The parameter identification of the engine equivalent excitation based on the model of the power train-full vehicle

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (18) : 154-163.

HE Zhicheng1.2 LIU Hongpu1 HAO Yaodong1 GU Chengbo3

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Abstract

The extraction of engine excitation for the design of mounting system is of significant, but the engine load identification is given priority to with inverse matrix method with the disadvantage of heavy workload, time-consuming, etc. This paper proposes a new method of the identification of engine excitation：The parameter model of engine equivalent excitation is set up, the acceleration of mount up and down is calculated by loading the excitation to the model of the power train-full vehicle, then the objective function is established based on the difference of the acceleration of experiment and simulation results, the engine multidirectional excitation is finally identified by identifying the parameters of equivalent excitation with genetic algorithm. A car was analyzed with this method, and the acceleration curve fitting degree was high, the load identification results were good; the mounting system was optimized with the load, eventually mounting system under the idle frequency vibration isolation performance greatly enhanced.

Key words

load identification / equivalent excitation / power train-full vehicle / genetic algorithm

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HE Zhicheng1.2 LIU Hongpu1 HAO Yaodong1 GU Chengbo3. The parameter identification of the engine equivalent excitation based on the model of the power train-full vehicle[J]. Journal of Vibration and Shock, 2017, 36(18): 154-163

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