基于矢量振动信号的AR功率谱分析及应用  

AR Power Spectrum of Vector Vibration Signal and Its Application

作　　者：毕果[1] 韩捷[1] 梁川[1] 

机构地区：[1]郑州大学机械工程学院,河南郑州450002

出　　处：《郑州大学学报（工学版）》2003年第2期80-83,共4页Journal of Zhengzhou University（Engineering Science）

摘　　要：以矢谱分析为基础,提出了一种针对双通道振动信号的分析方法———矢功率谱分析.从矢谱基础理论出发,证实了转子同一截面上互相垂直的任意两个通道在各频率响应下的能量总和为一定值这一结论,并以此为前提给出矢功率谱分析的表示方法,然后利用参数模型功率谱估计中的AR模型实现了双通道数据集成的AR功率谱估计;因计算过程较为繁琐,提出简化算法,对两个信号的处理可以同步进行,最后用C++Builder5.0编程实现了这一分析方法,并用实际数据验证了其实用性.Based on the theory of vector spectrum, a new analysis method, vector power spectrum, aimed to signals of double channels, is proposed. Then a conclusion in theory is drawn: The sum of the energy of a pair of signals acquired from two discretional perpendicular channels on the same section is a constant on different point of frequency. As a basis, a better expression of vector power spectrum is brought forward. Then making use of AR model in the field of power spectrum estimate, we realize AR power spectrum aiming at the data fusion of the two channels. And considering the complexity of the calculation, we also put forward a way to simplify it, and process the two signals simultaneously. Finally, we design a program to realize the analysis method by C++ Builder 50,and a set of real data is used to test the practicability of the means.

关 键 词：矢量振动信号 AR功率谱 矢谱分析 矢功率谱分析 旋转机械 转子 自回归模型 

分 类 号：TB535[理学—物理] TH133[理学—声学]