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Method for recognizing car suspension vibration transmission path and contribution amount

A technology of automobile suspension and vibration transmission, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that different path force responses and acceleration responses cannot be directly superimposed, and achieve strong operability

Active Publication Date: 2017-04-26
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the vehicle vibration system, the traditional transmission path analysis method usually uses generalized force or generalized acceleration as a variable, but due to the difference in direction and unit, the force response and acceleration response of different paths cannot be directly superimposed

Method used

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  • Method for recognizing car suspension vibration transmission path and contribution amount
  • Method for recognizing car suspension vibration transmission path and contribution amount
  • Method for recognizing car suspension vibration transmission path and contribution amount

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and an example of a MacPherson suspension.

[0041] Such as figure 1 As shown, a vehicle suspension vibration transmission path and contribution identification method. The method starts from the essence of vibration and analyzes the vibration transmission characteristics of the vehicle suspension system from the energy perspective based on the vibration power flow analysis, including the following steps:

[0042] Step 1. Establish the transmission path analysis model of the automobile suspension, and use the multi-body dynamics analysis software ADAMS to establish the multi-body dynamic model of the automobile MacPherson suspension system (see figure 2 ), the lower control arm point is connected to the body through bushings B1 and B2, and the shock absorber and the upper end of the suspension spring are connected to the body through Top Mount (hereinafter denoted by ...

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Abstract

The present invention discloses a method for recognizing a car suspension vibration transmission path and contribution amount. The method comprises the steps of building a car suspension multi-body dynamics analysis model by using simulation software; setting an input output channel in a virtual test bench and performing vibration simulation; acquiring system speed admittance; calculating response of force and speed input into a car body; calculating to obtain a power flow input into the car body from each path; and performing list ranking on total power flow values of all paths that are obtained through calculation and are within a frequency research range, so as to analyze impact of each path on the vibration response of the suspension system. According to the method, the power flow is used as a uniform value to describe the vibration transmission process of the suspension system, the power flow represents vibration response in a form of scalar, and different transmission paths are not limited by directions and units any longer; and an absolute value of vibration transmission is obtained by using the power flow, and the power flow of a connection interface focused by the system is lowered so as to achieve shock absorption.

Description

Technical field [0001] The invention relates to a method for solving the problems of vehicle vibration and noise, in particular to a method for identifying and sorting the vibration path transmission and contribution of the vehicle suspension system and finding the main transmission path. Background technique [0002] As the car’s ride comfort has been valued by people, NVH performance represented by noise, vibration and harshness has become one of the important indicators of car competitiveness. The vibration isolation performance of the suspension has a great influence on the NVH performance of the vehicle. Various vibration excitations from the road are introduced into the car through the suspension bushing (rubber bushing or hydraulic bushing), the upper end support of the shock absorber (TopMount, rubber or hydraulic type Top Mount) and other rubber damping elements (or) For the body, how to design the stiffness and resistance characteristics of the suspension bushing and T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20G06F2119/06Y02T90/00
Inventor 陈成峰上官文斌
Owner SOUTH CHINA UNIV OF TECH
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