模糊-变结构控制在汽车发动机转速控制中的应用

变结构控制具有良好的鲁棒性,但是在实际应用中往往会引发抖振．本文采用模糊一滑模变结构的控制方法,解决滑模变结构控制在汽车发动机转速控制中出现的转速抖振现象．首先,在变结构控制变量的基础上引入模糊控制分量;其次对模糊控制分量进行了设计、计算;最后利用MATLAB软件进行了计算机仿真．仿真结果表明发动机转速抖振幅度只有原来的10％,控制变量的切换频率只有原来的15％左右．

Application of Fuzzy-SMC in Automotive Engine Speed Control

The sliding mode control is a robust control design method, but chatterings sometimes occur in applications. This paper used a fuzzy-sliding mode control to improve the stability of automotive engine speed. Firstly,the fuzzy control vectors are introduced to the total control vectors. Secondly, the design strategy for the fuzzy control vectors was presented.Finally, simulations were done with MATLAB.The simulation results show that engine speed chattering swing is reduced to 10% and the chattering frequency is reduced to 15%.