Flexible Vibration Suppression Based on Positive Position Feedback Combined with Adaptive Controller for Spacecraft with Flexible Structure

This paper proposed a flexible vibration suppression strategy based on positive position feedback (PPF) for spacecraft with flexible structure. The PPF structure uses piezoelectric ceramic elements as sensors and actuators, and the vibration damping of the flexible mode is increased to achieve the purpose of active vibration suppression. From the perspective of system structure, the PPF compensator changes the original pole position of the system through the control algorithm, so as to increase the damping of the system. Combined with terminal sliding mode (TSM) adaptive controller, PPF strategy can actively suppress the vibrations of flexible accessories of spacecraft.