基于Simulink的电子节气门控制策略开发

Development of Electronic Throttle Control Strategy by Using Simulink

针对车用电子节气门的非线性特征,提出了带复位弹簧和摩擦补偿器的PID控制策略。先分析电子节气门的物理特性,根据此特性使用Simulink建立了物理模型和控制策略模型,并进行模型仿真和参数初步整定,然后使用Simulink的Embedded-Coder工具将控制策略模型自动生成C代码,集成到自主开发的ECU中,最后在硬件在环仿真系统和实际车辆上对控制代码进行实际验证,结果表明该控制策略可以取得良好的动态控制效果,满足实际车辆的要求。

In this paper we present a PID controller with limp-home spring and friction torque compensator in response to the nonlinear characteristic of the electronic throttle body. At first the physical characteristic of the throttle body is analyzed and the electronic throttle model and the PID control model are established. Based on the simulation result using the two models,the control parameters of the strategy are fixed. Then the control model is transformed to C code automatically using the Simulink Embedded-Coder toolbox. The throttle control code is integrated and burned into ECU. Through Hard-Ware-Inloop simulation and the real vehicle test,the above control strategy is manifested to have good dynamic performance of throttle control, and can be used to the vehicle.