摘要
把多元线性系统的偏相干分析看作是多元线性回归中相关分析的直接推广,得到了求复相干、偏复相干、偏相干以及各种相干功率谱的简化计算方法。避免了引进“残互谱”等物理意义模糊的概念。公式简单,编程容易。并讨论了偏相干函数、偏复相干函数在噪声源识别中的问题。给出了模拟飞机机舱噪声源识别的结果。
In this paper, by applying multivariate linear regression theory to multiple coherence analysis, a simplified way to compute multiple coherence function, paritial coherence function, partial multiple coherence function, as well as all types of coherent output spectra is presented. The vague concept of 'residual cross spectrum' has been avoided the formulas for computing are simple and easy to be programed. The problems in noise source identification by partial coherence function are discussed. The results for noise source identification in a simulated model are given.
出处
《声学学报》
EI
CSCD
北大核心
1991年第5期338-343,共6页
Acta Acustica
