【摘要】 在回转和往复机械的状态监测和故障诊断中，时域同步平均可有效衰减与回转频率无关的干扰，提取与工作状态直接相关的周期信号，是一种非常有用的信号分析和预处理技术。本文对时域同步平均的梳形滤波器特性，实际操作中采用频率跟踪的必要性，实现频率跟踪的不同技术方案等几方面进行了论述和分析。实验分析结果表明了这一技术的有效性和可行性更多还原

【Abstract】 Time domain synchronous averaging can be a useful signal analysis and pre proceeding technique in condition monitoring and fault diagnosis of rotating and reciprocating machines. It reduces the signals not coherent to rotation frequency effectively, and extracts the repetitive signals directly related to machine operation condition. This paper discusses the comb filtering characteristics of time domain synchronous averaging and the necessity of using frequency tracking in the signal analysis procedure, and presents different means to realize frequency tracking. Analysis results show the effectiveness and feasibility of this technique in engineering practice.更多还原