Study on the Torque Allocation Strategy of the Distributed Driving Electric Vehicles Running in Straight Line with a Single Failure Motor

The problem of the torque allocation with a in-wheel motor in failure state for distributed driving electric vehicles running in straight line is discussed and solved in the paper. The researched vehicle is designed with four-wheel-steering system and four in-wheel motors. To achieve a good riding stability and dynamic property with a motor in failure state, three kinds of control strategies for torque re-allocation are proposed based on the performance of the distributed driving electric vehicles, and then the comparisons and discussions for the proposed control strategies has conducted. And their mathematic models are established and simulated by MATLAB/Simulink soft. The results indicate that above control strategies for torque re-allocation with a motor in failure state can achieve the designed demands well, and the dynamic performance of the distributed driving electric vehicles has been enhanced.