飞轮转速过零时卫星姿态的补偿控制研究  

A Study of Satellite Attitude Compensatory Control when the Speed of Flying Wheel Passing through Zero

作　　者：王蕴恒[1] 王吉元[1] 卜树坡[1] 

机构地区：[1]黑龙江科技学院电气与信息工程学院,黑龙江哈尔滨150027

出　　处：《计算机仿真》2009年第8期67-71,共5页Computer Simulation

基　　金：黑龙江科技学院引进人才基金资助项目(08-03)

摘　　要：为了提高小卫星姿态控制系统的控制精度和稳定性,解决反作用飞轮转速过零时由摩擦力引起的非线性扰动问题,根据姿态动力学理论,建立了卫星姿态控制的力学模型与数学模型,采用分别加入颤震信号和脉冲信号的方法,对摩擦力进行补偿,消除非线性扰动。通过仿真实验,对比加入颤震信号和加入脉冲信号的补偿控制方法,两种方法能够有效地抑制反作用飞轮转速过零时引起的姿态扰动,且加入脉冲信号方法优于加入颤振信号方法,前者能够更快的使系统达到稳定且消耗的能量少,从而实现了卫星姿态控制高精度和稳定性的控制。To improve the control accuracy and stability of the attitude control system of small satellites and solve the problem of the non - linear disturbance caused by the friction when the rotating speed of reaction wheels pass through zero, the mechanical and mathematic models are created according to the attitude dynamics principle. Based on the optimal control, the methods are acquired through adding chatter signals and pulse signals. The friction can be compensated by using it. The non - linear disturbance is eliminated. Through analysing simulation results, compa- ring the adding chatter signals method with the adding pulse signals method, the two methods can effectively inhibit attitude disturbance and the adding pulse signals method is much better. It can make the system steady faster and power energy consumption fewer. So it realizes the satellite attitude control with high precision.

关 键 词：反作用飞轮 最优控制 颤震信号 脉冲信号 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]