【摘要】 针对客车在转弯或有侧向干扰时的制动稳定性分析中存在气制动系统建模非线性误差和实车实验模拟困难、危险性大等问题,采用硬件在环仿真测试技术设计一套客车整车制动稳定性仿真测试系统。首先搭建客车气制动系统的硬件实物平台,运用Matlab/Smulink建立转弯时的车体、轮胎、制动器的仿真模型,采用Matlab/x PC的实时数据采集技术对客车制动时的制动气室输出力进行数据采集,并实时反馈至车辆动力学仿真模型。系统对客车转弯时及有侧向力影响下的制动稳定性进行测试分析,试验结果表明:系统采样频率为1 k Hz,输出力分辨率为10 N,可以直观地显示车辆的制动过程及结果,能够很好地对客车制动稳定性能进行测试分析,为国内客车整车制动性能的提高提供一个良好的研究平台。更多还原

【Abstract】 A simulation testing system for whole-bus braking stability is designed to solve the problems in brake stability of buses turning a corner or encountering side lateral interferences,such as modeling nonlinear errors in air brake systems or difficulties and dangers in real vehicle experiments, according to hardware-in-the-loop data acquisition technology. First, a physical hardware platform is built for air brake system. Second, simulation models for vehicle, tire and brake are respectively established via Matlab/Smulink. Third, the output force of the brake chamber is collected by means of Matlab/x PC real-time data acquisition technology and further fed back to dynamical simulation models. This system is applied to test the brake stability of the bus turning a corner or under the influence of lateral interferences. According to the test results,the sampling frequency and output force resolution of the system are 1 k Hz and 10 N respectively. With this system, the braking processes and results have been visually displayed and the braking stability performance have been better tested and analyzed. It has provided a good research platform for improving the braking performances of home-made buses.更多还原