Research on Active Control with ADRC of Maglev Microgravity Vibration Isolation System
Precision instruments,sensitive equipment and microgravity experiments in space are vulnerable to space micro-vibration.The non-contact maglev microgravity vibration isolation system is one of the important and effective methods to solve micro vibration.Active control,which is essential to the vibration isolation effect of the system,is the core of research.Firstly,the decoupling model of 6-DOF attitude of the system is built based on the maglev microgravity vibration isolation platform,and the coupling dynamics model under external excitation is established.Then,the active disturbance rejection controller with"observation+compensation"based on displacement control is proposed and designed to track the target signal,observe the total interference of the system and compensate in real-time.Secondly,the simulation model of active control is established,and the influence of active control parameters on the maglev microgravity vibration isolation system is analyzed.Finally,the performance of the active control system is analyzed by simulation.The results show that the control system in this paper has good consistency and performance of vibration isolation,which provides certain technical and theoretical supports for the research of active control of maglev microgravity vibration isolation system.
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