At first, authors established an experimental system to acquire crankcase pressure signal and vibration acceleration signal.
通过搭建试验台架，从实车试验中获取曲轴箱压力信号和机身振动加速度信号；
The system could induce multi-channel vibration acceleration signals and complete signal filting, acquiring and analysis processing.
该系统能够感应多路振动加速度信号，同时完成对信号的滤波，采集和分析处理。
It is difficult to detect the periodic impulse component in the vibration acceleration signal with conventional analysis methods such as time domain wave and frequency spectrum.
通过时域波形和频谱等基本分析手段来探测振动加速度信号中的周期性冲击分量往往是困难的。
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