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Dynamic Object Map based architecture for robust CVS systems.

Hyundai Motor Group-Syed Mahmud
University of Central Florida-Rodolfo Valiente, Arash Raftari, Mahdi Zaman, Yaser Pourmohammadi Fallah
  • Technical Paper
  • 2020-01-0084
To be published on 2020-04-14 by SAE International in United States
Connected and Autonomous Vehicles (CAV) rely on information obtained from sensors and communication to make decisions. In a Cooperative Vehicle Safety (CVS) system, information from remote vehicles (RV) is available at the host vehicle (HV) through the wireless network. Safety applications such as crash warning algorithms use this information to estimate the RV and HV states. However, this information is uncertain and sparse due to communication losses, limitations of communication protocols in high congestion scenarios, and perception errors caused by sensor limitations. In this paper we present a novel approach to improve the robustness of the CVS systems, by proposing an architecture that divide application and information/perception subsystems. This architecture is enabled by a Dynamic Object Map (DOM) middle layer which uses the received data from HV local sensors and integrates it with the data received through wireless communication to track RVs and create a real-time dynamic map of HV’s surrounding. The architecture is validated with simulations and in a real environment using a remote vehicle emulator (RVE), which allows the joint study of the…
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Research on Simulation and Verification Platform of Vehicle-way Cooperative Algorithm Based on C-V2X

Anhui Jianghuai Automobile CO., LTD-Li Wei Bing, Wu Qiong
Chinese Academy of Sciences-Liang Hua Wei
  • Technical Paper
  • 2020-01-1292
To be published on 2020-04-14 by SAE International in United States
The V2X system covers three broad categories scenario of security, efficiency, and service, and each type of scenario can be refined into a number of specific application scenarios. It is difficult to verify the V2X system protocol stack and the application scenario algorithm during the period of the actual vehicle verification, in which it is difficult to cover the real-vehicle application working conditions of the comprehensive V2X system, especially the complex traffic condition. In order to verify the reliability and stability of the V2X system under various application conditions, a vehicle-way cooperative algorithm development framework and its simulation and verification platform are proposed. The development and verification process of the vehicle-mounted system based on the V model is taken into account by the algorithm development framework and the simulation platform, and the cross-application between the traffic simulation and the network simulation is constructed based on the SUMO and the NS3. First, the platform utilizes Simulink to set up the V2X sub-segment application scenario algorithm, secondly it makes use of SUMO to construct the traffic scenario,…
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ROS and XCP in Traditional ECU Development

ETAS Inc.-Tobias Gutjahr, Matthew Roddy
  • Technical Paper
  • 2020-01-1367
To be published on 2020-04-14 by SAE International in United States
Originally developed for the service robot industry, the Robot Operating System (ROS) has lately received a lot of attention from the automotive sector with use cases, especially, in the area of advanced driver assistance systems and autonomous driving (ADAS/AD). Introduced as communication framework on top a of a host operating system, the value proposition of ROS is to simplify the software development in large-scale heterogeneous computing systems. Developers can focus on the application layer and let ROS handle the discovery of all participants in the system and establish communication in-between them. Despite the recent success of ROS, standardized automotive communication protocols such as the Universal Measurement and Calibration Protocol (XCP) are still dominant in the electronic control unit (ECU) development of traditional vehicle subsystems like engine, transmission, braking system, etc. XCP guarantees that common measurement and calibration tools can be used across different vehicles with ECUs from multiple suppliers. With the advancing area of ADAS/AD, we also expect the presence of ROS-based modules in the development of new vehicle platforms to increase. In this paper,…
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A Study of Using a Reinforcement Learning Method to Improve Fuel Consumption of a Connected Vehicle with Signal Phase and Timing Data

The University of Alabama-Ashley Phan, Hwan-Sik Yoon
  • Technical Paper
  • 2020-01-0888
To be published on 2020-04-14 by SAE International in United States
Connected and automated vehicles (CAVs) promise to reshape two areas of the mobility industry: the transportation and driving experience. The connected feature of the vehicle uses communication protocols to provide awareness of the surrounding world while the automated feature uses technology to minimize driver dependency. Constituting a subset of connected technologies, vehicle-to-infrastructure (V2I) technologies provide vehicles with real-time traffic light information, or Signal Phase and Timing (SPaT) data. In this paper, the vehicle and SPaT data are combined with a reinforcement learning (RL) method as an effort to minimize the vehicle’s energy consumption. Specifically, this paper explores the implementation of the deep deterministic policy gradient (DDPG) algorithm. As an off-policy approach, DDPG utilizes the maximum Q-value for the state regardless of the previous action performed. In this research, the SPaT data collected from dedicated short-range communication (DSRC) hardware installed at 16 real traffic lights is utilized in a simulated road modeled after a road in Tuscaloosa, Alabama. The vehicle is trained using DDPG and the SPaT data to determine the optimal action to take in…
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Non-contact Overload Vehicle Recognition by Vehicle to Roadside Unit

Cong linpeng
  • Technical Paper
  • 2020-01-0940
To be published on 2020-04-14 by SAE International in United States
Overloading of vehicles will affect the safety of driving, aggravate the wear of automobile brake system and make the braking distance of overloaded vehicles too long. Secondly, when the vehicle is overloaded, due to the increase of load, the stress will exceed the allowable value, which will cause early wear and damage of the parts, resulting in a decrease in the reliability of the service life of the vehicle. At present, for the detection of overloaded vehicles, most areas still adopt the method of static overload detection station or adopt the monitoring mode of traditional manual watching by installing video monitoring system. It is not efficient at all. To solve these problems, a overload vehicle detection system based on V2R (Vehicle to Roadside Unit) is developed. The system collects engine speed, engine torque and other signals through the CAN (Controller Area Network), and uses DSRC (Dedicated Short Range Communications) to directly transmit the vehicle data information to the roadside detection unit. As the speed signal collected by CAN is detected by wheel speed sensor, and…
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Optimal Management of Charge and Discharge of Electric Vehicles Based on CAN Bus Communication

Suizhou-WUT Industry Research Institute-Gangfeng Tan
Wuhan University of Technology-Haoyu Wang, Donghua Guo, Zhenyu Wang, Hanyu Zhang, Zhicheng Hu
  • Technical Paper
  • 2020-01-1297
To be published on 2020-04-14 by SAE International in United States
With the shortage of energy and the continuous development of automotive technology, electric vehicles are gradually gaining popularity. However, during the running of the electric vehicle, there is a risk of exhaustion of the electric power, and the position of the charging pile is fixed, which is likely to cause anxiety and worry of the owner. At present, there is a lack of an effective energy consumption prediction system, which is convenient for the driver to make reasonable driving planning guidance. As a standard serial communication protocol of ISO, CAN bus has a simple structure, short development cycle, stability and reliability. In this paper, the CAN bus is used to extract the dynamic parameter information of the speed, engine speed and throttle opening of the traveling vehicle in real time. At the same time, based on the GPS and cloud database, the road condition information of the expected driving section is comprehensively considered, and the real-time energy consumption prediction model of the electric vehicle is established. The predicted value is compared with the remaining electricity,…

Vehicle Safe-Mode, Concept to Practice Limp-Mode in the Service of Cybersecurity

SAE International Journal of Transportation Cybersecurity and Privacy

Hamachvan Ltd., Israel-Yuval Montvelisky
Israel-Avishai Wool
  • Journal Article
  • 11-02-02-0006
Published 2020-02-27 by SAE International in United States
This article describes both a concept and an implementation of vehicle safe-mode (VSM) - a mechanism that may help reduce the damage of an identified cyberattack to the vehicle, its driver, the passengers, and its surroundings. Unlike other defense mechanisms that try to block the attack or simply notify of its existence, the VSM mechanism responds to a detected intrusion by limiting the vehicle’s functionality to safe operations and optionally activating additional security countermeasures. This is done by adopting ideas from the existing mechanism of Limp-mode that was originally designed to limit the damage of a mechanical, or an electrical, malfunction and let the vehicle “limp back home” in safety. Like Limp-mode, the purpose of safe-mode is to limit the vehicle from performing certain functions when conditions arise that could render full operation dangerous: Detecting a malfunction in the Limp-mode case is analogous to detecting an active cybersecurity breach in the safe-mode case, and the reactions should be analogous as well. We demonstrate that the VSM can be implemented, possibly even as an aftermarket add-on:…

New Architectural Design of the Runtime Server for Remote Vehicle Communication Services

SAE International Journal of Connected and Automated Vehicles

Germany-Vladivy Poaka
Technische Universität Clausthal, Germany-Sven Hartmann
  • Journal Article
  • 12-03-01-0002
Published 2020-01-17 by SAE International in United States
This article addresses the issue of a design to provide remote vehicle communication services sustainably. These services include new features such as remote repair of Electronic Control Unit (ECU)’s software errors and feature on demand, to mention just a few key objectives. With the usual implementations of the Modular Vehicle Communication Interface (MVCI) runtime server [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14] many difficulties remain [15]. They are not sustainable and require dedicated hardware. The Dictionary Server discussed here provides necessary data to diagnostic applications in general, without putting at risk Original Equipment Manufacturer (OEM)’s expertise. It also provides data to the road infrastructure for V2V- and Vehicle-to-Infrastructure (V2X)-based services. This crucial diagnostic data contains ECUs’ communication parameters, memory programming data, and other available functions. They are kept confidentially by OEMs. Furthermore, our solution is nondisruptive, as it also supports traditional vehicle communication services. We evaluated a prototype in terms of time complexity, scalability, and availability.
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Research on CAN FD Controller Conformance Test System

Tongji University-Feng Luo, Zhuo Fu
Published 2019-11-04 by SAE International in United States
The Controller Area Network with Flexible Data-Rate (CAN FD) is invented to compensate for the limited bandwidth of Controller Area Network (CAN). The technology of CAN FD bus conformance test is a prerequisite for the interconnection and normal work of different manufacturers’ CAN FD module, and is of great significance for ensuring the reliability of the CAN FD network. Firstly, the communication protocol conformance test theory is briefly analyzed and the characteristics of the CAN FD protocol are introduced in this paper. Then the test scope and test objects of CAN FD conformance test are pointed out. This paper mainly focuses on the CAN FD controller conformance test, which is belong to chip test. The controller implements the most parts of data link layer in a CAN FD module. Furthermore, the test method and the test cases are elaborated. Based on the coordinated test method, a conformance test system is designed and the hardware and software are developed for the test system. The execution of the test process requires communication and coordination between the test…
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The 6 Most Important Parts of a Temperature Monitoring System

  • Magazine Article
  • TBMG-35462
Published 2019-11-01 by Tech Briefs Media Group in United States

In the past few years, it has become increasingly common for hospitals, clinics, healthcare and life science organizations, and other businesses to use an electronic temperature monitoring system to safeguard their products and satisfy regulatory demands. You may know that you need a monitoring system, possibly with alarming capabilities, but aren't sure how to select the best one to meet your needs. To complicate matters, there are literally dozens of different types of temperature monitoring systems with different features and a wide range of prices.