A Multi-objective Optimization Method for Wheel Torque of Electric Wheel Drive Vehicles Based on the Optimal Vehicle Comprehensive Performance

A technology of multi-objective optimization and comprehensive performance, applied in the field of wheel torque distribution of electric wheel drive vehicles, can solve the problem of studying stability or economy alone, restricting the development of high-performance electric wheel drive vehicles, and rarely taking into account the electric wheel Drive vehicle stability and economy to achieve the effect of ensuring vehicle stability, improving solution speed, and improving the ability of different driving conditions
CN108422901BActive Publication Date: 2019-11-12JILIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2019-11-12

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Abstract

The invention discloses a wheel torque multi-objective optimization method for an electric wheel drive vehicle based on an optimal vehicle comprehensive performance. The method comprises the followingsteps: step one, calculating a vehicle requirement yaw moment of couple; step two, estimating each drive wheel slippage rate; step three, fitting an electric drive system loss characteristic curve; step four, establishing an online optimized objective function, and according to the requirement yaw moment of couple, the wheel slippage rate and the electric drive system loss, solving the objectivefunction to obtain each wheel torque; and step five, sending the requirement moment of force decided by each wheel to a controller of each wheel hub motor. According to the wheel torque multi-objective optimization method for the electric wheel drive vehicle based on the optimal vehicle comprehensive performance provided by the invention, in an online optimization process, by comprehensively considering the motor energy consumption, a yaw velocity tracking error and the slippage loss, the online optimization on each wheel driving torque of the electric wheel drive vehicle is performed, therebyimproving the vehicle economic efficiency as possible under the precondition of guaranteeing the vehicle stability, and realizing the optimal vehicle comprehensive performance.
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Description

technical field

[0001] The invention belongs to the technical field of wheel torque distribution methods of electric wheel-driven vehicles, and in particular relates to a multi-objective optimization method for wheel torque of electric wheel-driven vehicles based on the optimal comprehensive performance of the whole vehicle. Background technique

[0002] Under the dual pressure of environmental pollution and energy shortage, electric vehicles have developed rapidly. The electric wheel drive vehicle saves the mechanical structure such as the transmission and differential of the traditional car, simplifies the structure and improves the transmission efficiency. The driving torque of each wheel of the electric wheel drive vehicle is independently controllable, and the rational distribution of the driving torque among the driving wheels can not only improve the stability of the electric vehicle, but also improve the driving economy. Electric wheel-driven vehicles can achieve be...

Claims

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