利用报警灯判断桑塔纳2000GSI型轿车ABS故障

为了提高汽车的制动效能,确保汽车制动时方向的稳定性,桑塔纳2000GSI型轿车的制动装置采用了制动防抱死系统(ABS)。随着车辆行驶里程的不断增加,制动防抱死系统的故障会日渐趋多,因此如何正确地判断制动防抱死系统故障,已成为安全使用该型车的当务之急。     

基于Matlab的汽车ABS仿真研究

随着汽车运输业的发展和汽车行驶速度的不断提高,汽车行驶的安全性问题越来越得到关注,装有ABS的汽车,在制动时可以极大地提高汽车制动过程中的操纵稳定性。本论文将主要以车辆单轮ABS为例来介绍其控制方法。采用以门限值为参数的控制方法,并用车辆动力学原理和MATLAB/SIMULINK仿真相结合的方法,来分析普通制动系统和装有防抱死制动系统(ABS)车辆制动过程中各参数的动态变化规律。通过仿真计算研究,来证实该控制算法的有效性,为防抱死制动系统的研究提供一套有效的方法。     

汽车防抱死制动系统的使用注意事项

防抱死制动系统简称为ABS。汽车ABS无需进行维护,当车速超过20km/h行驶时,如果防抱死制动系统工作正常,仪表盘上的ABS指示灯就不会发亮;如果ABS指示灯发亮,就说明防抱死制动系统有故障。     

东风EQ1120GA(天锦)型运输车气压ABS控制原理和故障检测

正制动性能是汽车的主要性能之一,直接关系到行车安全。重大的交通事故往往与制动距离太长、紧急制动时发生侧滑等息息相关,装有防抱死制动系统(ABS)的车辆能够很好地保持车辆行驶的稳定性,有效避免紧急制动时侧滑情况的发生。汽车的制动按介质来区分有液压制动方式和压缩空气制动方式,前者多用于轿车,后者多用于客车     

汽车ABS使用须知

ABS称为“防抱死”系统。虽然现代的ABS系统可最大限度地提高制动时车辆的稳定性．但不能防止车轮在所有的情．况下都不发生滑移。在积雪结冰或湿滑的路面上行驶上时，汽车稳定性仍是较差的。在此路面行驶时应减慢车速，小心驾驶。     

汽车制动液与ABS防抱死制动系统

引言 汽车制动液俗称刹车液，它是汽车制动系中传递压力使车轮制动器实现制动作用的液体。汽车的制动性能是汽车的主要性能之一，重大交通事故往往与制动距离过长、紧急制动时发生侧滑等隋况有关，所以汽车的制动性能是汽车安全行驶的重要保障。目前ABS防抱死制动系统已被广泛用于汽车，ABS防抱死制动系统中的制动液的合理选择与使用直接关系到司机的行车安全和生命安全。     

汽车制动系统电子化技术

防抱死制动系统(ABS) 在防抱死制动系统(ABS)出现之前,汽车在紧急制动时四个车轮被完全抱死,这时汽车在轻微侧向力作用下就会发生侧滑、急剧摆动,甚至完全调头;而更加危险的是,当汽车行驶在弯道时,由于前轮抱死,汽车将丧失转向能力,只能沿着惯性方向向前直至停止.     

现代制动控制技术成为汽车的安全屏障

随着人们对汽车行驶安全性的要求越来越高,防抱死制动系统(ABS)、电控制动系统(EBS)及动态控制系统(VDC)已成为当今汽车上的重要安全装置.文章介绍了制动控制技术在现代汽车上的应用和发展,阐述了汽车制动控制系统的功能特点,指出了汽车智能制动控制技术正在向动态控制系统(VDC)发展的原因,以及制动防抱死技术的发展趋势和汽车电控制动技术的发展动向.     

汽车防滑控制系统与动态偏航稳定控制系统

汽车制动防抱死系统ABS及其拓展系统———牵引力控制系统ASR/TCS、动态偏航稳定控制系统ESP是汽车的主动安全系统 ,决定车辆的操纵稳定性和行驶安全性。文中介绍了ABS及ASR/ESP的基本工作原理、国外先进的制动系统EHB和EMB的基本原理与特点及目前国内ABS的技术现状。     

凌志 LS400轿车车辆稳定性控制系统的检修

丰田凌志LS400轿车装备了VSC系统。VSC是英文Vehicle Stability Control的缩写，中文译成“车辆稳定性控制系统”。VSC系统的作用是在汽车高速转弯将要出现失控时，可有效地增加汽车的稳定性，以减少事故的发生。该系统通过对从各传感器传来的车辆行驶状态信息进行分析，向制动防抱死系统     

基于Matlab的ABS不同控制方式的仿真

汽车防抱制动系统（ABS）能实时控制车辆产生最佳的制动力矩,避免产生过大的车轮滑移,从而保持汽车的操纵性和稳定性。文中分别采用PID控制、逻辑开关控制两种方法对单轮汽车模型进行了模拟仿真。然后与没有ABS的情况进行对比,通过对仿真图形曲线的分析,得出ABS的防抱死效果明显。     

液压机械无级变速器速比自抗扰控制研究

本文中设计了一种单行星排液压机械无级变速器,并为提高其速比跟踪控制性能,提出一种带前馈的自抗扰控制算法,以实现速比的跟踪控制.首先建立系统数学模型,通过传动系统转速关系的理论分析,得到前馈控制量,进一步采用自抗扰控制器对速比进行闭环控制.接着建立系统仿真平台和原型样车,通过仿真和试验对设计的带前馈自抗扰速比控制器进行验...     

基于模糊PID的汽车防抱制动系统控制策略的研究

在基于滑移率的ABS控制策略的基础上,建立了11自由度的汽车急转制动仿真模型。提出了一种参数自整定模糊PID控制算法,并采用了Bang-Bang控制和模糊PID控制分别对汽车ABS进行了仿真,其结果表明:模糊PID控制比Bang-Bang控制可以达到更好的效果。     

基于自适应模糊PID控制的ABS仿真研究

在Matlab/Simulink中建立一种两轮的汽车动力模型,以自适应模糊PID和道路识别控制器作为控制模块,通过在高低附着路面和高低附着对接路面进行紧急制动仿真的研究。仿真结果表明道路识别控制器能够快速准确的识别路面不同附着路面最优滑移率,自适应模糊PID控制的ABS相于常规制动性能有了很大程度的提高,具有在线自整定参数的特点,具有很好的稳定性、适应性和鲁棒性。     

A Sliding Mode Controller for Wheel Slip Ratio Control System

A sliding mode controller has been developed for a wheel slip ratio control system for commercial vehicles with sluggish braking actuators to replace conventional if-then rule-like ABS control laws. New techniques overcome the tendency of sliding mode controllers to chatter. Computer simulation (hardware-in-the-loop simulation) and actual vehicle tests verified the effectiveness of this method to suppress chattering and keep the wheel slip ratio in a desirable range during braking on low-friction road surfaces.     

汽车防抱死制动系统控制技术

汽车防抱死制动系统（ABS）可以控制汽车制动时的滑移程度,防止车轮抱死拖滑,提高汽车制动时的操纵稳定性。文章介绍了ABS的基本功能和控制原理,阐述了目前ABS所采用的控制技术及发展方向。指出随着车速传感器技术的发展,基于车轮滑移率的各种控制算法将被广泛重视和采用;将各种控制算法结合起来是ABS控制技术的一个重要发展方向。     

基于横摆力矩的汽车稳定性控制策略

为提高车辆的横向稳定性,获得良好的操纵性能,利用ADAMS/car和MATLAB/simulink建立了以横摆角速度和质心侧偏角为控制变量的多级PID仿真模型,分别采用了单个车轮制动和单侧车轮制动产生附加横摆力矩的方式.通过蛇形试验验证了ESP控制器的有效性和对比了2种制动方式的控制效果.仿真试验表明：采用该ESP控制器可以很好地保持车辆的稳定性,采用单侧车轮制动产生附加横摆力矩的方式具有更快的控制速度和更好的控制效果.     

Wheel slip control with torque blending using linear and nonlinear model predictive control

Modern hybrid electric vehicles employ electric braking to recuperate energy during deceleration. However, currently anti-lock braking system (ABS) functionality is delivered solely by friction brakes. Hence regenerative braking is typically deactivated at a low deceleration threshold in case high slip develops at the wheels and ABS activation is required. If blending of friction and electric braking can be achieved during ABS events, there would be no need to impose conservative thresholds for deactivation of regenerative braking and the recuperation capacity of the vehicle would increase significantly. In addition, electric actuators are typically significantly faster responding and would deliver better control of wheel slip than friction brakes. In this work we present a control strategy for ABS on a fully electric vehicle with each wheel independently driven by an electric machine and friction brake independently applied at each wheel. In particular we develop linear and nonlinear model predictive control strategies for optimal performance and enforcement of critical control and state constraints. The capability for real-time implementation of these controllers is assessed and their performance is validated in high fidelity simulation.     

Lateral handling improvement with dynamic curvature control for an independent rear wheel drive EV

The integrated longitudinal and lateral dynamic motion control is important for four wheel independent drive (4WID) electric vehicles. Under critical driving conditions, direct yaw moment control (DYC) has been proved as effective for vehicle handling stability and maneuverability by implementing optimized torque distribution of each wheel, especially with independent wheel drive electric vehicles. The intended vehicle path upon driver steering input is heavily depending on the instantaneous vehicle speed, body side slip and yaw rate of a vehicle, which can directly affect the steering effort of driver. In this paper, we propose a dynamic curvature controller (DCC) by applying a the dynamic curvature of the path, derived from vehicle dynamic state variables; yaw rate, side slip angle, and speed of a vehicle. The proposed controller, combined with DYC and wheel longitudinal slip control, is to utilize the dynamic curvature as a target control parameter for a feedback, avoiding estimating the vehicle side-slip angle. The effectiveness of the proposed controller, in view of stability and improved handling, has been validated with numerical simulations and a series of experiments during cornering engaging a disturbance torque driven by two rear independent in-wheel motors of a 4WD micro electric vehicle.     

Experimental investigations on continuous regenerative anti-lock braking system of full electric vehicle

Functions of anti-lock braking for full electric vehicles (EV) with individually controlled wheel drive can be realized through conventional brake system actuating friction brakes and regenerative brake system actuating electric motors. To analyze advantages and limitations of both variants of anti-lock braking systems (ABS), the presented study introduces results of experimental investigations obtained from proving ground tests of all-wheel drive EV. The brake performance is assessed for three different configurations: hydraulic ABS; regenerative ABS only on the front axle; blended hydraulic and regenerative ABS on the front axle and hydraulic ABS on the rear axle. The hydraulic ABS is based on a rule-based controller, and the continuous regenerative ABS uses the gain-scheduled proportional-integral direct slip control with feedforward and feedback control parts. The results of tests on low-friction road surface demonstrated that all the ABS configurations guarantee considerable reduction of the brake distance compared to the vehicle without ABS. In addition, braking manoeuvres with the regenerative ABS are characterized by accurate tracking of the reference wheel slip that results in less oscillatory time profile of the vehicle deceleration and, as consequence, in better driving comfort. The results of the presented experimental investigations can be used in the process of selection of ABS architecture for upcoming generations of full electric vehicles with individual wheel drive.