【摘要】 在振动测试信号处理和模态分析中经常要用到各种相干族表达式(如相干函数,信噪比,模态置信准则等),仔细分析后发现这些表达式都可以通过Schwartz不等式经过变换得到.分析了相干族的表达式,运用Matlab对两自由度动力学系统各相干族表达式进行仿真分析,并介绍了相干族表达式在实践中的应用,有利于系统掌握相干族.更多还原

【Abstract】 The application of coherence concept in signal process and modal analysis in vibration testing used widely,(such as square coherence function,signal-noise ratio(SNR),modal analysis criteria(MAC),et.al).After seriously analysis,those expressions can be deduced from Schwartz inequality.This paper discusses the expressions of the coherence family.Use MATLAB to simulate with two-degree-of-freedom dynamic system,and gives examples of the applications of coherence family functions.Which help in comprehending coherence family functions systematically.更多还原