非仿射非线性系统的自适应模糊输出反馈控制

针对一类单输入单输出非仿射非线性系统,提出了基于观测器的自适应模糊输出反馈控制。该算法通过构造线性误差观测器估计系统输出误差和系统状态,利用估计状态变量和估计输出误差变量设计自适应控制律,采用模糊逻辑系统在线消除非线性系统中的不确定模型,引入监督控制消除系统逼近误差和外界干扰,并利用Lyapunov方法严格证明了在该控制律作用下闭环系统所有信号一致最终有解,闭环系统的输出能最终跟踪期望输出。仿真结果表明了该方法的有效性。

Adaptive output-feedback fuzzy controller for non-affine nonlinear systems

This paper presents a direct adaptive output-feedback fuzzy controller for a class of single input single output unknown non-affine nonlinear systems.A linear error observer is employed to estimate output errors and states,an adaptive controller is designed by using observed errors and state variables.A fuzzy logic system is employed to approximate unknown plant nonlinearity.A supervisory control is introduced to compensate the approximation error and disturbances.The overall adaptive scheme guarantees that all signals involved are bounded and the output of the closed-loop system will asymptotically track the desired output trajectory,Simulation results demonstrate the effectiveness and performance of the proposed approach.