摘要
基于小波分析及Ibrahim时域法ITD(IbrahimTimeDomain)识别内燃机缸内气体压力 ,利用时域ITD法建立气缸盖振动的数学模型 ,并用小波分析方法对气缸盖振动响应信号进行有效的信噪分离 ,最后通过时域模态坐标转换识别内燃机缸内气体压力。由于振动信号信噪分离效果好 ,从而提高了缸内气体压力的识别精度 ,为内燃机工作状态的实时监测和故障早期预报提拱了行之有效的方法。
Concering the indentification of in cylinder pressure of internal combustion engines,the mathematical model of vibration on the cylinder cover is established firstly. Signal and noise of vibration on the cylinder cover is effectively separated by means of wavelet analysis secondly. Lastly,the in cylinder pressure of internal combustion engines is identified adoping time-domain modal transform method. Because the effect in seperation of signal and noise of vibration is good,identification of in cylinder pressure is accurate. It provided the effective method for real time condition detection and early stage fault diagnosis of internal combustion engines.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2002年第3期71-75,共5页
Chinese Internal Combustion Engine Engineering
关键词
小波分析
缸内气体压力
ITD
振动
内燃机
Wavelet Analysis
In Cylinder Pressure
ITD
Vibration
Internal Combustion Engine
