多相关子系统输入中源识别的分析研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 78-82.

论文

多相关子系统输入中源识别的分析研究

安木金; 李舜酩; 缪小冬; 刘晓伟; 杜建建; 樊翠连

作者信息 +

Research of Source Identification Using Multi Correlated Subsystem-inputs System Modeling

An Mujin; Li Shunming; Miao Xiaodong; Liu Xiaowei; Du Jianjian; Fan Cuilian

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摘要

建立了子系统输入单输出系统模型，分析了双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。针对多相关子系统输入单输出系统中输入的源识别问题，分析了子系统各级输入各种相关情况下输入相关矩阵的数值变化以及对输出的影响，通过相干分析得到了判断子系统各级输入对输出贡献量的方法。最后给出了某汽车前后轴垂直平面内振动试验数据的处理结果，验证了理论分析的实用性。理论分析及试验对同类工程问题具有参考价值

Abstract

A subsystem-input/single-output system model is p.roposed，after that, the correlation between inputs is analyzed which in two subsystem-inputs/single-output system, and the input relationship after average process is given. On this basis, the correlation between inputs is derived which in multi correlated subsystem-inputs /single-output system and the model after average process is proposed. To address the source identification of inputs in multi correlated subsystem-inputs system, the value changes of correlated input matrix and the impact of the output in various relevant cases of input of subsystem-inputs are analyzed, and according to coherence analysis, the method to know the contribution of inputs to the output is obtained. Finally, the results of vibration test data are given, which is measured in a vertical plane of an automobile front and rear axes; the usefulness of the theoretical analysis is verified. Theoretical analysis and experiment are valuable reference for the same engineering problems

导出引用

安木金;李舜酩;缪小冬;刘晓伟;杜建建;樊翠连. 多相关子系统输入中源识别的分析研究[J]. 振动与冲击, 2011, 30(6): 78-82

An Mujin;Li Shunming;Miao Xiaodong;Liu Xiaowei;Du Jianjian;Fan Cuilian. Research of Source Identification Using Multi Correlated Subsystem-inputs System Modeling[J]. Journal of Vibration and Shock, 2011, 30(6): 78-82