Frequency Shaping Backstepping Robust Attitude Maneuver of Flexible Spacecraft

A robust controller algorithm based on frequency shaping was proposed for the maneuvering problem of flexible spacecraft. To suppress the vibration of flexible appendages., the time-frequency domain mixing performance index was introduced into the backstepping design process. Firstly., the first-level feedback controller by the optimal control method of frequency domain was designed., by which an optimal attitude maneuver path was constructed. Then an adaptive variable structure controller was used to track the maneuver path and compensate the influence of uncertainty and external disturbance. The simulation results demonstrated the effectiveness of the proposed algorithm.