基于重力梯度杆和磁铁的小卫星三轴姿态控制

运用卫星低轨道两个主要环境力矩（重力梯度矩和地磁力矩）对圆轨道卫星三轴姿态进行被动控制。利用重力梯度矩实现卫星对地指向：卫星上的永久磁铁获取所需的地磁力矩,稳定偏航姿态。给出卫星的姿态分析,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、时刻对地定向、低轨道倾角时卫星姿态稳定精度较高的优点。

Small Satellite Three-Axis Passive Attitude Control Using Gravity Gradient Pole and Permanent Magnet

In this paper, three-axis passive stabilization is realized by using two main environment torques (gravity gradient and geomagnetic torque) in low orbit. The satellite can point to ground by gravity gradient. Geomagnetic torque for yaw stabilization is provided by permanent magnet on the satellite. This paper presents attitude analysis and simulation results. The result shows the satellite has the advantages of simple structure and pointing to ground at once.