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为解决感应电动机在传统滑模变结构控制中存在动态、稳态性不佳,控制过程中出现的抖振现象,在分析线性滑模面和积分滑模面的基础上,结合两种滑模面的优势,设计了两种滑模面平滑切换新组合滑模面,提高了控制系统的动态、静态品质;同时,将一种多幂次趋近律应用到控制过程中,系统在趋近过程不同阶段,通过对3个幂次项系数进行针对性地调节,使系统的状态在趋近滑模面的全过程中能够拥有较高的速度,并消除了传统滑模变结构所固有的抖振。通过仿真,验证了系统具有较高的鲁棒性和动态性。
In order to solve the problem of chattering in the traditional sliding mode variable structure control of induction motor, the chattering phenomenon appeared in the process of control was analyzed. Based on the analysis of linear sliding mode and integral sliding mode, In this paper, the advantages and disadvantages of the two sliding modes are studied. The new sliding mode surfaces are designed and the new sliding mode surfaces are switched smoothly to improve the dynamic and static quality of the control system. At the same time, a multi-power reaching law is applied to the control process. At different stages of the process, by adjusting the power coefficient of 3 power modules in a targeted manner, the state of the system can have a higher speed in the whole process of approaching the sliding mode surface, and the inherent sliding mode structure is eliminated Chattering. Simulation shows that the system has higher robustness and dynamic.