非线性控制系统综合的频域逆系统方法研究

Study on the Synthesis of Nonlinear Control Systems Based on Inverse System Method in Frequency Domain

提出一种不需已知系统微分方程模型的非线性系统综合方法。首先得到对象非线性传递函数的估计 ,然后利用非线性补偿算法构造前馈补偿器 ,使复合系统具有近似线性系统的特性 ,最后采用常规线性系统反馈控制的方法进行控制。仿真结果表明 。

A new strategy for thd synthesis of nonlinear systems was proposed. The differential equation model of the plant was not needed. First, the estimation of nonlinear transfer functions of the plant was obtained. Then a feed forward compensator was constructed by using a nonlinear compensating algorithm, which made the composite system worked rather like a linear system, so that it can be easily controlled by using common control methods for linear systems. Simulation results show that the proposed method is more effective than the regular adaptive control methods for nonlinear systems.