Active vibration suppression and precision pointing control of piezo-based platforms and their applications to flexible spacecrafts

Abstract

Precision pointing is currently required for sensitive space instruments, such as space laser-communication, space telescopes, staring cameras, etc. To achieve quiet dynamic-environment and accurate pointing of sensitive instruments, this paper investigates piezo-based platforms by employing an adaptive-based control approach. First, a model reference adaptive controller is designed to suppress disturbances. Then, a PID tuning controller is augmented for precision pointing. The composite controller gives satisfactory performances. Finally, the simulation studies are presented to validate the proposed control method.