Active optimal control for multi-dim vibration damping device based on parallel mechanism

A new three-translation parallel mechanism is designed to solve the problem of three-dimension vibration damping. The parallel mechanism is met the need of three-dimension vibration damping, such as vehicle suspension. Through the establishment of the dynamic state-space equation and optimal control model of the active control system, a LQG controller is designed. The simulation model based on Matlab/Simulink environment was built and simulated by step and random vibration excitation for three directions respectively. The simulation results showed that the active control system with a LQG controller achieved the better performance of three-dimension vibration damping, especially in low frequency domain.