地球引力差异对地球卫星姿态稳定性的影响

Effect of Difference Gravitation on the Stabilization of the Earth Satellite

在地球卫星轨道上,由于地球引力差异使地球卫星受到引力梯度力矩,所以对地球卫星姿态的稳定性产生一定影响.本文从万有引力定律出发,推出引力梯度力矩一般表达式和地球卫星小姿态角时的引力梯度力矩表达式,并得出地球卫星姿态稳定的条件.

Because the gravitation difference brings the earth satellite the gravitation gradient moment it has a effect on the earth sateUite＇s attitude satbillization while the earth satellite being on the track. The general expressing formula of gravitation gradient moment and when the earth satellite＇s attitude angle is small the expressing formula of gravitation gradient moment is analyzed by the univeral gravitation law, and the condition of the earth satellite＇ s attitude stabilization is drawn.