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Design of Active-Passive Composite Vibration Isolation System of Magnetic Levitation and Spring Based on Fuzzy PID Control

External vibration is a major problem affecting the use of precision instruments. In order to solve this problem, based on mechanical passive vibration isolation, this paper designs an active-passive composite vibration isolation model of magnetic suspension and spring with active magnetic suspension control technology, and proposes a differential position-current double closed-loop fuzzy PID vibration isolation control strategy. Then, the control law of the maglev -spring system is brought into the nonlinear model under different excitation conditions, and the experimental results are obtained. Finally, the experimental results show that the designed active-passive composite vibration isolation control technology can effectively attenuate the external vibration, indicating that the design scheme is reasonable and feasible.