| Based on the TS-1 micro-satellite developed by HIT, the attitude control algorithm using magnetotorquers and reaction wheels is systematically studied for three-axis stabilized micro-satellite in this dissertation, which is founded by the National Aerospace Advanced Technology Project"Collectivity technique for integrated system of micro-satellite"and Pre-research Item"Research on the new technology of small satellite". The main contents of the dissertation consist of the following parts:Active magnetic control method is researched. A quasi PD control algorithm is designed, and the energy-optimal magnetic dipole moments are generated by the expected magnetic control torques. And also, a continuous dumping method is studied. The magnetic dipole moments can be generated from a linear method. The simulation results prove that the active magnetic control algorithm is valid on the condition of the limited magnetic control torques.High-accuracy and high-steadiness attitude control and maneuver control strategies are emphasized. The allocation scheme of reaction wheels is analyzed, and the model of frictional characteristics of reaction wheel is built. The control strategy combining magnetotorquers and reaction wheels is adopted, and the feedback control law using quaternion errors is designed. And then, a successive-approximation large-angle maneuver control algorithm is proposed. The simulation results prove the two control algorithms are useful.At last, a simulation of mixed control modes is discussed. On one hand, the system model is built by Matlab/Simulink/Stateflow and the numerical simulation is presented. On the other hand, the xPC and dSPACE real-time simulation targets are briefly introduced, furthermore, the real-time simulation for the control algorithm of mixed modes is completed. The real-time simulation results prove that the control tasks can be accomplished fast and precisely with the control algorithms.
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