Study on Fault-Tolerant Control of Electric Vehicle Drive System under Extreme Steering Conditions
When the vehicle needs stable control of yaw due to under-steering or over-steering,if the previous fault-tolerant control is still adopted,the vehicle stability will decrease.A fault diagnosis method based on untracked Kalman filter(UKF)and on-board sensor signals is proposed to avoid the problem of poor vehicle stability caused by mandatory tracking of desired yaw.The research results show that under the high adhesion road surface,the general car will oversteer when it turns,and the car stability will decline sharply.The application of the method in this paper can ensure that the car is finally stable at the corresponding yaw rate,and the car can maintain strong steering performance.
electric vehiclefour-wheel drivefault diagnosisfault tolerant controluntraced kalman filtervehicle mounted sensor
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