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.
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
关键词
姿态控制
低速摩擦
特征模型
全系数自适应控制
attitude control
low-speed friction
characteristic modeling
all-coefficient adaptive control
