Abstract: Different from the normal sequence consisting of attitude detumble, acquisition, and wheel speed-up, a method of attitude acquisition and stabilization for magnetic controlled micro-satellite is proposed, which uses B-dot controller, momentum wheel acceleration for detumble and active magnetic controller, and constant wheel. A limiting attitude feedback controller is designed for attitude capture and stabilization, and a LQG controller for attitude stabilization. Simulation is carried out using magnetic determination and control at different time. Measurement error, disturber moment and different bias momentum are considered. The result indicates that the method makes the control process simple and convenient, and can reduce initial control time with high control time with high control precision and robustness in stabilization.

Key words: micro-satellite, active magnetic control, B-DOT controller, limiting attitude feedback, LQG controller