天然气发动机怠速鲁棒控制

Idle Speed Control of CNG Engine Based on Robust Control Theory

将H∞鲁棒控制理论应用于天然气(CNG)发动机的怠速控制,建立了CNG发动机动力学模型,描述了发动机的不确定性。应用Matlab鲁棒控制工具箱,设计出基于H∞理论的CNG发动机怠速控制器,并进行了仿真分析和试验。仿真和台架试验表明,H∞控制具有很好的鲁棒性,提高了CNG发动机怠速工况的稳定性。

The basic methods of H-infinity control theory and model of standard H-infinity design problem were described. The H-infinity robust control theory was applied to the design process of CNG engine idle speed control. The dynamic model of CNG engine was established. The diagram of engine uncertainty was stated. A controller of CNG engine idle speed was successfully developed based on H-infinity control theory and Matlab robust toolbox. The simulations and experiments about the CNG engine were done and the results show that the H-infinity controller possesses good robust features and can improve the stability of CNG engine idling operation.