Controllability analysis and intelligent control of magnetorheological whole-satellite under small amplitude and medium-high frequency vibration

Abstract

The satellite carried by the launch vehicle is subject to complex loads in the launch process, which can easily lead to the failure of the satellite launching. To improve the response of an existing magnetorheological (MR) whole-satellite system under small amplitude and medium-high frequency vibration during the launch phase, the MR damper is redesigned, and the controllability of the improved system is analyzed, and then a human-simulated intelligent controller (HSIC) is designed. After analyzing the over-damping problem of the existing MR whole-satellite system through sinusoidal sweep and impact simulation tests, the MR damper is redesigned and tested, then the controllability of the improved system is analyzed using vibration theory. Based on the theory of the HSIC, the feature model, control rules, and control modes of the intelligent controller are designed, and the controller parameters are optimized by genetic algorithm. The system simulation model based on HSIC is built to simulate the vibration control of the system. The simulation results show that compared with the skyhook control, the HSIC control method can not only effectively reduce the satellite resonance peak, but also has an obvious vibration reduction at a specific frequency band (40 Hz), which verifies the effectiveness of the algorithm.