基于周期变化惯量积的主动章动控制方法研究

Study on Periodically Varying Product-of-Inertia Based Active Nutation Control

偏置动量卫星姿态控制过程中会产生章动运动。若星体俯仰轴与其它轴存在固定的惯量积,则可以利用偏置动量轮有效地克服章动。针对转动惯量周期性变化的偏置动量卫星,提出一种通过在动量轮的控制律中引入时变的滚动轴信息,利用动量轮克服滚动轴/偏航轴章动影响的方法。通过数学仿真验证了该算法的有效性。

Nutation frequently occurs during the attitude control of momentum-bias satellites. It can be eliminated effectively by the wheel if the products of inertia of the pitch axis and other axes are constant. In this paper, time-varying roll information is integrated into the wheel control law. And a method of the wheel control is presented to overcome influences of nutation on roll and yaw axis. Finally, numerical simulations have been done to demonstrate the validity of this method.