Stability control of single-wheel failure in four-wheel independent drive electric vehicles

Abstract

The integration of the motor and transmission mechanism into the wheels of a four-wheel independent drive electric vehicle with hub motors increases the frequency of failures, especially torque output failures, which seriously affect vehicle stability and jeopardize driving safety. This paper focuses on the perspective of single-wheel torque output failure and studies the vehicle stability control strategy. Firstly, based on the constructed simulation dynamics model, a slip controller is designed to obtain the direct lateral moment. Then, based on the control allocation principle, upper-level lateral moment allocation rules are designed, and torque allocation rules under single-wheel torque output failure are formulated. Finally, simulation experiments are conducted under different operating conditions. The simulation results show that this control strategy can effectively control vehicle stability under single-wheel failure conditions and ensure safe driving.