Distributed driving type electric automobile failure control system based on quadratic optimization

Abstract

The invention relates to a distributed driving type electric automobile failure control system based on quadratic optimization, which comprises a man-automobile state observation system, a steering wheel turn angle sensor, an automobile speed sensor, a required longitudinal driving force sensor and a required direct yawing torque sensor. The distributed driving type electric automobile failure control system is characterized by further comprising an integral driving force failure distribution controller based on quadratic optimization and four driving motor failure state sensors. A driver monitors the driving state of an automobile via the man-automobile state observation system in real time, and simultaneously monitors the driving motor failure state sensors, when failure of driving motors is detected via failure factor values, an integral automobile controller transmits acquired signals to the integral driving force failure distribution controller, dynamic property and stability requirements of the driver are formulated by the aid of the integral driving force failure distribution controller according to steering wheel turn angle signals and automobile speed signals, and an optimal value of driving force is obtained by means of combining other values, and is transmitted to various driving motors. The distributed driving type electric automobile failure control system can be widely applied to failure coordination control of distributed driving type electric automobiles.

Description

technical field [0001] The invention relates to a vehicle failure control system, in particular to a distributed drive electric vehicle failure control system based on secondary optimization. Background technique [0002] Electric vehicles can effectively solve the problems of energy shortage and environmental pollution in our country. Distributed drive electric vehicles have become an important development direction in the field of electric vehicles due to their advantages of fast response, short drive chain, efficient transmission and compact structure. In the prior art, there are many failure control methods for the drive motor of distributed drive electric vehicles, most of which usually focus on fault diagnosis and fault-tolerant control of the drive motor. When it is judged that the driving motor fails, the prior art proposes a control method of simultaneously closing the failed driving wheel and the opposite side driving wheel to ensure driving safety. Guarantee a p...

AI Technical Summary

Problems solved by technology

When it is judged that the driving motor fails, the prior art proposes a control method of simultaneously closing the failed driving wheel and the opposite side driving wheel to ensure driving safety. Guarantee a part of the driving ability, but the above-mentioned failure control system cannot perform real-time distribution control of the driving force according to the current driving state of the vehicle, and it does not consider the situation that part of the driving force can also be issued when the driving motor fails partially, nor does it fully consider the driving force. Motor response speed characteristics, which not only weakens the longitudinal drive performance and lateral stability of distributed drive electric vehicles, but also does not completely solve the problem of reasonable driving under failure conditions

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