the supplies to the designated target location, a vertical take-off aircraft is used. Stratom has developed the eXpeditionary Robo-Platform (XR-P)™ which is a vertically inserted semi-autonomous robotic logistical vehicle designed to meet the demanding logistical needs of the warfighter. The XR-P will be able to carry, among other things, two standard pallets of 120mm rifled mortar rounds weighing 2700 pounds and have the capability to tow a trailer, all while meeting strict MV-22 cargo air certification requirements when fully loaded. By automating various aspects of the transport task of the resupply
Rosenblum, Mark
Abstract On the Mobile Detection Assessment Response System (MDARS) production program, General Dynamics Robotics Systems (GDRS) and International Logistics Systems (ILS), are working with the US Army’s Product Manager – Force Protection Systems (PM-FPS) to reduce system costs throughout the production lifecycle. Under this process, GDRS works through an Engineering Change Proposal (ECP) process to improve the reliability and maintainability of subsystem designs with the goal of making the entire system more producible at a lower cost. In addition, GDRS recommends substitutions of Government requirements that are cost drivers with those that reduce cost impact but do not result in reduced capability for the end user. This paper describes the production lifecycle process for the MDARS system and recommends future considerations for fielding of complex autonomous robotic systems
Frederick, BrianVirtz, PaulGrinnell, Michal
ABSTRACT Developing preventive and corrective maintenance strategies for military ground vehicles based on asset readiness and lifecycle cost is a challenge due to the complexity associated with the collection and storage of maintenance and failure data in the operational environment. Many of the past reliability centered maintenance efforts have encountered significant challenges in collecting, identifying, accessing, cleaning, enhancing, fusing, and analyzing the data. Another challenge is creating and maintaining complex simulation models that require significant effort and time to produce business value. The work described in this paper is the result of a collaborative effort among multiple US Army organizations to simplify the approach in order to gain valuable insight from the existing data. It is shown how the resulting process can be used to develop simplified models to optimize corrective and preventive maintenance programs. Details are provided on how to work with the
Gugaratshan, GugaSrinivasan, SyamalaHarrison, DeanCastanier, Matthew P.Wade, Jody D.Jones, J. Isaac “Ike”
ABSTRACT A distinctive feature of unmanned and conventional terrain vehicles with four or more driving wheels consists of the fact that energy/fuel efficiency and mobility depend markedly not only on the total power applied to all the driving wheels, but also on the distribution of the total power among the wheels. As shown, under given terrain conditions, the same vehicle with a constant total power at all the driving wheels, but with different power distributions among the driving wheels, will demonstrate different fuel consumption, mobility and traction; the vehicle will accelerate differently and turn at different turn radii. This paper explains the nature of mechanical wheel power losses which depend on the power distribution among all the driving wheels and provides mathematical models for evaluating vehicle fuel economy and mobility. The paper also describes in detail analytical technology and computational results of the optimization of wheel power distributions among the
Vantsevich, Vladimir V.Gray, Jeremy P.
ABSTRACT Design for structural topology optimization is a method of distributing material within a design domain of prescribed dimensions. This domain is discretized into a large number of elements in which the optimization algorithm removes, adds, or maintains the amount of material. The resulting structure maximizes a prescribed mechanical performance while satisfying functional and geometric constraints. Among different topology optimization algorithms, the hybrid cellular automaton (HCA) method has proven to be efficient and robust in problems involving large, plastic deformations. The HCA method has been used to design energy absorbing structures subject to crash impact. The goal of this investigation is to extend the use of the HCA algorithm to the design of an advanced composite armor (ACA) system subject to a blast load. The ACA model utilized consists of two phases: ceramic and metallic. In this work, the proposed algorithm drives the optimal distribution of a metallic phase
Goetz, John C.Tan, HuadeRenaud, John E.Tovar, Andrés
ABSTRACT In monolithic protection materials, a threat increase correlates to an increased material thickness. This is evident in V50 armor material specifications, such as Rolled Homogeneous Armor (RHA) MIL-DTL-12560K. This relationship translates to combat system level weight; the higher the performance, the higher the material weight, the higher the system weight. For ground combat systems, the total platform weight indicates relative protection. Hence, the M1 Abrams weight and protection level is greater than the Bradley Family of Vehicles, and the Bradley weight and protection level is greater than the M113. The weight procurement dollarization impacts are known during developmental efforts, but weight relationships also impact training and sustainment costs. Thus armor based weight changes have at least three cost relationships: procurement, training, and sustainment. These cost relationships are useful to understand in the context of the Army’s annual budget cycle. Citation: RA
Howell, Ryan A.
ABSTRACT The Department of Defense is a major consumer of petroleum products – over 700 million gallons per day. While the majority of fuel consumed is for aircraft, in terms of logistics and exposure of personnel to hazardous conditions, the amount of fuel consumed in ground vehicles is considerable, with the cost (in-theatre, delivered) ranging from $100 to $600/gallon. This paper addresses the impact that parasitic friction mechanisms (boundary lubrication and lubricant viscosity) have on engine friction and overall vehicle efficiency. A series of mechanistic models of friction losses in key engine components was applied to investigate the impact of low-friction technologies on the fuel consumption of heavy-duty, on-road vehicles. The results indicate that fuel savings in the range of 3 to 5% are feasible by reducing boundary friction and utilizing low-viscosity engine lubricants. The paper will discuss the implications of the studies (as performed for commercial heavy-duty trucks
Fenske, G. R.Erck, R. A.Ajayi, O. O.Masoner, A.Comfort, A. S.
ABSTRACT This GVSETS paper outlines the strategy for integrating Digital Engineering (DE) practices into the Detroit Arsenal (DTA) acquisition, engineering, and sustainment communities. A DTA DE Community of Practice (CoP) is being led by Program Executive Office (PEO) Ground Combat Systems (GCS), PEO Combat Support & Combat Service Support (CS&CSS), Combat Capabilities Development Command (DEVCOM) Ground Vehicles Systems Center (GVSC), and Tank-Automotive & Armaments Command (TACOM). In addition, Program Management Offices (PMOs) will document their DE implementation plans as part of all planning documents per Assistant Secretary of the Army for Acquisition, Logistics & Technology (ASA[ALT]) guidance [1]. In this paper, each of the DTA organizations will address the following: Ongoing DE Related Efforts; Upcoming / Planned Efforts / Opportunities; Lessons Learned; and Challenges / Issues / Help Needed. Additionally, each DTA organization explains its current and future states along
Alexander, EricReilly, GlennKwietniewski, AndrewBerklich, Bill
ABSTRACT Situations exist that require the ability to preposition a basic level of energy infrastructure. Exploring and developing the arctic’s oil potential, providing power to areas damaged by natural or man-made disasters, and deploying forward operating bases are some examples. This project will develop and create a proof-of-concept electric power prepositioning system using small autonomous swarm robots each containing a power electronic building block. Given a high-level power delivery requirement, the robots will self-organize and physically link with each other to connect power sources to storage and end loads. Each robot mobile agent will need to determine both its positioning and energy conversion strategy that will deliver energy generated at one voltage and frequency to an end load requiring a different voltage and frequency. Although small-scale robots will be used to develop the negotiation strategies, scalability to existing, large-scale robotic vehicles will be
Weaver, Wayne W.Mahmoudian, NinaParker, Gordon G.
ABSTRACT Digital Engineering (DE) strategy is defined by the Department of Defense and establishes five goals [1]. One of the goals includes providing an enduring, authoritative source of truth, which moves the primary means of communication from documents to digital models and data. This enables access, management, analysis, use, and distribution of information from a common set of digital models and data. As a result, stakeholders have the current, authoritative, and consistent information for use over the lifecycle. The DE Model Based Systems Engineering (MBSE) Reference Architecture Framework (RAF) defines, at a minimum, the digital model authoritative source of truth, model structure, stakeholder needs, systems and subsystem context, process model elements, architecture types, views, viewpoints, and supporting methodologies and best practices. This framework is defined using the Systems Modeling Language, semantics, and constructs. The RAF structure is expressed to support DE
Griffin, Kevin W.Suffredini, Giuseppe D.Kanon, Robert J.Dua, Surender K.Yeh, Jihsiang J.Alexander, Eric J.Feury, Mark R.Kouba, Russell D.
Electrohydrodynamic (EHD) technology, noted for its absence of moving mechanical parts and silent operation, has attracted significant interest in plane propulsion. However, its low thrust and efficiency remain key challenges hindering broader adoption. This study investigates methods to enhance the propulsion and efficiency of EHD systems, by examining the electrohydrodynamic flow within a wire-cylinder corona structure through both experimental and numerical approaches. A multi-wire-cylinder positive corona discharge experimental platform was established using 3D printing technology, and measurements of flow velocity, voltage, and current at the cathode outlet were conducted. A two-dimensional simulation model for multi-wire-cylinder positive corona discharge was developed using Navier-Stokes equations and FLUENT user-defined functions (UDF), with the simulation results validated against experimental data. The analysis focused on the effects of varying anode diameters and the
Huang, GuozhaoDong, GuangyuZhou, Yanxiong
Airflow directionality in a vehicle cabin is one of the concerns of car owners, researchers, and vehicle manufacturers. After exposed/parked in hot ambient condition for a long time, HVAC system normally takes few minutes to cool down and reach an acceptable cabin temperature for the passenger comfort. To ensure proper airflow distribution inside the cabin, the AC duct & vanes ability to direct airflow must be evaluated. Objective of this work is to propose a methodology for developing the vane design of AC system duct using CFD approach. Two different goals are attempted. Firstly, the effect of horizontal and vertical vane angle on airflow directionality is investigated with DoE approach. Then factors influencing the airflow directionality are investigated using factorial study approach. CFD based factorial analysis (L9 orthogonal array) was conducted using three components at three levels. The impact of number of horizontal vanes, number of vertical vanes and distance between them on
Mahesh, ABaskar, SubramaniyanRaju, KumarGopinathan, Nagarajan
This set of criteria is intended for use by accredited Certification Bodies (CBs) to establish compliance and grant certification to AS6081A. It may also be used by others to assess compliance to AS6081A requirements
G-19 Counterfeit Electronic Parts Committee
This document specifically pertains to cybersecurity for road vehicles. This document encompasses the entire vehicle lifecycle of key management. It has been developed by SAE Committee TEVEES18F, Vehicle Security Credentials Interoperability (VSCI), a subcommittee of SAE Committee TEVEES18A, Vehicle Cybersecurity Systems Engineering Committee. This committee is authorized under the scope and authority fo the SAE Electronic Design Automation Steering Committee (also known as the Electronic Systems Group) that is directly under the scope and authority fo the SAE Motor Vehicle Council. The SAE Motor Vehicle Council’s stated scope of influence and authority, as defined by the SAE includes, passenger car and light truck in conjunction with ISO/SAE 21434
Vehicle Electrical System Security Committee
Items per page:
1 – 50 of 7356