Design of Model Matching Robust Controller for Satellite's Precise Pointing

The dynamic model for attitude control of a satellite with circle orbits is established and linearized.The influence of the sensor' s noise on the attitude angle and attitude angular velocity is analyzed.Furthermore,the reference model is constructed.Considering the measurement errors of the noise and parameter uncertainty,the robust model matching H_∞controller is designed using weighting functions method.Its solution is obtained by the D-K iteration.The simulation indicates that the satellite can track the reference signal and the robust H_∞controller system has a good performance.