摘要
采用偏置动量轮加磁力矩器作为控制方案的非重力梯度微卫星不同于通常的速率阻尼—姿态捕获—动量轮起旋控制模式.针对这一问题,该文提出了B-DOT磁控加动量轮常值起旋、主动磁控加常值动量轮进行姿态捕获和稳定控制的方法,设计了限制姿态反馈控制律进行捕获和稳定控制,以及LQG稳定控制律.采用磁场测量与磁控分时处理的策略,考虑测量误差和干扰力矩,以及不同偏置动量进行仿真.结果表明该方法使整个控制过程操作简捷,初态控制阶段时间显著减少,稳态阶段具有较高的控制精度和抗干扰能力.
Different from the normal sequence consisting of attitude detumble, acquisition, and wheel speed-up, a method of attitude acquisition and stabilization for magnetic controlled micro-satellite is proposed, which uses B-dot controller, momentum wheel acceleration for detumble and active magnetic controller, and constant wheel. A limiting attitude feedback controller is designed for attitude capture and stabilization, and a LQG controller for attitude stabilization. Simulation is carried out using magnetic determination and control at different time. Measurement error, disturber moment and different bias momentum are considered. The result indicates that the method makes the control process simple and convenient, and can reduce initial control time with high control precision and robustness in stabilization.
出处
《应用科学学报》
CAS
CSCD
北大核心
2007年第4期377-381,共5页
Journal of Applied Sciences
基金
教育部博士点基金项目(20030287005)
关键词
微卫星
主动磁控
B-DOT控制
限制姿态反馈
LQG控制
micro-satellite
active magnetic control
B-DOT controller
limiting attitude feedback
LQG controller
