【实例简介】

利用MatLab-Simulink 仿真

了不同减振器阻尼系数和不同悬架刚度下车身加速

度、悬架动挠度、车轮动载分别对于路面速度激励振动

响应的幅频特性, 从而为半主动悬架和主动悬架的优

化提供必要的理论支持.关于汽车振动与MATLAB的案例，大家都可以下载看看，

3

M at lab

47

2基于 Simulink车辆振动响应幅频

特性分析

Simulink

Add2

To Workspace

S

S

1/m, Integrator Integrator/ To

o Workspace2

Add1

k

Add

k

Add3 1/m Integrator Integrator

To Workspace 1

Add4

Derivative To Workspace3

Random

To Workspace

Number

Simulink

2.2

2000N/(m/s)

k

16300N/m10000

1000N/(m/s)

N/m

6、7

21994-2014ChinaAcademicJournalelEctronicPublishinghoUseAllrightsreservedhttp://www.cnki.net

°48°

2011

……计计……

c=1000N/(m/s)Fi

……+…+-计+……+…==c=2000Nm/s)

k=16300N/m

4+

=k=10000N/m

4-…今…+---

…4-}-4

-11

艾也

÷…+-

10

:::

10

激振频率H

10

激振频率|H

图3车身加速度对于路面速度激励的幅频特性

图6车身加速度对于路面速度激励的幅频特性

c=1000N(m/s

=·c=2000N/(m/s)

10°…

1…1-

三

馨

}-1-44}H4

k=16300N/m

k=10000N/m

10

10

10

激振频率/Hz

激振频率|Hz

图4车轮动载对于路面速度激励的幅频特性

图7车轮动载对于路面速度激励的幅频特性

:

C=1000N(m/s)

k=16300N/m

空…

::=200m0)1

A

#:k=1000Nm

10鞋装

1°目

非

…4…

暮10目

……

10时时排时计e时:

10

10

10

10

10

10

10

微振频率|Hz

激振频率Hz

图5悬架动挠度对于路面速度激励的幅频特性

图8悬架动挠度对于路面速度激励的幅频特性

?1994-2014ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net

3

M at lab

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3结语

1/4

Simulink

[η靳跷雄.汽车振动分杌M].上海:同济大学出版社,2002:92-9

[2余志生.汽车理谢M].北京:机械工业出版社,2006230-232

[3丁玉庆.汽车振动系统的简化及数学模型的建立[J.南京理工大学学报,2001,25(4:391-394

[4朱明武,李永新测试信号处理与分析[M].北京:北京航空航天大学出版社,206:92-10

S李丽莉,过永德汽车振动系统的简化及其响应模拟].华北工学院学报,195,16(2):147-149.

[常巍,谢光军,黄朝风. Matlab2007基础与提髙M].北京:电子工业出版社,2007:253-257.

Amplitude- requency Characteristic Analysis of Vehicle vibration

Response Based on Matlab

ChEN Jun-ie li Zhao-kai, fan Chuan-shuai, LIU Wei

Chang an University, Xi an 710061, China)

Abstract: In order to research amplitude- frequency characteristic of vehicle vibration response, using the lagrange e

quation to establish quarter vehical geometry model and design the simulation prog ram in Simulink according to the above

mathematical model. The result s indicate that the proper increasing of shock absorber damping can effectively reduce the

dy namic load between the wheels and pavement. But, the increasing of Suspension s tiffness makes the ride comfort go bad

The conclusion of this paper can provide some reference value with which can improve the vehicle smooth and safety

Key words: vehicle vibralion; vehicle running smo othness; MalLab-Simulink; am plitude-requency char

acteria tic

?1994-2014ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net

【实例截图】

【核心代码】