Abstract:  Aiming at the shortcomings of the existing adjustable shock absorber structure, an intelligent shock absorber based on electromagnetic spring was designed. The principle of dynamic absorber was used to adjust its own frequency to adapt to various working conditions. Firstly, a new type of electromagnetic spring structure was designed. The structure of the electromagnetic spring was optimized through simulation, and the electromagnetic spring model was determined. Then, an intelligent shock absorber device with adjustable stiffness was designed based on the electromagnetic spring model, and the vibration damping performance of the intelligent shock absorber device was modeled and analyzed. The relationship between additional stiffness and current was discussed. Finally, by building a vibration measurement system platform, the vibration damping performance of the smart shock absorber was tested experimentally, the results were compared with the simulation results, and the causes of the error were analyzed. The research results show that under the current condition of 0—5A, the frequency adjustable range of the intelligent shock absorber is about 14Hz, and it has the damping function of the broadband optimal index. The stiffness linearization degree of electromagnetic spring is good near the equilibrium position. The current in the coil is approximately linear with the additional stiffness. The simulation and experimental data of intelligent shock absorber have good consistency. Comparing with the ordinary damper, the intelligent shock absorber has good damping effect in a wide frequency domain.

Key words:  electromagnetic spring; intelligent vibration absorber; stiffness adjustable; additional stiffness

WEI Hong-tao, SONG Xue-ke, WANG Zhen-ning, et al. Intelligent vibration absorber based on electromagnetic spring［J］.Journal of Mechanical & Electrical Engineering, 2022,39(1):32-39.