Abstract:

Small satellite attitude control system schemes often used gravity stability and active magnetic control with a bias wheel. Attitude can capture the Earth using active magnetic control for the global space and roll over. This paper studies the external request during small satellite acquisition, the gravity pole's pointing request. The acquisition phase is regarded as a large attitude maneuver problem, and a model is built with Euler dynamics and quaternion. The regulator was assimilated PD control, and the assimilated PD parameters design adopted predigest analysis and experience debug; at the same time, the magnetic pole is analyzed and designed. At last, the attitude acquisition simulation result is provided, which indicates that it can capture the earth after several orbit periods, and thus proves the method is valid in this paper.

Key words: small satellite, active control, earth acquisition, attitude control, Euler dynamics and quaternion