【摘要】 频谱细化技术和功率倒频谱是振动信号分析的两种重要辅助方法.采用细化处理,可以对信号频谱上感兴趣的一段频带进行“局部放大”,从而提高频率分辨率;倒频谱可以识别信号中较弱的周期成分,并对识别调制信号的边频县有特殊的效果.本文在介绍这两种方法基本原理的基础上,运用工程实例说明了其在振动信号分析中的实际应用效果.更多还原

【Abstract】 Spectrum zoom technique and power cepstrum are two important aided methods in vibration signal analysis. Using spectrum zoom technique the interested frequency band of signal spectrum can be amplified partially, the frequency resolution ratio can be increased. Using power cepstrum the weaker periodic signal can be recognized, and the side frequency of modulation signal can be recognized effectively. This paper introduces the basic principle about these two methods, and illustrates the practical application effect in vibration signal analysis by engineering examples.更多还原