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Braking intention identification method for electric vehicles based on acceleration and brake pedal states

A brake pedal, electric vehicle technology, applied in electric vehicles, electric braking systems, vehicle components, etc., can solve problems such as accelerator pedal information that are rarely considered comprehensively, achieve good driving feeling, increase recovery rate, improve accuracy and The effect of accuracy

Active Publication Date: 2021-03-30
ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the recognition of braking intention is mainly based on time-domain parameters such as brake pedal travel and its rate of change, and rarely considers accelerator pedal information comprehensively.

Method used

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  • Braking intention identification method for electric vehicles based on acceleration and brake pedal states
  • Braking intention identification method for electric vehicles based on acceleration and brake pedal states
  • Braking intention identification method for electric vehicles based on acceleration and brake pedal states

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Embodiment Construction

[0028] The flow of the electric vehicle braking intention identification method based on the acceleration and brake pedal states of the present invention is as follows: figure 1 As shown, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] During the driving of an electric vehicle, the driver directly manipulates the vehicle through the accelerator pedal and the brake pedal, and at the same time obtains the feedback of signals such as displacement and speed from the accelerator pedal and the brake pedal. Displacement sensors are installed on the accelerator pedal and the brake pedal respectively, and the line displacement data obtained by the displacement sensors at the measuring points are converted into the angular displacement of the driver stepping on the pedal according to the actual pedal mechanism size in the post-processing, and the differential of the pedal displacement is the pedal dis...

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Abstract

The invention relates to an electric vehicle brake intention recognizing method based on states of an accelerator pedal and a brake pedal. The method includes the steps of collecting displacement andspeeds of the brake pedal and the accelerator pedal respectively, obtaining the vehicle speed and battery state of charge (SOC) parameter value in real time, establishing a brake intention recognizingmodel including the acceleration mode, the sliding mode, the regenerative brake mode and the emergency brake mode, defining the displacement threshold value A1 of the accelerator pedal, entering theacceleration mode when the displacement of the accelerator pedal is larger than A1, entering the regenerative brake mode when the displacement of the accelerator pedal is smaller than A1, entering thesliding mode when the displacement and speeds of the accelerator pedal and the brake pedal are zero, defining the brake strength of the brake pedal, entering the regenerative brake mode when the brake strength is smaller than 0.7, otherwise entering the emergency brake mode, extracting feature vectors of the brake pedal after conducting Hilbert-Huang conversion on travel signals of the brake pedal, and recognizing the regenerative brake intention through a cluster recognizing algorithm.

Description

Technical field: [0001] The invention relates to the technical field of electric vehicle braking intention recognition, in particular to a method for electric vehicle braking intention recognition based on acceleration and brake pedal states. Background technique: [0002] The biggest difference between electric vehicles and internal combustion engine vehicles is that the power source is changed from an internal combustion engine to a motor. The motor can not only work in the driving state, but also in the regenerative braking state, recovering part of the vehicle’s kinetic energy and extending the driving range. With the improvement of the performance of electric vehicles and the process of gradually moving towards industrialization, improving the utilization efficiency of electric energy and extending the driving range are urgent problems to be solved, and regenerative braking technology has become a key technology to promote the development of electric vehicles. be valued...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/18B60L7/26
CPCB60L7/18B60L7/26B60L2260/44
Inventor 宋士刚林勇郭远晶
Owner ZHEJIANG COLLEGE OF ZHEJIANG UNIV OF TECHOLOGY
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