圆饼卫星三轴姿态控制

Three-Axis Attitude Control of the Disc Satellite

利用卫星低轨道两个主要环境力矩 (重力梯度矩和地磁力矩 )对卫星三轴姿态进行控制。卫星的形状为圆饼状 ,用以获得所需的重力梯度矩。卫星上的永久磁棒获取所需的地磁力矩。为了提高卫星的姿态精度 ,沿永久磁铁方向安装一反作用飞轮。对卫星在圆轨道的姿态进行了分析 ,并给出仿真结果。从分析和仿真结果可以看出 ,此卫星具有结构简单、姿态稳定、精度高等优点。

In this paper, three axis attitude stabilization is realized by using two main environment torques (gravity gradient and geomagnetic torque) in the low orbit. The satellite in a disc shape is used to obtain gravity gradient. Geomagnetic torque is brought about by a permanent magnet on the satellite. In order to improve attitude precision, a reaction wheel is fixed along the direction of the magnet. The attitude is analysed, and the simulations are made. The results show that the satellite has a simple structure and excellent control precision.