DRIVING FAULT-TOLERANT CONTROL STRATEGY OF FOUR-WHEEL DRIVE ELECTRIC VEHICLE

This paper proposes a cooperative game-based actuator fault-tolerant control strategy for a four-wheel independent drive electric vehicle with an active front steering system. For achieving fault-tolerant control and targets cooperation, a two-dimensional game strategy is proposed to balance the stability and economy. The first-dimensional game is utilized to determine the dominant control target of the actuator, then the second-dimensional game is employed to assign the fault-tolerant control task for the remaining healthy actuators. The two dimensions are integrated based on the linear quadratic differential game theory, and a hybrid weighted Pareto frontier is thus established. A Shapley value based weight calculation method is proposed to obtain a set of fair and unique weights according to the importance of each player, which makes the solution of the optimal control problem more easily obtained. The effectiveness and real-time performance of the control strategy are tested under different scenarios. The simulation results demonstrate that the proposed strategy can balance the stability and economy well, outperforms the traditional method in terms of target tracking performance. For special case, the response of the yaw rate could be improved up to 39.83% comparing to that of the linear quadratic regulator method.

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Motor fault tolerant control strategy for distributed driving electric vehicle

2014 IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific) ◽

10.1109/itec-ap.2014.6941121 ◽

2014 ◽

Author(s):

Xiaokun Sun ◽

Hongwen He ◽

Xinlei Liu

Keyword(s):

Electric Vehicle ◽

Control Strategy ◽

Fault Tolerant ◽

Fault Tolerant Control

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Lateral Stability Control of Four-Wheel-Drive Electric Vehicle Based on Coordinated Control of Torque Distribution and ESP Differential Braking

Actuators ◽

10.3390/act10060135 ◽

2021 ◽

Vol 10 (6) ◽

pp. 135

Author(s):

Liqing Chen ◽

Zhiqiang Li ◽

Juanjuan Yang ◽

Yu Song

Keyword(s):

Control System ◽

Electric Vehicle ◽

Electric Vehicles ◽

Control Strategy ◽

Coordinated Control ◽

Control Model ◽

Lateral Stability ◽

Torque Distribution ◽

Wheel Drive ◽

Four Wheel Drive

This research focuses on four-wheel-drive electric vehicles. On the basis of the hierarchical coordinated control strategy, the coordinated control system of driving force distribution regulation and differential braking regulation was designed to increase the electric vehicles steering stability under special road working conditions. A seven-degree-of-freedom model of an electric vehicle was established in MATLAB/Simulink, and then a hierarchical coordination control model of the Electronic stability program and dynamic torque distribution control system was established. Adaptive fuzzy control was applied to ESP and, based on the neural network PID control, a torque distribution control system was designed. On the basis of the proposed coordinated control model, a performance simulation and a hardware-in-the-loop test of the control system under the typical working condition of single line shift were carried out. From the final results, it can be seen that the proposed control strategy can greatly improve the safety of the vehicle after serious side slip, increase the stability of the whole vehicle, and effectively increase the vehicle lateral stability.

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