Coherence Analysis of Inputs Using Multiple Correlated Subsystem-inputs System Modeling

China Mechanical Engineering ›› 2010, Vol. 21 ›› Issue (21): 2609-2613.

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Coherence Analysis of Inputs Using Multiple Correlated Subsystem-inputs System Modeling

An Mujin;Li Shunming;Zhang Yuanyuan;Liu Jianya

Nanjing University of Aeronautics and Astronautics, Nanjing, 210016

Online:2010-11-10 Published:2010-11-12
Supported by:

National Natural Science Foundation of China（No. 50675099）;
Jiangsu Provincial Natural Science Foundation of China（No. BK2007197）

多相关子系统输入中输入的相干性分析

安木金;李舜酩;张袁元;刘建娅

南京航空航天大学，南京，210016

基金资助:
国家自然科学基金资助项目(50675099)；江苏省自然科学基金资助项目(BK2007197)
National Natural Science Foundation of China（No. 50675099）;
Jiangsu Provincial Natural Science Foundation of China（No. BK2007197）

Abstract

Abstract:

A subsystem-input/single-output system model was proposed，then the correlation among inputs was analyzed, which was in two correlated subsystem-inputs/single-output system, and the input relationship after average process was given. On the basis of above, the correlation among inputs was derived, which was in multi correlated subsystem-inputs/single-output system and a model after average process was proposed. A collective average method was used, which can make the order coherence turn into a no order one, hence an exact modeling was obtained, and this was prepared for the further analysis to know the contribution of subsystem-inputs. Finally, the results of an automobile vibration test data were given, the theoretical analysis was verified.

Key words: subsystem-input, coherence, order, no order

摘要：

建立了子系统输入单输出系统模型，分析了两相关子系统输入单输出系统中各级输入之间的相关关系，给出了集合平均的输入关系式。在此基础上推导了多相关子系统输入各级输入之间的相关关系和集合平均输入模型。利用集合平均法使相干分析由子系统有序输入变为无序输入，得出了合乎实际的模型，为进一步分析子系统各级输入对单输出的贡献大小创造了条件。最后给出了某汽车振动试验数据的处理结果，对理论分析进行了验证。

关键词:

子系统输入, 相干性, 有序, 无序

CLC Number:

AN Mu-Jin, LI Shun-Ming, ZHANG Yuan-Yuan, LIU Jian-Ya.

Coherence Analysis of Inputs Using Multiple Correlated Subsystem-inputs System Modeling

[J]. China Mechanical Engineering, 2010, 21(21): 2609-2613.

安木金, 李舜酩, 张袁元, 刘建娅.

多相关子系统输入中输入的相干性分析

[J]. 中国机械工程, 2010, 21(21): 2609-2613.

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Coherence Analysis of Inputs Using Multiple Correlated Subsystem-inputs System Modeling

多相关子系统输入中输入的相干性分析

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