Sensory evaluation method for brake pedal of passenger vehicle based on intelligent unmanned test platform

A brake pedal and test platform technology, applied in vehicle testing, machine/structural component testing, measuring devices, etc., can solve problems such as poor braking smoothness and insufficient braking sensitivity, and achieve high-precision real-time control and Driving, eliminating human error, evaluating good results

Inactive Publication Date: 2020-01-14
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The most frequently reported problems in the braking feeling of automobiles are poor braking comfort and insufficient braking sensitivity, etc., but there are relatively few st

Method used

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  • Sensory evaluation method for brake pedal of passenger vehicle based on intelligent unmanned test platform
  • Sensory evaluation method for brake pedal of passenger vehicle based on intelligent unmanned test platform
  • Sensory evaluation method for brake pedal of passenger vehicle based on intelligent unmanned test platform

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Embodiment

[0044] (1) Environmental conditions

[0045] The passenger car brake pedal feel test should be carried out in a professional vehicle test site. A long, straight, dry asphalt asphalt road should be selected in the test site, and at the same time, there should be as few interfering vehicles as possible. In this way, not only can a good and stable road adhesion coefficient be obtained , and at the same time ensure that during the test, the intelligent unmanned test platform can obtain the highest possible braking initial speed of the vehicle under the premise of safety.

[0046] The environmental parameter requirements are shown in Table 1 below.

[0047] Table 1 Environmental parameters of brake pedal feel test

[0048] Environmental parameters Remark weather Dry weather, no precipitation, snowfall visibility Horizontal visibility not less than 1km wind speed Not more than 5m / s

[0049] (2) Equipment requirements for intelligent unmanned te...

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Abstract

The invention discloses a sensory evaluation method for a brake pedal of a passenger vehicle based on an intelligent unmanned test platform. The sensory evaluation method comprises the following steps: performing a vehicle brake response test, and evaluating sensitivity of the brake pedal of the vehicle by a brake response time, wherein the shortest brake response time corresponds to the highest sensitivity of the brake pedal; testing linearity of the brake pedal of the vehicle, recording an applied brake force and a corresponding brake deceleration, and evaluating the linearity of the brake pedal of the vehicle according to a squared value of a linear correlation coefficient, wherein the linear correlation coefficient is R, and R2 is an element of a set (0,1), when the R2 is the closest to 1, the linearity of the brake pedal of the vehicle is the best. In the formula, Y is the applied braking force, X is the brake deceleration corresponding to the applied brake force, [Y-bar] isan average value of scattered points of the brake force, and [X-bar] is an average value of the scattered points of the brake deceleration. The sensory evaluation method of the invention uses a brakepedal sensitivity test and a brake pedal linearity test to evaluate sensory performance of the brake pedal of the vehicle, and has high test accuracy and good evaluation effect.

Description

technical field [0001] The invention relates to a method for evaluating the feel of a brake pedal of a passenger car based on an intelligent unmanned test platform, and belongs to the technical field of vehicle brake performance test and evaluation. Background technique [0002] With the rapid development of the automobile industry, the number of automobiles in China has increased steadily. While consumers pay attention to the safety of cars, they also put forward higher requirements for the driving comfort of cars. As the safety performance of vehicles, the braking performance of automobiles has always been paid close attention to, especially the braking feeling. There are many types of brake systems in OEMs, and brake components of different models and parameters are matched and assembled together to form a brake system. As an input to the vehicle braking process, the brake pedal is a bridge connecting the driver and the vehicle. Brake pedal feel is an important source ...

Claims

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Application Information

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IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 杨畅梁荣亮郭瑞玲张晓辉
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
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