期刊
MATERIALS
卷 15, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/ma15248893
关键词
MR damper; BUCK; Fuzzy-PI; current driver
类别
资金
- GF Special Administrative Region Foundation
- Natural Science Foundation of China [51875056]
In this paper, a fuzzy PI control strategy for the magnetorheological damper (MRD) current driver is proposed, which can adapt to parameter changes and ensure accurate current output.
Magnetorheological dampers (MRD) are increasingly used in smart structural damping systems due to their good damping properties. In practical applications, as a nonlinear device, the parameters of the internal excitation coil of the magnetorheological damper will change during operation under the influence of the temperature and external environment, deteriorating the dynamic performance of the output current of the driver and reducing the damping effect of the system. Therefore, the current driver needs to be optimized for this phenomenon in order to ensure accurate current output. In this paper, a mathematical model of the buck circuit combined with the MRD equivalent circuit is established, and after analyzing the model, the parameters of the PI controller are rectified to lay the foundation for the design of the adaptive law. Then, with the help of the fuzzy control method, a fuzzy PI control strategy for MRD current driver is established, which enables the current driving system to adjust the control parameters adaptively when the MRD parameters change and ensure the accurate driving current output. The experimental results demonstrate that the fuzzy PI control strategy has a stronger robustness in the face of parameter changes of the control object compared with the traditional PI control at a system parameter change rate of 40%.
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