A method for determining the regenerative braking distribution coefficient of electric vehicles
A technology of regenerative braking and distribution coefficient, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of poor energy recovery efficiency, and achieve the effect of improving energy recovery rate, reasonable torque distribution, and easy realization.
Inactive Publication Date: 2017-10-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
The parallel type has the characteristics of reliable operation, simple structure, and easy engineering implementation, but its energy recovery efficiency is not as good as the series regenerative braking distribution strategy
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[0056] figure 1 It is a flow chart of the method for determining the regenerative braking distribution coefficient of an electric vehicle in the present invention.
[0057] In this example, if figure 1As shown, the method for determining the regenerative braking distribution coefficient of the present invention mainly includes the following three steps:
[0058] T1. Determine the membership function of input and output in fuzzy control;
[0059] T2. Determine the fuzzy control rules;
[0060] T3. Introduce fuzzy control rules into the braking force distribution strategy of the electric vehicle model.
[0061] The above three steps are described in detail below:
[0062] T1. Determine the membership function of fuzzy control input and output
[0063] In this example, if figure 2 As shown, determining the membership function of fuzzy control input and output includes the following steps:
[0064] T1.1), collect a large amount of experimental data through the pedal sensor...
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The invention discloses a method for determining the regenerative braking distribution coefficient of an electric vehicle. First, the total braking force is distributed to the front and rear wheels according to the ideal braking force distribution curve, and then a fuzzy control algorithm is used to distribute the braking force of the front wheels of the electric vehicle as regenerative braking. Dynamic and frictional braking forces. In the specific implementation process, this patent adopts a fuzzy control algorithm with vehicle speed, braking force intensity and battery SOC as input and regenerative braking proportional coefficient as output. Among them, the membership function of battery SOC is determined by fuzzy statistical method, and the membership function of other input and output is determined by collecting a large amount of experimental data, combining practical experience and safety considerations.
Description
technical field [0001] The invention belongs to the technical field of electric vehicles, and more specifically relates to a method for determining the regenerative braking distribution coefficient of an electric vehicle. Background technique [0002] In recent years, electric vehicles have developed rapidly, but the problem of insufficient battery life has attracted widespread attention from scholars at home and abroad. Regenerative braking control is an important way to increase the mileage of electric vehicles. [0003] There are mainly two kinds of existing regenerative braking torque distribution strategies: serial regenerative braking control strategy and parallel regenerative braking control strategy. The series regenerative braking control strategy has the characteristics of high braking energy recovery rate, but its disadvantages are also obvious, that is, the system is complicated, the technology is difficult, and it is not easy to realize. The parallel regenerat...
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IPC IPC(8): G06F17/50
Inventor 郑宏魏旻杨圆圆曹继申
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA