Adaptive sliding mode control of flexible spacecraft on input shaping

In order to deal with vibration suppression in the process of a large flexible spacecraft attitude maneuver, this paper puts forward a method which combines input shaping (IS) with adaptive sliding mode control (ASMC). This strategy suppresses the flexible nominal system residual vibration by input shaping, and the sliding mode control ensures an actual system tracking the nominal system under the influence of parameter uncertainties and external disturbances, solving the problem of the sensitivity of input shaping to parameter uncertainty and external disturbance. Furthermore, when the adaptive law for the switch gain is utilized for the sliding mode, the prior knowledge of the upper bounds on the external disturbance and parameter uncertainty is not required for switching gain tuning. Finally, simulation results show that the proposed control method can ensure the desired attitude maneuver and residual vibration suppression under parameter uncertainty and external disturbance.