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Vehicle optimal torque allocation algorithm objective function building method

A technology of objective function and allocation algorithm, which is applied to vehicle components, electric vehicles, control drives, etc., to achieve the effects of ensuring power, improving stability, and reducing traffic accidents

Inactive Publication Date: 2019-10-01
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the more comprehensive and systematic problem of vehicle torque distribution, the present invention proposes a method for constructing the objective function of vehicle optimal torque distribution algorithm:

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  • Vehicle optimal torque allocation algorithm objective function building method
  • Vehicle optimal torque allocation algorithm objective function building method
  • Vehicle optimal torque allocation algorithm objective function building method

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Embodiment Construction

[0031] In order to ensure the power and stability of the FWID-EV under steering, the present invention provides a torque distribution method under the steering condition of a four-wheel independent drive electric vehicle. In one embodiment, the stability of the vehicle and the wheel hub Advantages of motor electric vehicles, use fuzzy control algorithm to fuzzy classify vehicle steering angle and steering angle variation, obtain adjusted driving torque, and adjust the driving torque obtained by the driver's closed-loop speed control model, and output the corrected driving torque value, which is used as the vehicle demand torque, and the difference between the vehicle’s actual yaw moment during turning and driving is used as the first item of the objective function in the optimal torque distribution controller, and the tire utilization rate is used as the second item of the objective function. For the quadratic programming problem, the driving force of the four wheels is allocat...

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Abstract

The invention discloses a vehicle optimal torque allocation algorithm objective function building method and belongs to the field of new energy automobile control. To achieve the purpose that the vehicle torque is allocated more comprehensively and more systematically, a longitudinal motion equation along the x axis and a yawing motion equation around the mass center of an automobile are built, the two equations are written in a matrix form, the matrix norm form of the objective function is built, and the effects that the FEID-EV dynamic property is guaranteed, meanwhile, the stability under steering conditions is improved, and the probability of traffic accidents is lowered are achieved.

Description

technical field [0001] The invention belongs to the field of new energy vehicle control, in particular to a torque distribution system and working method for four-wheel independent drive electric vehicle (FWID-EV) steering conditions, and a method for constructing an objective function of a vehicle optimal torque distribution algorithm. Background technique [0002] The intensification of global energy problems has promoted the development of new energy vehicles. The four-wheel independent drive electric vehicle has become the focus of the new energy vehicle industry because of its characteristics of less pollution, low energy consumption and independent control of wheel torque in terms of structure. However, there will be many safety problems in practical applications, especially in steering conditions, it is easy to occur a series of dangerous situations such as tail flicking and rollover. How to use its unique advantages to distribute torque to improve vehicle safety and ...

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/423Y02T10/72
Inventor 郭烈李琳辉赵一兵岳明许林娜孙大川
Owner DALIAN UNIV OF TECH
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