High-Precision Attitude Compound Pointing Control for Space Moving Target Tracking

Traditional satellite platform attitude adjustment cannot meet the demand for high-precision tracking of space moving target. To improve the tracking accuracy, an attitude compound pointing control method is proposed. The method combines the satellite and the optoelectronic turntable into a composite system, which divide the labor, superimposing their outputs. Satellite designs backstepping attitude controller to achieve initial pointing and the spaceborne optoelectronic turntable adopts the improved compound PID control method to realize high-precision tracking. In addition, the system introduces a hybrid integrator-gain method to attenuate overshoot and improve anti-low frequency interference characteristics. The simulation results show that the tracking accuracy is improved greatly and the robustness and stability are also enhanced. The contribution of this work can provide technical support for future space moving target tracking missions.