矩阵信号生成模型相干分析法及其在空调机架振源识别中的应用

美国近代著名的信号处理学专家J.S.Bonclat谈到相干技术在源识别问题中的应用时指出:“偏相干分析的应用发展还不甚完美,但它为解决一些复杂的问题提供了一个非常有用的工具,在将来应当受到高度的重视。基于上述认识本文由空调机架的振动噪声分析抽象出一个多相关输入/单输出系统模型,针对这一模型,分析推导了一种“矩阵信号生成模型”的求解法。与其它方法相比,这一方法具有寻出结果易于解释和物理含意清晰的特点。刊用这一方法,作者对北京古桥牌空调机架的振源进行了识别,取得了满意的结果,找到了降低结构振动噪声的有效途径。

PARTIAL COHERENCE ANALYSIS METHOD USING SIGNAL FORMED FROM A MATRIX MODEL AND IT' S APPLICATION IN IDENTIFICATION OF SOURCE OF DYNAMIC EXCITATION OF THE CONDITIONER FRAME

Based on the analysis of an. air conditioner's vibration and noise, a multiple coherence input and single output system model is established. The solution of the model is found by using a new method--'signal formed from an matrix model". The method has the advantage of being understood easily and having cleaJ physical meaning. As a example for usege of the method, the identification of a vibration source of an air conditioner is made.