Consensus Positive Position Feedback Robust Control for Vibration Reduction Under Fault Tolerance

In this study, active vibration robust control based on the mutual collaboration of agents under fault tolerance for large flexible smart truss structures (LFSTS) is investigated. First, the electromechanical coupling dynamic equation of the active truss is analyzed based on the finite element method. Subsequently, the positive position feedback (PPF) and consensus positive position feedback (CPPF) algorithms are compared, analyzing the reduction of the vibration relying on the optimal PZT stack actuator's position when agents collaborate in the designed communication topology network. Finally, simulations considering agent failure are performed to verify the fault tolerance and robustness of the active vibration control system. Compared with free vibration and PPF method, the results show that CPPF exhibits robust performance in rapidly suppressing the vibration of the LFSTS, which considerably enhances system reliability and improves pointing accuracy.