基于鲁棒控制的超轻度混合动力汽车传动系统控制策略

Control strategy of super mild hybrid electric vehicle drive system based on robust control

对金属带式无级变速CVT的工作原理进行了分析,推导出其动力学方程,利用基于鲁棒性的控制器对CVT中的车速和发动机转速控制目标进行控制,并在Matlab下构建控制模型,在硬件在环试验台下进行仿真。仿真结果表明:基于鲁棒性的PID控制算法是有效的,可通过调节目标系统夹紧力和实际系统夹紧力之间的差值,大幅度提升传动系统的稳定性以及响应速度,并且可以明显改善整车的加速性能和缩短制动时间。

The principle of the metal belt type continuously variable CVT is analyzed to derive the kinetic equation of it. The vehicle speed and engine speed are used as target by a robust controller for the CVT controlling and the control model in the Matlab is established to realize the simulation in the hardware in the loop test bench. The simulation results show that the robust PID control algorithm is effective, which can greatly improve the system stability, response speed, dynamic charac- teristics and so on, and can also improve the accelerated performance significantly and reduce the brakinz time.