Analysis of Braking Performance of Distributed Drive Vehicle Under Two-Wheel Hub Motor Failure

Abstract

For distributed hub-driven vehicles, under braking conditions, when the hub motor fails, it will seriously threaten the safety of the vehicle, and there will be dangerous conditions such as braking distance increase and braking deviation, while the failure of the two-wheel hub motor has a more complex impact on the braking performance of the vehicle. Based on this, this paper selected a distributed hub motor drive vehicle as the research object and simulated the braking performance of the vehicle under the failure of the ipsilateral-side two-wheel hub motor system, coaxial two-wheel hub motor system, and diagonal two-wheel hub motor system. Combined with the vehicle’s driving track, yaw speed, and centroid side deflection Angle, the influence degree of the vehicle’s braking and stability was analyzed. The results show that the failure of the outer two-wheel hub motor has the greatest effect on vehicle braking stability than that of the diagonal wheel failure and the coaxial wheel failure. The effect of two-wheel hub motor failure on vehicle braking is greater than that of diagonal wheel failure and ipsilateral-side wheel failure. With the increase in vehicle braking speed and the decrease in road adhesion coefficient, vehicle instability, and braking performance become worse and worse.