基于模型的汽油机电子节气门控制器设计

摘要： 建立了电子节气门系统模型，并通过系统辨识方法得出模型参数.根据被控电子节气门的摩擦力和非线性回位弹簧模型，设计了前馈非线性补偿控制器.将经过前馈非线性补偿后的电子节气门系统简化成线性系统，并对该线性系统进行H无穷控制器的设计.对设计的H无穷控制器进行离散化，并加入比例控制环节来弥补控制器离散化导致的性能下降.经过试验验证，在前馈非线性补偿器、H无穷控制器和比例控制的作用下，被控电子节气门的性能达到了设计需求.

Model-Based Controller Design for an Electronic Throttle of Gasoline

Abstract： Electronic throttle is a key actuator of the gasoline engine. Due to the effects of frictions and the nonlinear return spring, the throttle control system design is difficult. In this paper, an electronic throttle system model was constructed and system parameters were identified through the system identification method. Then, a feedforward compensation controller was designed based on the model of friction and nonlinear return spring. And an H infinity controller was designed based on the compensated system which was modeled as a linear system. After that, the H infinity controller was discretized for implementation. Because of the controller discretization, the performance of the H infinity controller declined slightly, and, therefore, a proportional control was added to improve the control performance. Finally, experimental verification was conducted which showed that the designed electronic throttle control system could meet the design requirements.