Browse Topic: Active safety systems

Items (1,955)
In the context of the automotive industry’s rapid evolution, traffic safety has become a top priority. Automobile active safety technology has shown great potential in reducing traffic accidents. Soft targets in intelligent vehicle testing play a pivotal role in assessing active safety performance. However, these targets are designed according to standards set by European and American countries, which may not fully reflect China’s needs. The study’s objective is to design a library of pedestrian parameter models that meet Chinese standards. It began with the design of a representative pedestrian target, created using Chinese body size parameters and data. An experimental investigation was then conducted to determine the radar characteristics of pedestrian targets. A comparative analysis was performed with reference products. The study led to the creation of a model library for pedestrian targets, following the Chinese standard. It was formulated using experimental data and standards.
Tian, XinpengGuo, JuweiChen, XingyuZhang, JieZhang, XinWang, Ke
In the automotive industry, zonal architecture is a design approach that organizes a vehicle’s electronic and communication architecture into specific zones. These zones group components based on their function into the same control unit, allowing for more efficient integration and simplified communication between the various systems of the vehicle. To improve the efficiency of information centralization, zonal architecture groups Electronic Control Units (ECUs) according to their functionalities, facilitating faster data exchange between them and enabling better prioritization filtering among different categories. An important aspect of this architecture is the implementation of the Controller Area Network Flexible Data-rate (CAN FD) protocol and Automotive Ethernet. These are serial communication protocols specifically developed for automotive applications, enabling higher transmission rates and larger data packets. With the growing need for higher speed and quality in communication
Santos, Felipe CarvalhoPaterlini, Bruno ScaranoPereira, Luca Angelone CanheteBaptistella, Luiz Felipe LeardiniPedroso, Henrique GomesMilani, Pedro Henrique PiresGama, Ulisses Araujo
Automatic emergency braking (AEB) systems are crucial for road safety but often face performance challenges in complex road and climatic conditions. This study aims to enhance AEB effectiveness by developing a novel adaptive algorithm that dynamically adjusts braking parameters. The core of the contribution is a refined mathematical model that incorporates vehicle-specific correction coefficients and a real-time prediction of the road–tire friction coefficient. Furthermore, the algorithm features a unique driver-style adaptation module to optimize warning times. The developed system was functionally tested on a vehicle prototype in scenarios including dry, wet, and snow-covered surfaces. Results demonstrate that the adaptive algorithm significantly improves collision avoidance performance compared to a non-adaptive baseline, particularly on low-friction surfaces, without introducing excessive false interventions. The study concludes that the proposed adaptive approach is a vital step
Petin, ViktorKeller, AndreyShadrin, SergeyMakarova, DariaAntonyan, AkopFurletov, Yury
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Tobolski, Sue
This article entails the design, manufacturing, application, testing, and analysis/discussion of a controller area network (CAN)–based vehicle safety system that detects vehicle failure such as brake failure, gear failure, tire blowouts, and other failures that can be monitored using digital or analogue sensors. The aim and objectives are to implement a real-life tire blowout on an Iveco S-Way Euro III and design a system that sends out CAN-based messages using J1939 protocol to the Iveco S-Way Euro III to downshift the gears, retarders, activate the limp mode braking system, activate the hooter, and activate the hazards. The system is split into five sections: (1) detection and activation, (2) gear control system, (3) retarder control system, (4) braking control system, and (5) hooter and hazard control system; while analyzing the: acceleration in the lateral, longitudinal, and vertical acceleration (g) vs. time (s), vehicle speed (km/h), rate of deflation (s), and the steering torque
Rampath, AmaanStopforth, RiaanProctor-Parker, Craig
This article suggests a validation methodology for autonomous driving. The goal is to validate front camera sensors in advanced driver-assist systems (ADAS) based on virtually generated scenarios. The outcome is the CARLA-based hardware-in-the-loop (HIL) simulation environment (CHASE). It allows the rapid prototyping and validation of the ADAS software. We tested this general approach on a specific experimental application/setup for a vehicle front camera sensor. The setup results were then proven to be comparable to real-world sensor performance. The CARLA simulation environment was used in tandem with a vehicle CAN bus interface. This introduced a significantly improved realism to user-defined test scenarios and their results. The approach benefits from almost unlimited variability of traffic scenarios and the cost-efficient generation of massive testing data.
Cardozo, Shawn MosesHlavác, Václav
Present study aims to analyze different E/E architectures trending in automotive industry currently. This study shows the comparison analysis done between zonal architecture and distributed architecture. Comparison methodology includes duration simulation performed for a vehicle feature on both architectures. Present study has adopted MBSE approach for the analysis. Study includes analysis done for distance control, airbag activation and rear park assist features developed on zonal and domain architecture. Duration simulation is also performed on same feature on both architectures. While performing duration simulation of all above features on both zonal and distributed architecture time constraints where assumed based on run time machine performance. Results shows that when only feature must be executed distributed architecture is more feasible. However, when feature has been made more updatable, upgradable and scalable Zonal architecture has been more feasible. To summarize study
Mishra, Ayush Manish
Brake failures in the vehicles can cause hazardous accidents so having a better monitoring and emergency braking system is very important. So, this project consists of an autonomous brake failure detector integrated with Automatic Braking using Electromagnetic coil braking which detects the braking failure at the time and applied the combinations of the brakes, to overcome this kind of accidents. So, here the system comprises of IR sensor circuit, control unit and electromagnetic braking system. How it works: The IR sensor monitors the brake wire, and if the wire is broken, the control unit activates the electromagnetic brakes, stopping the vehicle in a safe manner. This system enhances vehicle safety by ensuring immediate braking action without driver intervention. Key advantages include real-time brake monitoring, reduced mechanical wear, quick response time, and an automatic failsafe mechanism. The system’s minimal reliance on hydraulic components also makes it suitable for harsh or
Raja, SelvakumarJohn, GodwinSiddarth, J PSenthilkumar, AkashMathew, AbhayR. S., NakandhrakumarNandagopal, SasikumarArumugam, Sivasankar
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Tobolski, Sue
The rapid development of the automobile industry has put forward higher requirements for safe travel, especially in today’s vigorous development of new energy vehicle technology, faster driving speed and more intelligent vehicle configuration, which makes the automobile safety technology become a key research direction. If you can judge the current driving state of the vehicle and provide early warning information to the driver, the occurrence of traffic accidents can be avoided to a large extent. However, in the current field of vehicle safety technology, vehicle collision warning systems are rarely involved. Therefore, this paper proposes a system functional architecture for vehicle front collision warning, which can provide the driver with collision warning according to the current state of the vehicle. If the driver fails to take effective actions within a specified time, the vehicle will automatically brake. This function can effectively avoid the occurrence of traffic accidents.
Shao, YoulinZhao, GuochuLi, XiaoqingShi, LingCheng, Zhiqing
Central to predicting the impacts of individual vehicle operations within microscopic traffic simulation is the driver model. A driver model determines a vehicle’s velocity profile in various driving scenarios and interactions with other vehicles. Characteristics including driver behavior and interactions with stop signs, traffic signals, and with a lead vehicle can be modeled and assessed with a representative driver model. This paper presents the application of an existing intelligent driver model (IDM) with an adaptation for vehicle following dynamics and the interaction with the lead vehicle to be more representative of driver assist systems concerning the relative distance between the lead and simulated ego vehicle. The method uses an additional control term to augment the existing IDM and reduce the inter-vehicle distance to the time gap. The impact on vehicle dynamics is compared and validated with real-world ego vehicle data recorded through driver-assist systems. The adapted
Udipi, AnirudhJadhav, ShreeprasadBhure, MayurHegde, BharatkumarPoovalappil, AmanRobare, AndrewApostol, PeterBahramgiri, MojtabaNaber, Jeffrey
Functional safety forms an important aspect in the design of systems. Its emphasis on the automotive industry has evolved significantly over the years. Till date many methods have been developed to get appropriate fault tree analysis (FTA) for various scenarios and features pertaining to autonomous driving. This article is an attempt to explore the scope of using generative artificial intelligence (GenAI) FTA with the use case of malfunction for the LIDAR sensor in mind. We explore various available open source large language models (LLM) models and then dive deep into one of them to study its responses and provide our analysis. Although the article does not solve the entire problem but has given some guidance or thoughts/results to explore the possibility to train existing LLM through prompt engineering for FTA for any autonomy use case aided with PlantUML tool.
Shetiya, Sneha SudhirGarikapati, DivyaSohoni, Veeraja
Armored vehicles offer limited view to the driver and crew. Two-dimensional vision-based situational awareness (SA) systems provide the driver a view of the area around the vehicle. The addition of distance to objects can offer a more comprehensive understanding of the surroundings assisting the driver with the locations of obstacles and rollover hazards. Methods currently available or under development for depth perception have issues limiting their utility in the field.. Some interfere with crew operations, others are are too costly, are not covert or require excessive processing. We offer a low-cost and computationally efficient approach called Kinetically Enhanced Situational Awareness (KESA) that derives distance to objects using existing SA sensors and processors combined with a knowledge of vehicle kinematics. We demonstrate how range can be used to enhance and supplement AI based driver assistance and threat warnings.
Pilgrim, Robert A.Brown, Roy C.
The growing emphasis on road safety and environmental sustainability has spurred the development of technologies to enhance vehicle efficiency. Accurate vehicle mass knowledge is crucial for all vehicles, to optimize advanced driver assistance systems (ADAS) and CCAM (Connected, Cooperative, and Automated Mobility) systems, as well as to improve both safety and energy consumption. Moreover, the continuous need to report precisely on the greenhouse emissions for good transports is becoming a key point to certificate the impact of transportation systems on the environment. Mass influences longitudinal dynamics, affecting parameters such as rolling resistance and inertia, which in turn are critical to adaptive control strategies. Moreover, the knowledge of vehicle mass represents a key challenge and a fundamental aspect for fleet managers of heavy-duty vehicles. Typically, this information is not readily available unless obtained through high-cost weighing systems or estimated
Vicinanza, MatteoAdinolfi, Ennio AndreaPianese, Cesare
This study presents the development and validation of a numerical model for a hybrid electric vehicle (HEV) and battery electric vehicle (BEV), with a focus on analyzing battery degradation under various driving scenarios and modes. The proposed model integrates a comprehensive vehicle dynamics framework with a detailed battery model to evaluate the impact of different driving conditions on battery performance and longevity. The vehicle model captures the hybrid powertrain's behavior, including energy management strategies, while the battery model incorporates electrochemical dynamics to predict degradation mechanisms such as capacity fade and resistance increase. Two primary driving scenarios are examined: urban driving, characterized by frequent stops, accelerations, and transitions between aggressive and relaxed driving styles, and long-distance highway driving, where cruising speeds and driving patterns vary. The urban scenario emphasizes the effects of stop-and-go traffic and
Martinez, SantiagoMerola, SimonaIrimescu, AdrianBibiloni Ipata, Sebastian
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