基于楔形传动的新型电子机械线控制动器设计与分析

Design and Analysis of a New Type of Electro-mechanical Brake-by-wire based on Wedge Transmission

针对无人驾驶车辆所需的线控底盘系统,提出了一种基于楔形传动的新型电子机械线控制动器,并提出了楔形传动角优化设计方法;对该制动器进行了参数设计与三维建模,并在Matlab/Simulink和Adams中搭建了该线控制动系统的联合仿真虚拟样机模型。仿真结果表明,该新型制动器跟踪控制性能良好,紧急制动工况下制动协调时间为0.19 s,制动卸载时间为0.3 s,稳态误差精度为1.2%。相比国家与行业标准以及传统线控液压制动系统,该新型制动器加载卸载速度大幅领先,跟随性能好,适合线控底盘系统使用。

A new type of electro-mechanical brake-by-wire system based on wedge transmission is proposed for driverless vehicle,and the optimal design method of wedge transmission angle is proposed too.The parameters design and three-dimensional modeling of the braking system are carried out,and the joint simulation virtual prototype model is built in Matlab/Simulink and Adams.The simulation results show that the tracking control performance of the new braking system is good.Under the emergency braking condition,the brake coordination time is 0.19 s,the brake unloading time is 0.3 s,the steady state control error is 1.2%.Compared with the national and industrial standards,and traditional hydraulic brake system by wire,the new brake has a large lead in loading and unloading speed,good follow-up performance,and is suitable for the use of the chassis system controlled by wire.