Multidisciplinary Optimal Design Method for Suspension System Based on Brake Judder and Road Noise Performance

A suspension system and optimization design technology, applied in multi-objective optimization, design optimization/simulation, computer-aided design, etc., to achieve the effects of reducing the risk of design changes, low cost, and saving R&D costs

Active Publication Date: 2021-04-06
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the product development process, mainstream automobile manufacturers mainly adopt the "serial design" mode, that is, to control the performance of brake vibration and road noise separately. The design has to go through multiple cycles, and it is still difficult to solve the existing performance conflicts

Method used

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  • Multidisciplinary Optimal Design Method for Suspension System Based on Brake Judder and Road Noise Performance
  • Multidisciplinary Optimal Design Method for Suspension System Based on Brake Judder and Road Noise Performance
  • Multidisciplinary Optimal Design Method for Suspension System Based on Brake Judder and Road Noise Performance

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] Such as figure 1 A suspension system multidisciplinary optimization design method based on brake vibration and road noise performance is shown, including the following steps: Step 1, problem identification and P-diagram analysis, to determine the relevant parameters of the suspension system multidisciplinary optimization design;

[0032] There are many factors that affect the performance of brake vibration and road noise, such as: time influence, external ambient temperature, interaction between various systems of the vehicle (suspension system change, tire pressure change), system error (hard point size error, etc. ) and user usage. Through the analysis of the P diagram, the relevant parameters of the multidisciplinary optimal design of the suspension system are determined as follows:

[0033] The input signal includes the BTV data of the brake disc under the cond...

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Abstract

The present invention relates to a suspension system multidisciplinary optimal design method based on brake jitter and road noise performance, comprising: Step 1, determining relevant parameters of the suspension system multidisciplinary optimal design; Step 2, establishing a brake jitter simulation analysis model and road noise simulation model and conduct simulation analysis; step 3, determine multiple design variables that need to be optimally designed for the suspension system, and parametrically model each design variable; step 4, perform DOE sampling calculation of each design variable; step 5 , extract DOE sample points and calculation results, construct an approximate response surface model I that meets the accuracy requirements based on the brake vibration performance, and construct an approximate response surface model II that meets the accuracy requirements based on the road noise performance; step 6, based on the two Approximate model, perform multidisciplinary optimization design on each design variable and obtain the optimization scheme. The invention can design and match reasonable suspension system parameters, and can simultaneously meet the requirements of braking vibration performance and road noise performance.

Description

technical field [0001] The invention relates to a multidisciplinary optimization design, in particular to a multidisciplinary optimization design method for a suspension system based on brake vibration and road noise performance. Background technique [0002] Brake chatter is a periodic excited forced vibration caused by changes in the braking torque caused by the brake disc during the braking process. Its frequency has a certain relationship with the vehicle speed, usually 10-50Hz. Its vibration source is the brake subsystem, and the rear vibration is amplified by the transmission of the front suspension and steering system. The brake judder problem seriously affects the comfort of the vehicle. At the same time, the brake judder also accelerates the fatigue of related components, thereby affecting the safety of the car. Therefore, it is very important to control the performance of the brake judder. At present, there are two main aspects of research on brake judder at home ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/23G06F111/06G06F119/10G06F119/14
Inventor 苏永雷彭磊李学亮王卓昝建明许春铁
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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