飞控-飞机低阶等效系统的在线辨识  

Online Identification of Low-Order Equivalent System of Flight Control and Aircraft System

作　　者：杨凌宇[1] 柳嘉润[1] 申功璋[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《飞行力学》2003年第2期27-30,共4页Flight Dynamics

摘　　要：以飞控 -飞机低阶等效系统为背景 ,采用 Taylor展开法研究了带纯延迟环节的二阶系统的在线辨识。采取了对低信息点进行抛弃 ,变步数起动等算法对传统的最小二乘法加以改进 ,大大减少了辨识过程中产生的误差 ,更适合于实时辨识。实际应用结果表明 :该方法可以有效地对具有时变特性的带纯延迟的非线性系统加以辨识 。This dissertation is based on the low order equivalent system of the flight control and aircraft system. Taylor series expansion is used to solve the online identification of two order linear system with delay time. And some measures, such as discard the useless sampling data and unfixed pace for startup, are studied in order to improve the least square method. The error is reduced and the new method shows good characteristics in real time identification. Simulation result proved that this method can solve the identification of delay time system and the precision of the parameters is satisfactory.

关 键 词：飞机控制系统 在线系统辨识 低阶等效系统 最小二乘法 Taylor展开法 

分 类 号：V249.1[航空宇航科学与技术—飞行器设计]