The angular vibration signals of ICE crankshaft contains a lot of information on power condition,it obtained the domestic and foreign widespread attention,and it is the front and research hot spot in fault diagnosis domain of ICE.

• 内燃机的曲轴角振动信号含有丰富的内燃机工作状态信息，因而得到了国内外的广泛关注，是目前内燃机故障诊断领域的前沿和研究热点。