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设计了一个H∞变论域模糊控制器,用于控制一类单输入单输出的基于Preisach模型的未知迟滞非线性系统.该控制器将H∞控制与模糊控制结合起来,提高了H∞控制的智能性和模糊控制的鲁棒性.通过Lyapunov方法,证明了闭环控制系统是稳定的.该控制系统中模糊逻辑逼近误差和外部扰动误差都能通过调节权重因子被限定在一个给定范围内.最后,给出了关于未知迟滞非线性系统的仿真结果,表明了控制方案的可行和有效性.
An H ∞ variable universe fuzzy controller is designed to control a class of single input single output based on Preisach model for unknown hysteresis nonlinear systems.The controller combines H∞ control and fuzzy control to improve the H∞ control And the robustness of fuzzy control.The closed-loop control system is proved to be stable by Lyapunov method.The fuzzy logic approximation error and external disturbance error can be limited within a given range by adjusting the weight factor Finally, the simulation results of the unknown hysteresis nonlinear system are given, which shows the feasibility and effectiveness of the control scheme.