摘要
为实现偏置动量卫星滚动-偏航耦合通道外干扰力矩的前馈补偿,根据两通道的姿态动力学模型,从理论上分析了包括常值与周期干扰的外干扰力矩对滚动-偏航姿态的影响。由此导出飞轮前馈补偿项的数学表达式,并论证了引入外力矩对飞轮角动量进行卸载的必要性。仿真结果表明,该法能有效削弱外干扰力矩对星体姿态尤其是偏航姿态的影响,大幅提高星体控制精度。
To realize the feed forward compensation for outer disturbing moment in roll-yaw coupling channel for bias momentum satellite, the influence of the outer disturbing moment including constant disturbing and periodic disturbing on the attitude of roll-yaw channel in theoretically according to the attitude dynamic model of both channels in this paper. And the mathematical functions for compensation by flywheel feed forward were derived. The necessity of introducing outer moment to unload the angular momentum of the flywheel was proved. The simulation results showed that this method would weaken the influence of the outer disturbing moment on satellite attitude, especially on the yaw attitude effectively and improve the control precision greatly.
出处
《上海航天》
北大核心
2007年第3期20-25,共6页
Aerospace Shanghai
关键词
偏置动量卫星
滚动-偏航通道
姿态动力学
干扰力矩
前馈
外力矩
Bias momentum satellite
Roll-yaw channel
Attitude dynamics
Disturbing moment
Feed forward
Outer moment
