Influence of In-Wheel Motors Eccentricity on Ride Comfort of Electric Vehicles on Random Roads

doi:10.12068/j.issn.1005-3026.2022.08.007

Abstract

Abstract: To analyze the influence of in-wheel motors eccentricity on the ride comfort of electric vehicles， a four degree-of-freedom vibration model of electric vehicles was established to consider the mass and excitation of in-wheel motors. The corresponding state equation and output vector expression were derived， and the ride comfort evaluation index was determined. The random road excitation of the front wheel was established by using the filtered white noise method. The random road excitation relationship between the rear wheel and the front wheel was obtained by combining the Laplace transformation and the fourth-order symmetric Pade approximation. The whole vertical excitation of a typical four-phase 8/6-pole switched reluctance motor was presented. The simulation of random road excitation and in-wheel motor excitation was realized， and the ride comfort simulation and comparison of four working conditions were carried out on a B-grade road. The results showed that in-wheel motors eccentricity has an important influence on the ride comfort of electric vehicles on random roads， and the negative effect of in-wheel motors eccentricity should be considered in the design of electric vehicles.

Key words: battery electric vehicle; ride comfort; random road; in-wheel motor; motors eccentricity

CLC Number:

U461

LI Jie， JIA Chang-wang， CHENG Lin-hai， ZHAO Qi. Influence of In-Wheel Motors Eccentricity on Ride Comfort of Electric Vehicles on Random Roads[J]. Journal of Northeastern University(Natural Science), 2022, 43(8): 1113-1119.

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