Shock isolation ability of a spring-electromagnetic absorber based on semi-active control

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (14) : 11-17.

ZENG Zecui1,2, ZHANG Lei1,2 , ZHANG Chunhui2 , YAN Ming1

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Abstract

A novel semi-active control spring and electromagnet (SSEM) isolator was proposed to address the defect of too short distance of effective isolation of constant-force isolators.The principle of SSEM isolator is that the magnitude and direction of the electromagnetic force are veried by using different strategies to adapt the specific shock environment.The nonlinear differential equation of motion of the SSEM isolator was built according to the principle.Then the parameter expanding method was used to solve the equation to obtain the approximate analysis solution.The analysis results have an excellent agreement with numerical results using fourth-order Runge-Kutta method.The resulted performance was compared with the performance of constant-force isolators.The results demonstrate that the SSEM isolator outperform constant-force isolators, not only for the optimal isolator coefficient is better, but also for the SSEM isolator can fast recover to the equilibrium position.

Key words

Semi-active controlling / Electromagnetic force / Parameter expanding method / Nonlinear differential equation

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ZENG Zecui1,2, ZHANG Lei1,2,ZHANG Chunhui2,YAN Ming1. Shock isolation ability of a spring-electromagnetic absorber based on semi-active control[J]. Journal of Vibration and Shock, 2019, 38(14): 11-17

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