一种抑制反作用轮低速摩擦对卫星姿态扰动的方法  

A Method for Reducing Reaction Wheel Low-Speed Friction Disturbance to Satellite Attitude

作　　者：丁建钊[1,2] 

机构地区：[1]北京控制工程研究所,北京100190 [2]空间智能控制技术国家级重点实验室,北京100190

出　　处：《空间控制技术与应用》2008年第2期55-58,64,共5页Aerospace Control and Application

基　　金：国家自然科学基金(60034010,60704014,10372015);973计划(2002cb312205)资助项目

摘　　要：在现代卫星的姿态控制系统中,反作用轮得到了广泛应用。但是当反作用轮的转速过零时,摩擦力矩会对卫星的姿态产生较大影响。本文采用基于特征模型的黄金分割自适应控制方法,建立了包括反作用轮在内的卫星系统的特征模型,并由此设计了控制律。仿真结果表明,该方法可以有效抑制反作用轮低速摩擦对卫星姿态的扰动,从而可以提高卫星姿态控制精度。Reaction wheels are widely used in the modern spacecraft attitude control systems. But when the speed ofreaction wheel is crossing zero, the friction moment produced by reaction wheel may seriously affect the accuracy of satellite attitude control. This paper presents a golden-section adaptive control method which is based on the characteristic modeling, and builds the characteristic model of satellite systems including reaction wheels, then designs the control laws. The simulation results indicate that the approach can reduce the friction moment influence on attitude control accuracy and stability and, therefore, improve the accuracy of the attitude control.

关 键 词：姿态控制 低速摩擦 特征模型 全系数自适应控制 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]