减速器振动信号的冲击性振动信号往往可以与故障引起的冲击联系在一起，因此冲击性信号可以作为一个故障的表征形式。
Impulsive vibration signals in gearbox are often associated with impulse resulted from faults, and thus, impulsive signals can be used as the symptoms of faults.
并以此为基础运用气路分析原理，选取表征发动机性能参数变化的症兆变量和测量参数，建立了发动机故障诊断小偏差方程。
A fault diagnosis equation for the twin-spool mixed flow turbofan engine was established based on the simulation and gas path analysis.
讨论了相对时相所包含的故障信息及在不同故障种类中的表征。
The features of the fault information included in the relative time phase were discussed, and the appearance of the information from various faults described.
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