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Torque distribution control method of distributed type driving electric vehicle

A technology of torque distribution and electric vehicles, applied in the direction of electric vehicles, control drives, control devices, etc., can solve the problems of lack of tire force coupling characteristics, insufficient vehicle stability, considerations, etc., to improve stability and drive efficiency, reduce Calculation time, effect of improving accuracy

Active Publication Date: 2018-03-23
TONGJI UNIV
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  • Abstract
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Problems solved by technology

However, the above torque distribution algorithms have certain limitations, lack of consideration of the tire force coupling characteristics, resulting in insufficient stability of the vehicle

Method used

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  • Torque distribution control method of distributed type driving electric vehicle
  • Torque distribution control method of distributed type driving electric vehicle
  • Torque distribution control method of distributed type driving electric vehicle

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Embodiment Construction

[0047] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0048] Such as figure 1 Shown is the torque distribution control method of the distributed drive electric vehicle that this application proposes, comprises the following steps:

[0049] 1) Calculate the constraint range of the output moment of the tire:

[0050] 11) According to the current speed of the motor and the external characteristic curve, the range constraint of the output capacity of the motor is calculated;

[0051] 12) According to the torque response characteristics of the motor, calculate the rate constraint of the motor torque change in the discrete control;

[00...

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Abstract

The invention relates to a torque distribution control method of a distributed type driving electric vehicle. The torque distribution control method comprises the following steps of calculating the bounding range of the output torque of tires; according to the coupling properties of the tire force of the tires, and obtaining a dynamic efficiency matrix considering the situation that longitudinal force is exerted, so that the lateral force is changed through a stand test; according to the obtained dynamic efficiency matrix, establishing a weighted least squares majorized function of the torquedistribution considering different working conditions; and in combination with the obtained bounding range of the output torque, performing solving, so as to obtain the torque distribution result. Compared with the prior art, the torque distribution control method has the advantages of being higher in vehicle stability, higher in vehicle driving efficiency and the like.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a torque distribution control method for a distributed drive electric vehicle. Background technique [0002] Distributed drive electric vehicle, as an advanced electric vehicle power system, has great advantages in terms of power and economy. From a system perspective, distributed drives bring technical advantages such as controllable degrees of freedom, handling stability, and high efficiency and energy saving. Since there are multiple drive units in the distributed drive electric vehicle power system, how to realize coordinated control and torque distribution among the various drive units is a research focus. At the same time, different torque distribution strategies have a great impact on vehicle stability, power and economy. Currently available torque distribution control technologies include torque average distribution method and search method. However, the above torque dis...

Claims

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Application Information

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IPC IPC(8): B60L15/20B60L15/32
CPCB60L15/20B60L15/32B60L2240/423Y02T10/72
Inventor 熊璐侯誉烨冷搏余卓平
Owner TONGJI UNIV
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