驾驶模拟器防抱制动系统(ABS)课程毕业设计外文文献翻译@中英文翻译@外文翻译

Driving Simulator Anti-lock Brake System (ABS) With the increase of the vehicle velocity and augment of the running vehicles density on the road,the requirement which people want about the performance of running vehile for securith is higher and higher. Anti-lock Brake System (ABS) makes an essential contribution to the traffic safety for it ensures optimal stability, steerability and stopping distance during hard braking. ABS has been widely used since the mid of 1980s and has become a standard assembled part in the middle and top grade cars. There are many kinds of control algorithms of ABS,.But,in the present, The utility and effective control logic on the vehicle is logic limit values. As a rual, we carry out the simulation research by the snigle computer, plot the simulation curve applying pure simulated data, and analyse them while researching the Anti-lock Brake System. So it is bad considering the real-time performance and simplex for the judgement and appraisement. The driving simulator of ADSL in JiLin university is the great test equipment device for Simulationn research and exploitation about active safety performance for the vehicle. It is distinguished either from a pure numerical simulator or a pure physical model, or from a simulator for driver training purposes. It can make the driver who is the most difficult for modeling in mathematical and computer forms, participates in the test directly, add to all sorts of accutate dynamics models that are exploited on the driver simulator, so the test done on it is closer to the practical test, in some hand, it can agree about 90% with the true vehicle test. Whats more,it can give the driver the visual, audio, kinematics senses and tactile impression. So ,it has many merits with which the pure simulation test can not compare. Add to the test carried out in the ADSL development driving simulator is safe, either for a professional test driver or for an ordinary driver. The limit operating conditions, such as in the cases of slip, rear wheel slip or losing control at high speed, can be tested safely. So, it is significant to develop the control system that is used to the vehicle, the whole car and assess the vehicle performance applying the driving simulator. In this paper, we researched and exploited the Anti-lock Brake System utilizing the driving simulator of ADSL, based on the analysis of basic control strategy about ABS logic limit values control, established the ABS control model, including hydraulic system model,arrester model and pressure model between the brake pedal and the master cylinder, ect. After interfacing the simulator, through the test on the simulator, the validity of control logic is verified, and by analizing the test result, found the experiences and the rule about adjusting the control parameters of ABS. Specifically, the following research steps have been completed: First, in theory, the basic principle and contruction of ABS are introducd, then, analyzed and compared the merit and the deficiency of each control method, established the design rule of ABS control logic. Second, based on comparing several familiar ABS control logic, analyzed basic control strategy about ABS logic limit values control, established the ABS control model, including hydraulic system model,arrester model and pressure model between the brake pedal and the master cylinder, ect. After interfacing with the simulator, carried out the test on the simulator. Third, identified the road coherence coefficient. Because of the diversity of the road friction conditions that the vehicle encounters while braking, and the difference of the ideal slippage rate is very great on different fricton coefficient road, in order to ensure the work of ABS is normal, and ABS can make good use of the maximal road coherence coefficient that each road can provide, it is necessary to adjust different control logic and strategy according to the different road condition. So, it is essential to identify the road condition. In this dissertation, based on the hydraulic system model, the changing characteristics of hydraulic system are studied, then the relations among hydraulic pressure, the change of wheel angle acceleration and tire-road friction are analyzed. And through identification, found the relation between the change of wheel angle acceleration and tire-road friction. Finally, the limit values of the control logic are analized, and research the influence that each limit brings forth to the control system. After analizing the test result, we draw conclusions about the influence degree that each control parameter brings forth to braking performance, and search after the experiences and rule through which the control parameters are adjusted, so that it provide the instruction while matching the ABS for the new vehicle type in the future. The Anti-lock Brake System model which is built in this dissertation can be applied on the silulator of ADSL, and the adjustment experiences to each control parameter which are drawed in the thesis are greatly helpful for matching ABS to the new vehicle type later.Besides , it will provide the console and experiences while exploiting other control systems used in the vehicle by Driving Simulator in the future. 驾驶模拟器 防抱制动系统 (ABS) 随着汽车行驶速度的提高及道路行车密度的增大 ,人们对汽车行驶安全性能的要求也越来越高 .防抱制动系统 (简称 ABS)能够最大限度地保证车辆紧急制动时的 操纵稳定性和制动性能 ,从而较大地提高了行车安全性 .自八十年代中 ,后期以来 ,ABS 得到了广泛而迅速的普及 ,在汽车发达国家 ,ABS 已经成为中 ,高档轿车的标准装配部件 .ABS 控制逻辑种类较多 ,但目前车辆上比较实用且有效的控制逻辑为逻辑门限值控制 .在研究制动防抱控制系统时 ,一般的方法是在微机上进行仿真研究 ,应用单纯的仿真数据绘制成仿真曲线来进行分析 ,实时性差并且判断 ,评价较单一 . 吉林大学国家汽车动态模拟试验室的驾驶模拟器是对汽车主动安全性能等进行仿真研究和开发的大型实验装备 ,它既不同于在计算机上进行的纯数字仿真 ,又不同于台架或场地试验等纯实物物理模拟 ,它可以让难以用数学模拟加以描述的驾驶员直接参与试验 ,加上模拟器上开发出的各种精确的动力学模型 ,使得试验更接近于实车试验 ,在某些方面可以与实车试验高达 90%的吻合度 ,并且它可以给驾驶员良好的视觉 ,听觉 ,触觉及运动感觉 ,因而它具有许多纯仿真试验无法比拟的优势 ,又由于在驾驶模拟器上可以对多种实车难以完成的极限工况进行试验 ,因此 ,驾驶模拟器在开发车用控制系统 ,整车产品开发及性能评价上具有极为重要的作用 . 本文利用实验室的驾驶模拟器对制动防抱系统进行了研究和开发 ,在分析ABS 逻 辑门限值控制的基本控制策略后 ,建立了具有防抱死制动控制性能的 ABS控制仿真模块 ,包括 ABS 控制逻辑模块 ,液压系统模块 ,制动器模块以及制动踏板与制动主缸间的压力模型等 .在将上面所有子模块进行包装成对外仅有输入输出接口的独立模型后 ,与驾驶模拟器进行连接 ,然后在模拟器上进行试验分析 .通过模拟器试验 ,验证了控制逻辑的正确性 ,并对路面附着状况进行了识别 ,通过辨识找到了车轮角加速度变化与路面附着系数之间的关系 .通过试验结果分析 ,找到了 ABS 控制参数进行调整的经验和规律得出了一些对控制参数进行调控的经验和规律 .并且 ,本文 所开发的制动防抱系统可以应用于驾驶模拟器上 ,从而使驾驶模拟器的动力学模型得到了进一步的完善 . 具体开展了以下几个方面的研究工作 : 首先 ,从理论上介绍了汽车制动防抱死系统控制的基本原理和结构 ,并分析 ,比较各种控制方法的优劣 .在此基础上确定所开发系统的基本控制方式