- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | XIAO Ling, ZHOU You, ZHAO Chenxi, ZHENG Shandong, CHENG Wenjie, FENG Sheng. Vibration Reduction of Bearing-Rotor with Electromagnetic Damper Considering Dynamic Stiffness[J]. Journal of Southwest Jiaotong University, 2023, 58(4): 957-964. doi: 10.3969/j.issn.0258-2724.20230065
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In order to suppress the unbalance vibration of the rotor system effectively, the electromagnetic damper considering dynamic stiffness was applied to the rotor system in this paper. Firstly, the motion equations of the rotor system were established and nondimensionalized; secondly, based on the equivalent magnetic circuit method, the electromagnetic damper model considering the eddy-current effect was established, and the influence of the eddy-current effect on the stiffness of the electromagnetic damper was analyzed. The particle swarm optimization (PSO) algorithm with nonlinear dynamic adaptive inertia weight was used to optimize the three control parameters of the proportion integration differentiation (PID) of the electromagnetic damper; finally, the dynamic characteristics of the rotor were analyzed. The results indicate that under the influence of the eddy-current effect, the stiffness of the electromagnetic damper dynamically changes. When the speed is 100 kHz, the displacement stiffness and current stiffness decrease by 10.0% and 6.6% respectively; the PID parameters optimized by the PSO algorithm with nonlinear dynamic adaptive inertia weight have great control effects, such as fast response and small overshoot, and they can quickly adjust the deviation of the disk to 0 within 0.1 seconds; compared with static stiffness, the amplitude of the disk increases slightly after considering dynamic stiffness. When the speed is 4 782 Hz, the amplitude of the disk increases by 5.33%; the increase in eccentricity will lead to an increase in the amplitude of the disk. When the speed exceeds 242 Hz, the amplitude of the disk increases almost proportionally to that of the disk eccentricity.
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