一种新的变结构自适应控制方法及其应用研究

本文提出一种新的变结构自适应控制方法，并将其应用于航空发动机控制。这种方法只利用系统输入输出信号，与传统的自适应控制方法相比，具有收敛特性好，对对象的参数变化及未建模动态有很好的鲁棒性，同时其算法简单，易于实现。仿真表明该方法适用于航空发动机控制。

A NEW VARIABLE STRUCTURE ADAPTIVE CONTROL SCHEME AND ITS APPLICATIONS

A new variable structure adaptive control scheme is proposed.The scheme consists of conventional model reference adaptive control and sliding mode control.The adaptive control based on plant's normalized model can match reference model exactly at the design point.The sliding mode control copes with bounded parameter variations and unmodeled dynamics.Signal synthesis is used as adaptive law instead of the conventional integral law.Through introducing linear zone to sliding mode,the chattering phenomenon is eliminated to a great extent.In comparison with conventional adaptive control,the scheme needs only the plant's input-output mesurements,and has superiority in fine convergence,strong robustness to parameter variation and unmodeled dynamics.The simulation results indicate that this scheme is applicable to aero-engine control.