- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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| Citation: | ZHAI Mingda, ZHANG Bo, LI Xiaolong, LONG Zhiqiang. Design and Implementation of Magnetic Suspension Vibration Isolation Platform with Quasi-Zero Stiffness Based on Fuzzy PID Control[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 886-895. doi: 10.3969/j.issn.0258-2724.20220880
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In order to effectively reduce the natural frequency of systems and realize the strong attenuation of external vibrations in multiple frequency bands, a magnetic suspension vibration isolation platform with quasi-zero stiffness was designed, in which the permanent-magnet and electromagnetic hybrid actuator was the negative stiffness structure, and an active vibration control system based on fuzzy PID (proportional integral differential) algorithm was implemented. Firstly, based on the theory of quasi-zero stiffness, the scheme of the magnetic suspension vibration isolation platform with quasi-zero stiffness was designed through characteristic analysis and parameter calculation; secondly, the model of the magnetic suspension vibration isolation system was established, and the active vibration control strategy based on fuzzy PID algorithm was designed to actively adjust the equivalent stiffness and damping of the system; finally, an active vibration control system was developed based on the Speedgoat real-time target machine. A vibration isolation test platform was built, and a series of vibration isolation performance tests were carried out. The results show that the magnetic suspension vibration isolation platform with quasi-zero stiffness can actively adjust PID parameters by adopting a fuzzy PID control strategy and dynamically adjust the equivalent stiffness and damping of the system. When the external vibration frequency is 20–100 Hz, the vibration attenuation rate is greater than 80%; when the external vibration frequency is 100–500 Hz, the vibration attenuation rate is greater than 90%.
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