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2007 IEEE International Conference on Vehicular Electronics and Safety最新文献

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OSGi based integrated service platform for automotive telematics 基于OSGi的汽车远程信息处理综合服务平台
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456369
Yunfeng Ai, Yuan Sun, Wuling Huang, X. Qiao
With the enormous market potentials of telematics industry and for further gains in safety and convenience, automotive telematics has become a hot R&D area in mobile computing and ITS. Quite a number of telematics services have been proposed by automakers and third-party service providers. This paper describes an OSGi based in-vehicle telematics service platform, by which telematics services can be accessed by end users. Both the hardware and software platforms are analyzed from the application and implementation points of view. Finally, application examples are introduced and some concluding remarks are drawn for this paper.
随着车载信息处理行业的巨大市场潜力,以及对安全性和便利性的进一步追求,汽车车载信息处理已成为移动计算和智能交通领域的一个研究热点。汽车制造商和第三方服务提供商已经提出了相当多的远程信息处理服务。本文介绍了一个基于OSGi的车载信息服务平台,通过该平台,终端用户可以访问车载信息服务。从应用和实现的角度对硬件平台和软件平台进行了分析。最后介绍了应用实例,并对本文作了总结。
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引用次数: 18
A location method for autonomous vehicle based on integrated GPS/INS 基于GPS/INS集成的自动驾驶汽车定位方法
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456376
Qingmei Yang, Jianmin Sun
The location system is a key technology of autonomous vehicle. Autonomous vehicle can sense all kinds of information and make decisions during moving out of door. The integrated GPS/INS location system of autonomous vehicle based on data fusion is studied in the paper. Based on the analysis of location methods, such as the Global Positioning System (GPS), inertial navigation system (INS), dead reckoning (DR) system and the vector electronic map, GPS and IMS are integrated in the location system of the autonomous vehicle. The GPS/INS integrated location system is designed. Kalman filter is used in the GPS subsystem and the IMS subsystem. Data of fusion of INS/GPS is simulated. The results of simulation show that the fusion location can improve the precision and reliability of the location system.
定位系统是自动驾驶汽车的一项关键技术。自动驾驶汽车可以感知各种信息,并在行驶过程中做出决策。研究了基于数据融合的自动驾驶汽车GPS/INS综合定位系统。在分析全球定位系统(GPS)、惯性导航系统(INS)、航位推算系统(DR)和矢量电子地图等定位方法的基础上,将GPS和IMS集成到自动驾驶汽车的定位系统中。设计了GPS/INS综合定位系统。在GPS分系统和IMS分系统中采用了卡尔曼滤波。对INS/GPS融合数据进行了仿真。仿真结果表明,融合定位可以提高定位系统的精度和可靠性。
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引用次数: 12
A fuzzy control strategy and optimization for four wheel steering system 四轮转向系统的模糊控制策略及优化
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456359
Jie Zhang, Yunqing Zhang, Liping Chen, Jingzhou Yang
This paper presents a fuzzy logic control strategy on four-wheel steering(4WS) vehicle based on a multi-body vehicle dynamic model. The multi-body vehicle dynamic model based on ADAMS can accurately predict the dynamics performance of the vehicle. Fuzzy logic is applied to track the yaw velocity of the two degrees of freedom ideal model through the co-simulation of ADAMS and Matlab Fuzzy control unit with the optimized membership function. The fuzzy control parameters are optimized and analyzed by a combined optimization algorithm (Genetic Algorithm (GA) and Nonlinear Programming Quadratic Line search (NLPQL) method) combined with response surface model (RSM). Single lane change test is chosen to validate the fuzzy control logic strategy. Simulation result shows that four-wheel steering vehicle with the fuzzy control logic strategy can improve vehicle handling stability greatly comparing with traditional front wheel steering.
提出了一种基于多体车辆动力学模型的四轮转向车辆模糊控制策略。基于ADAMS的多体车辆动力学模型能够准确预测车辆的动力学性能。通过ADAMS和Matlab模糊控制单元的联合仿真,利用优化的隶属函数,应用模糊逻辑对两自由度理想模型的横摆速度进行跟踪。采用遗传算法(GA)和非线性规划二次线搜索法(NLPQL)结合响应面模型(RSM)对模糊控制参数进行了优化和分析。选择单变道试验来验证模糊控制逻辑策略。仿真结果表明,与传统的前轮转向相比,采用模糊控制逻辑策略的四轮转向车辆可以大大提高车辆的操纵稳定性。
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引用次数: 25
Adaptive OSEK Network Management for in-vehicle network fault detection 面向车载网络故障检测的自适应OSEK网络管理
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456405
J. Suwatthikul, R. McMurran, R.P. Jones
Rapid growth in the deployment of networked electronic control units (ECUs) and enhanced software features within automotive vehicles has occurred over the past two decades. This inevitably results in difficulties and complexity in in-vehicle network fault diagnostics. To overcome these problems, a framework for on-board in-vehicle network diagnostics has been proposed and its concept has previously been demonstrated through experiments. This paper presents a further implementation of network fault detection within the framework. Adaptive OSEK Network Management, a new technique for detecting network level faults, is presented. It is demonstrated in this paper that this technique provides more accurate fault detection and the capability to cover more fault scenarios.
在过去的二十年中,汽车中网络电子控制单元(ecu)和增强软件功能的部署迅速增长。这必然给车载网络故障诊断带来困难和复杂性。为了克服这些问题,提出了一种车载网络诊断框架,并通过实验验证了其概念。本文在此框架下进一步实现了网络故障检测。提出了一种新的网络级故障检测技术——自适应OSEK网络管理。本文证明,该技术提供了更准确的故障检测和能力,涵盖更多的故障场景。
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引用次数: 10
Obstacles detection and collision avoidance system developed with virtual models 利用虚拟模型开发了障碍物检测与避碰系统
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456397
R. Sosa, G. Velazquez
Insurance companies have notice that since 1984, a couple of years after antilock braking systems (ABS) were introduced in market, traffic accidents and its injuries have been decreased. Developments in electronics and mechanics have improved the vehicle performance in collision. Lately several developments on preventing or avoiding collision have raised as active safety systems or so called in Europe, Advanced Driver Assistance Systems (ADAS). Systems as adaptive cruise control, lane change assist and blind spot detection have been developed facing the challenge of avoiding collision. In present paper is shown a model of collision avoidance for automotive applications. The system includes a model for vehicle dynamics: it was developed with the causal software AMESIM. Decision functions were developed to determine when an object is a dangerous obstacle, those functions depends on relative speed, and distance between host vehicle and obstacle. Vehicle model and decision functions are integrated to become a system for collision avoidance. The system warns the driver in a distance safe enough to avoid the collision in case the driver neglects warnings, the system begins braking in order to decrease damage severity if the collision happens or even avoid it. The simulation results of selected collision scenarios are presented. Also a brief description of available sensors for this application is shown.
保险公司已经注意到,自1984年以来,在防抱死制动系统(ABS)进入市场的几年后,交通事故及其伤害已经减少。电子学和机械学的发展提高了汽车的碰撞性能。最近,在预防或避免碰撞方面的一些进展被称为主动安全系统,在欧洲被称为高级驾驶员辅助系统(ADAS)。自适应巡航控制系统、变道辅助系统和盲点检测系统都面临着避免碰撞的挑战。本文给出了一个汽车用避碰模型。该系统包括一个车辆动力学模型,该模型是用仿真软件AMESIM开发的。开发了决策函数,以确定物体何时为危险障碍物,这些函数取决于相对速度,以及主车辆与障碍物之间的距离。将车辆模型与决策功能相结合,形成一个避碰系统。如果司机忽视警告,系统会在足够安全的距离向司机发出警告,以避免碰撞,如果发生碰撞,系统会开始刹车,以减少伤害的严重程度,甚至避免碰撞。给出了选定碰撞场景的仿真结果。此外,还显示了用于此应用程序的可用传感器的简要描述。
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引用次数: 12
Research on lane-marking line based camera calibration 基于车道标线的摄像机标定研究
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456361
Kunfeng Wang, Hua Huang, Yuantao Li, Fei-Yue Wang
In this paper, we present a novel camera calibration method which requires only a few easy attainable lane markings in traffic scenes. All we need to know beforehand are a pair of parallel lane markings with known lane width and either the camera height or the length of a land marking parallel to the road. If the camera height is known a-prior, a set of camera parameters such as the focal length, the tilt angle, and the pan angle can be recovered; if the length of a land marking parallel to the road is known a-prior, not only the above camera parameters, but the camera height can also be recovered. We show experimentally that the proposed method is capable of achieving accurate results in most traffic monitoring applications, including inverse perspective transformation and even 3-D estimation of vehicle dimensions.
在本文中,我们提出了一种新的摄像机标定方法,它只需要在交通场景中少量容易获得的车道标记。我们需要事先知道的是一对平行的车道标记和已知的车道宽度,或者是摄像头的高度,或者是与道路平行的陆地标记的长度。如果相机高度事先已知,则可以恢复焦距,倾斜角和平移角等一系列相机参数;如果已知与道路平行的标线长度a-prior,则不仅可以得到上述相机参数,还可以得到相机高度。实验表明,该方法能够在大多数交通监控应用中获得准确的结果,包括反视角变换甚至车辆尺寸的三维估计。
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引用次数: 24
Formal safety verification for TTP/C network in Drive-by-wire system 线控系统中TTP/C网络的正式安全验证
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456390
R. Niu, Yuan Cao, T. Tang
TTP/C is a member of the time-triggered protocol (TTP) family that satisfies Society of Automotive Engineers Class C requirements for hard real-time fault-tolerant communication. As a communication network designed for safety-critical system, it is essential to verify its safety depending on formal methods. We investigate the fault-tolerant and fault-avoidance strategies of TTP/C network used in Drive-by-wire system, with Markov modeling techniques, and evaluate the failure rate subject to different failure modes, taking into account both transit and permanent physical failures. Generalized Stochastic Petri Net (GSPN) is selected to model concurrency, non-determinism properties and calculate Markov model automatically. A model with 157 states and 78 transitions is built. The result of experiments shows that failure probability of TTP/C network in 7-nodes DBW system varies from 10-6 to 10-10 with different configuration. And diagnose mistakes are proved to be a critical factor for the success of membership service.
TTP/C是时间触发协议(TTP)家族的一员,满足美国汽车工程师协会C级对硬实时容错通信的要求。作为面向安全关键型系统设计的通信网络,利用形式化方法验证其安全性至关重要。利用马尔可夫建模技术,研究了线控系统中TTP/C网络的容错和避免策略,并在考虑传输和永久物理故障的情况下,评估了不同故障模式下的故障率。采用广义随机Petri网(GSPN)对并发性、非确定性进行建模,并自动计算马尔可夫模型。建立了一个具有157个状态和78个转换的模型。实验结果表明,7节点DBW系统中TTP/C网络在不同配置下的失效概率为10-6 ~ 10-10。而错误诊断是会员服务成功与否的关键因素。
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引用次数: 1
Vehicle centroid estimation based on radar multiple detections 基于雷达多次检测的车辆质心估计
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456409
Xun Dai, A. Kummert, S. B. Park, U. Iurgel
Automotive radar application is a focus in active traffic safety research activities. And an accurate lateral position estimation from the leading target vehicle through radar is of great interest. This paper presents a method based on the regression tree, which estimates the rear centroid of leading target vehicle with a long range FLR (Forward Looking Radar) of limited resolution with multiple radar detections distributed on the target vehicle. Hours of radar log data together with reference value of leading vehicle's lateral offset are utilized both as training data and test data as well. A ten-fold cross validation is applied to evaluate the performance of the generated regression trees together with fused decision forest for each percentage of the training data. As a result, compared with the current approach which calculates the mean of lateral offset, the regression tree and decision forest approach yield more accurate position estimation of the lateral offset from a single leading target vehicle with radar multiple detections.
汽车雷达的应用是当前交通安全研究的热点。通过雷达准确估计前方目标车辆的横向位置是非常重要的。本文提出了一种基于回归树的方法,利用有限分辨率的远程前视雷达,在目标车上分布多个雷达探测点的情况下,估计前方目标车辆的后质心。在训练数据和测试数据中,利用雷达记录的小时数和领先车辆的横向偏移参考值。应用十倍交叉验证来评估生成的回归树和融合决策森林对每个百分比的训练数据的性能。结果表明,与目前计算侧向偏移均值的方法相比,回归树和决策林方法可以更准确地估计雷达多次探测下单个领先目标车辆的侧向偏移位置。
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引用次数: 3
Slip ratio control for a semi-track air-cushion vehicle 半履带气垫车辆的滑移比控制
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456374
Xu Shuo, Luo Zhe, Yu Fan, Zhou Ke, Zhang Yongchao
Based on the analyses of the resistances and driving force for a semi-track air-cushion vehicle (STACV) operating in severe working conditions, the theoretical models for traction efficiency and total power consumption are established, and the relationships between slip ratio and traction efficiency, total power consumption are examined respectively. In different speed conditions, the control targets are selected correspondingly. For example, in the present study, maximizing traction efficiency and minimizing total power consumption are selected as control targets respectively in starting acceleration case and uniform velocity case. A slip ratio control system with a fuzzy PID controller is designed to achieve the control targets by regulating driving torque for the semi-tracks' driving wheels. In MATLAB/Simulink software environment, simulations are carried out to examine the proposed control system in different operating conditions including a level and a ramp terrain cases. Simulation results show that the optimal operation state can be obtained and maintained by using the designed control system.
在分析半履带气垫车(STACV)在恶劣工况下的阻力和驱动力的基础上,建立了牵引力效率和总功耗的理论模型,并分别考察了滑移率与牵引力效率、总功耗的关系。在不同的转速条件下,选择相应的控制目标。例如,在本研究中,在起动加速工况和匀速工况下,分别选择牵引效率最大化和总功耗最小作为控制目标。设计了一种模糊PID控制系统,通过调节半履带驱动轮的驱动转矩来达到控制目标。在MATLAB/Simulink软件环境下,对所提出的控制系统在不同的工作条件下进行了仿真,包括水平和斜坡地形情况。仿真结果表明,所设计的控制系统能够获得并保持最优运行状态。
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引用次数: 1
System-On-a-Chip design of electronic control unit for car body control 车体控制电子控制单元的片上系统设计
Pub Date : 2007-12-01 DOI: 10.1109/ICVES.2007.4456362
Li Hong-qiang, Miao Chang-yun, Wang Hua-ping
Increasing demand for dynamically controlled safety features, passenger comfort, and operational convenience in automobiles requires an intensive use of electronic control units. This paper presents an efficient System-On-a-Chip implementation of the electronic control unit (ECU) for car body control. The ECU includes a CPU and basic functions like SRAM and clock generator. With the flexibility of an FPGA, the ECU can be adopted to any available bus like CAN, LIN, FlexRay or a proprietary bus without changing the system architecture and adding additional external components. To improve the individual response time and to escape from some eventual trapped-function loops, High/Low ports of the ECU are simply used, which increases the stability of the actuator modules. A soft processor core optimised for FPGA is used as system controller and also as host controller for CAN. The proposed implementation has been developed by using the hardware description language, and has been synthesized placed and routed in an Altera FPGA device. Using FPGA, cost of the new ECU can be kept low, making the new car body control system affordable for customers and thus improving operational convenience.
汽车对动态控制的安全特性、乘客舒适度和操作便利性的需求日益增长,这就要求大量使用电子控制单元。本文提出了一种高效的汽车车身电子控制单元(ECU)的片上系统实现方案。ECU包括一个CPU和基本功能,如SRAM和时钟发生器。凭借FPGA的灵活性,ECU可以采用任何可用的总线,如can, LIN, FlexRay或专有总线,而无需改变系统架构和添加额外的外部组件。为了提高单个响应时间并避免一些最终的陷功能循环,ECU的高/低端口被简单地使用,这增加了执行器模块的稳定性。采用针对FPGA优化的软处理器内核作为系统控制器,同时也作为CAN的主控制器。采用硬件描述语言开发了所提出的实现,并在Altera FPGA器件中进行了合成、放置和路由。通过FPGA的使用,新型ECU的成本可以保持在较低水平,使新的车身控制系统为客户所负担得起,从而提高了操作的便利性。
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引用次数: 2
期刊
2007 IEEE International Conference on Vehicular Electronics and Safety
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