汽车ABS系统传导瞬态抗扰度性能研究

研究某型号ABS系统的瞬态抗扰度性能,分析试验过程中该ABS系统出现的失效状态和毁坏状况产生的原因,并给出了整改措施。对整改后的ABS系统再次进行试验,结果表明,整改后的ABS系统完全满足ISO7637—2最高等级的要求。     

新型液压ARS系统的道路试验研究

对自主开发的汽车液压防抱制动系统(ABS)按国家标准进行了实车道路试验研究工作，并与德国BOSCH公司的ABS5．3系统进行了性能对比试验。     

不同路面下汽车ABS仿真检测研究

进行不同路面下汽车ABS性能仿真检测,开发了汽车ABS性能仿真检测系统,对ABS的ECU进行了几种典型路面下的仿真检测,并对试验结果进行分析.结果表明开发的ABS性能检测系统具有良好的路面仿真功能与测试功能,可以用于ABS ECU生产的在线检测.     

多功能气压ABS开发测试系统的设计与应用

为快速开发具有自主知识产权的气压ABS系统,设计了多功能气压ABS开发测试系统。利用该系统,可以完成ABS电磁阀的性能测试、ABS实时混合仿真、道路试验数据再现与加工、气制动系统气压动态特性研究、ABS故障模拟和ABS性能评价等工作。使ABS开发工作由传统的道路试验为主转变为以室内台架试验为主,提高了安全性和经济性。     

汽车防抱死制动系统试验研究

首先对ABS的作用做了较详细的介绍，然后重点对ABS试验方法和评价方法做了较详细的论述。本文对ABS的性能评价是以装车后进行实车道路试验的方式进行的，在评价方法方面，文章提出了利用多个参数来对ABS系统进行综合评价，该理论不仅适用于ABS产品的认证，更适用于ABS产品的研究及开发。     

汽车ABS控制策略设计与硬件在环试验验证

针对汽车防抱死制动系统ABS控制的研究,论文从实车应用角度提出了一种新型ABS控制策略。控制策略以滑移率为主要控制目标,以车轮角加速度为辅助控制目标进行了逻辑门限值控制,基于电控制动系统硬件在环试验平台,利用Car Sim与Matlab/Simulink搭建整车仿真模型并编写ABS控制策略程序,选取车辆模型和高速对开路面紧急制动仿真试验工况进行硬件在环试验验证。试验结果表明:设计的新型ABS控制策略具有良好的制动效能且提高了制动时的方向稳定性。     

乘用车ABS系统冰雪路面试验方法研究

ABS作为在汽车制动过程中最重要的部件,发挥了极其重要的作用。目前国内标准法规的试验方法都是针对常规试验场的高附着或低附着道路的路面条件,对于乘用车在冰雪路面这一类附着系数极低的路面工况下没有系统的测试方法。结合现有的ABS系统试验方法以及冰雪路面场景的实际情况,提出合适的乘用车ABS冰雪路面试验方法,最后进行实车试验对方法进行验证。文章通过乘用车ABS系统冰雪路面试验方法研究,填补乘用车在冰雪路面等极端工况下道路试验方法的空白。     

汽车ABS系统故障分析

为了解决某车型ABS系统故障问题,首先介绍ABS系统组成,针对故障现象进行原因分析,给出解决方案,最后通过试验证明解决方案的有效性,为后续车型ABS系统故障的分析提供经验。     

汽车ABS控制器集成开发系统的研究

介绍了自行开发的ABS电子控制器的集成开发系统,在该环境体系中能够进行大量的多功能的纯仿真和实时硬件闭环模拟试验,且各模拟试验采用了一体化的系统,从而缩短了ABS控制器的开发周期,并保证了产品的可靠性。     

防抱制动系统液压控制单元性能试验研究

为探讨控制汽车防抱制动系统(ABS)液压控制单元产品质量的有效手段,在设计研制ABS液压控制单元性能测试试验台的基础上,针对国内某型液压ABS产品进行性能试验研究,根据试验数据分析ABS电磁阀和液压控制单元的性能参数,定量测试评价ABS产品性能指标.     

汽车纵向行驶安全报警系统开发

在介绍现代汽车主动避撞系统的基础上，设计了一个汽车纵向行驶安全报警系统，研制了系统相关硬件及安全报警软件，在此基础上，通过实车试验对车头时距报警算法和驾驶员预估报警算法进行了比较分析，证明了所开发系统的有效性。     

汽车空调整车环境模拟系统的仿真

建立了汽车空调整车环境模拟系统的数学模型,并在M ATLAB S/IM ULIN K软件平台上开发了汽车空调整车环境模拟系统的仿真模块库。简单介绍了所开发的仿真模块库,并用此仿真模块库对某汽车空调整车环模系统进行了仿真研究。与试验结果对比表明,所开发的仿真模块库具有很高的仿真精度。     

Modelling and Control of an Automated Vehicle

We present a vehicle model that includes the vehicle dynamics and a vehicle tire model. The model developed is then used for conducting steering analysis of an automated vehicle. We test the developed model on a step lane change maneuver and propose a model-reference based controller for remote control of a vehicle. Stability analysis of the closed-loop system using die Lyapunov approach is included.     

基于Woodward ECM的重型载货汽车电器系统的开发

介绍笔者2010年6月在陕汽开发的一款装配潍柴动力LNG(Liquid Natural Gas)发动机的重型载货汽车电器系统.该系统的主要特点是:以伍德沃德(Woodward)公司的气体机电控单元升级版本(OH2.0 PCM128-HD)的主要功能为背景,根据重型载货汽车的主要特点,选用其中适合重型载货汽车的功能进行开...     

Integrated control of ground vehicles dynamics via advanced terminal sliding mode control

An integrated vehicle dynamics control (IVDC) algorithm, developed for improving vehicle handling and stability under critical lateral motions, is discussed in this paper. The IVDC system utilises integral and nonsingular fast terminal sliding mode (NFTSM) control strategies and coordinates active front steering (AFS) and direct yaw moment control (DYC) systems. When the vehicle is in the normal driving situation, the AFS system provides handling enhancement. If the vehicle reaches its handling limit, both AFS and DYC are then integrated to ensure the vehicle stability. The major contribution of this paper is in improving the transient response of the vehicle yaw rate and sideslip angle tracking controllers by implementing advanced types of sliding mode strategies, namely integral terminal sliding mode and NFTSM, in the IVDC system. Simulation results demonstrate that the developed control algorithm for the IVDC system not only has strong robustness against uncertainties but also improves the transient response of the control system.     

基于模糊综合评判的汽车动力系统匹配方案优选

利用模糊综合评判方法确定了汽车动力系统匹配目标,依据匹配目标和零部件资源,并考虑相关传动系统参数的重新设计开发确定了8种匹配方案。利用CAE车辆性能仿真软件对8种方案进行模拟计算,采用多因子加权分值评价法优选匹配方案试制出样车,并进行了道路试验。结果表明,优选方案的整车综合性能良好,燃料经济性突出,可满足市场需求。     

Dynamics of Automated Guideway Transit Vehicle with Single-axle Bogies

Summary The steering type of a mechanical guidance system has been used for Automated Guideway Transit (AGT) system in Japan. Recently, the single-axle bogie system has developed for AGT vehicle and applied to Yurikamome 7200 type vehicle. This paper describes dynamic characteristics of AGT vehicle with single-axle bogies. Introducing a nonlinear, 15 degree-of-freedom dynamic model, a computer simulation study on the lateral motion of the AGT vehicle with single-axle bogies are carried out. In order to show the dynamic characteristics of the single-axle bogie clearly, it is compared to that of the AGT vehicle with conventional steering system. The simulation study with actual vehicle parameters shows that single-axle bogie has suitable characteristics for AGT system. The multi-body dynamics modeler, DADS, is used to build the dynamic model of AGT vehicle with single-axle bogies and this is used to demonstrate the vehicle motion in actual guideway. Obtained results are compared to that of the field test. It is shown that the vehicle dynamic response can be obtained in realistic situation by using multibody dynamics code, that is useful for designing both vehicle and guideway.     

Dynamics of Automated Guideway Transit Vehicle with Single-axle Bogies

Summary The steering type of a mechanical guidance system has been used for Automated Guideway Transit (AGT) system in Japan. Recently, the single-axle bogie system has developed for AGT vehicle and applied to Yurikamome 7200 type vehicle. This paper describes dynamic characteristics of AGT vehicle with single-axle bogies. Introducing a nonlinear, 15 degree-of-freedom dynamic model, a computer simulation study on the lateral motion of the AGT vehicle with single-axle bogies are carried out. In order to show the dynamic characteristics of the single-axle bogie clearly, it is compared to that of the AGT vehicle with conventional steering system. The simulation study with actual vehicle parameters shows that single-axle bogie has suitable characteristics for AGT system. The multi-body dynamics modeler, DADS, is used to build the dynamic model of AGT vehicle with single-axle bogies and this is used to demonstrate the vehicle motion in actual guideway. Obtained results are compared to that of the field test. It is shown that the vehicle dynamic response can be obtained in realistic situation by using multibody dynamics code, that is useful for designing both vehicle and guideway.     

新能源汽车动力系统互馈测试平台研究

开发了一种基于互馈结构的新能源汽车动力系统测试平台,可应用于采用串联结构的混合动力汽车、燃料电池汽车以及纯电动汽车.介绍了测试平台技术方案以及车辆动态模拟方法,测试结果表明该平台可真实模拟实际车辆运行工况,满足动力系统匹配开发需求.     

Design of Optimal Four-Wheel Steering System

Optimal design of the four wheel steering (4WS) system of the ground vehicle is studied. 4WS vehicles with the optimal control scheme are considered first. General formulation of the optimal control law is developed based on the linear quadratic regulator theory. The vehicle speed function (VSF) based 4WS vehicle with a simple feedback controller is considered as a special case of the optimal system. Two new designs of the VSF 4WS system are proposed and their performances are compared with the optimal 4WS systems and the existing VSF 4WS system. The first system is designed for the maximum stability while the second system is designed to emulate the response of the optimal 4WS vehicle. Advantages of the new VSF designs are discussed.