Variable Universe Self-tuning Fuzzy PID Controller of Attitude Maneuver for Flexible Spacecraft

The attitude dynamical equations of flexible spacecraft with solar panels were established, and the attitude kinematic equations were described by modified Rodrigues parameters (MRPs) in order to prevent the singularity of the large angle maneuver. A variable universe self-tuning fuzzy PID controller was proposed for model uncertainties and environmental disturbances. A new shrinkable factor was designed, and it was easy to calculate and could achieve the accuracy. Numerical simulation based on Matlab/Simulink shows that the response of the variable universe self-tuning fuzzy PID controller are 350 s faster than that of the conventional PID and fuzzy PID controllers, and that it has no overshoot and can realize the effective control of attitude maneuver and effectively suppress the vibration of solar panels.