自动变速车辆低附着路面牵引力控制研究

摘要

A new traction control system for automatic transmission vehicle is proposed based on concerted control of throttle opening and transmission gear position. In view of the non-linearity and uncertainties of slip ratio control system, the feedback linearization and sliding mode control are applied to the system by means of differential geometry theory. Furthermore, by using dynamic programming, the throttle opening of engine and the gear position of transmission, at which the required driving torque can be produced, are worked out. The simulation results indicate that the traction control system proposed is characterized by its simple structure and good performance.%提出了一种基于发动机节气门开度与变速器挡位协调控制的自动变速车辆牵引力控制系统.针对滑移率控制系统的非线性与参数不确定性,根据微分几何理论对其进行了反馈线性化并施加滑模控制.同时利用动态规划方法求得能产生所需驱动转矩的节气门开度与变速器挡位.仿真结果表明,此种牵引力控制系统具有设计简单和控制效果良好等特点.