Construction of a virtual electric vibration system considering the nonlinearity of electromagnetic force

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (2) : 152-158.

ZUO Shuguang,HUANG Rongkui,FENG Zhaoyang,WU Chengxi

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Abstract

There are some problems such as long test period and high cost for shakers to carry out the vibration test of automobile parts.A virtual electrodynamic vibration system was constructed by the finite element method.The finite element model was established,and the whole process from the input of the moving coil current to the acceleration output of the shaker was realized.The theoretical analysis and finite element simulation on the electromagnetic driving force of the moving coil have found that the force is unevenly distributed in space and its magnitude is related to the position of motion which exhibits obvious nonlinear property.Using the virtual vibration system for case simulations,the simulation results show that the non-linearity of the electromagnet driving force acting on the moving coil can cause the harmonic distortion of acceleration output signals.Compared with thelinear electromagnetic model,the virtual vibration system can provide a more accurate and realistic virtual vibration environment.

Key words

electrodynamic vibration system / virtual simulation / nonlinearity / harmonic distortion

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ZUO Shuguang,HUANG Rongkui,FENG Zhaoyang,WU Chengxi . Construction of a virtual electric vibration system considering the nonlinearity of electromagnetic force[J]. Journal of Vibration and Shock, 2019, 38(2): 152-158

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