一类非线性不确定系统的自适应模糊滑模控制设计

针对一类含非匹配不确定项的非线性系统提出一种自适应模糊滑模控制方法.构造线性切换面确保滑动运动稳定,利用趋近律构造理想控制,用监督控制确保系统状态有界,用模糊逻辑系统逼近其连续项,用补偿切换项来消除逼近误差,该方法有效的结合了自适应模糊控制和滑模控制的优点,控制器构造简单,稳定条件弱,控制性能好.仿真结果也证明了此方法的有效性.

Adaptive Fuzzy Sliding Mode Control for a Class of Nonlinear Uncertain Systems

An adaptive fuzzy sliding mode control method for a class of nonlinear systems with unmatched uncertainties is presented. In this paper, a switching surface is constructed to ensure the sliding mode motion stable, a reaching law is used to construct ideal controller, a fuzzy logic system is used to approximate its continuous terms, a compensated term is used to compensate the approximative error. It is proved that the proposed method efficiently combines the advantages of adaptive fuzzy slide controller and the sliding mode controller. The designed controller is simple, the conditions of stability is weak and the properties of controller is better. Simulation results demonstrate the effectiveness of this method.