模糊自适应滑模控制研究

针对传统滑模变结构控制器(SMC)的抖振现象,提出了一种模糊自适应滑模控制方法.该方法采用模糊逻辑系统来代替传统的SMC中不连续的控制信号,以削弱其由于不连续切换引起的抖振.另外,为了补偿实际应用中系统的不确定性,给出了相应的自适应算法,以调节模糊系统的参数,并给出了算法的Lyapunov稳定性证明.最后,通过对一个感应电机位置控制的数值仿真计算,验证了方法的有效性.

Research of an Adaptive Fuzzy Sliding-mode Control

An adaptive fuzzy sliding-mode control strategy is presented to remedy the chattering phenomenon on conventional sliding-mode controller(SMC).A fuzzy logic system is utilized to approximate the discontinuous control signal,then the chattering phenomenon in classical SMC caused by discontinuous signal switching can be effectively alleviated.Moreover,an adaptive algorithm with a stability proof using Lyapunov theory is utilized to compensate for the uncertainties existed in practical systems by adjusting the fuzzy parameters.Finally,a numerical simulation for position control in an induction motor is provided to demonstrate the effectiveness of the proposed approach.