›› 2015, Vol. 41 ›› Issue (3): 28-32.doi: 10.3969/j.issn.1674-1579.2015.03.006

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LowOrder Robust Control for Satellite with Large Flexible Appendages

  

  • Online:2015-06-24 Published:2015-07-09

Abstract: To deal with the flexible parameters uncertainties and external torque disturbance problems of satellites with large flexible appendages, a robust Hinfinity feedback multiinput, multioutput (MIMO) controller is proposed based on linear matrix inequalities (LMI). Parameters perturbations that caused by solar paddles rotating towards the sun and antenna’s expanding process are considered in the coupled dynamics of satellite. The proposed robust controller guarantees robust stability against the a forementioned higher vibration modes and modal parameters uncertainties for a linear parameter varying (LPV) MIMO system. Moreover, it is simple and suitable for engineering practice. The simulation results show that the given controller provides rapid stabilization for threeaxis attitude control, and is more robust than the typical PID controller in vibration and disturbance suppression.

Key words: flexible satellite, attitude control, control, LPV system, LMI

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