车辆起-停巡航控制系统的加速度跟踪控制

Acceleration tracking control of Stop and Go cruise control systems

针对低速行驶工况下的车辆StopandGo(起停)巡航控制系统,在研究其加速度动态响应非线性特性的基础上,设计了一种基于滑模变结构控制(SMC)的模型匹配控制器,该控制器综合了SMC的鲁棒性及模型匹配控制(MMC)快速响应的优点。通过仿真计算,结果表明该控制器不但能有效提高车辆在低速工况下加速度的快速跟踪性,而且还改善了系统对外界干扰的鲁棒性能。

A model matching control (MMC) controller based on sliding mode control (SMC) method was developed for longitudinal acceleration tracking control in a Stop and Go vehicle cruise control system. The nonlinearities of the vehicle acceleration response at low-speeds were incorporated into a nominal trans-function model of the vehicle longitudinal dynamic system. The nominal trans-function model was then incorporated into the MMC controller, which included an SMC feedback compensator, the controller combines the advantages of the two control methods to provide robustness and rapid response. Simulations show that the controller not only enhances the vehicle acceleration tracking capability compared with conventional MMC controllers based on the PID method, but also improves the system's robustness at low-speeds.