Method and system for controlling electronic differential speed of electric vehicle, and electric vehicle

Abstract

The invention belongs to the technical field of differential speed control, and discloses a method and system for controlling the electronic differential speed of an electric vehicle, and the electric vehicle adopts the Ackermann steering model and combines the yaw angular velocity to obtain an improved Ackerman steering model; according to the vehicle's Yaw angular velocity to get the final angle coefficient; obtain the corrected angle coefficient K2 and combine the original correction model to obtain the corrected steering angle δ″=δ*K1*K2, and substitute it into the Ackermann model to obtain the corrected driving wheel speed V1 , V2; Wherein δ is the front wheel steering angle, angle coefficient K1. The control method of electric vehicle electronic differential of the present invention is comparatively simple in realizing, only needs to use signal processing integrated board and vehicle-mounted sensor and just can realize. Promptly utilize less resources to achieve a better effect of the electronic differential, while the overall method to achieve a lower cost, with great market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of differential speed control, and in particular relates to a method and system for controlling the electronic differential speed of an electric vehicle and the electric vehicle. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the increasingly serious environmental pollution and the depletion of fossil energy, electric vehicles rely on the advantages of clean energy and no pollution, and gradually begin to replace traditional fuel vehicles. As the core issue of in-wheel motor electric vehicles, the electronic differential system is getting more and more attention in this field. Most of the electronic differential system research is designed on the basis of torque control, including many using traditional PID, fuzzy control and sliding mode control. The disadvantage is that this control method has a certain threshold, and it is not practi...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the existing technology is: the defect of the traditional PID is that the control method has a certain threshold, and it is not practical for most electric vehicles on the market.

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