| 基于小波分析及ITD法识别气缸内气体压力 |
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| 引用本文： | 陈国金. 基于小波分析及ITD法识别气缸内气体压力[J]. 内燃机工程, 2002, 23(3): 71-75 |
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| 作者姓名： | 陈国金 |
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| 作者单位： | 杭州电子工业学院,杭州,310037 |
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| 摘 要： | 基于小波分析及Ibrahim时域法ITD（Ibrahim Time Domain)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供了行之有效的方法。
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| 关 键 词： | 小波分析 缸内气体压力 ITD 振动 内燃机 |
| 文章编号： | 1000-0925(2002)03-071-05 |
Identification of In-Cylinder Pressure Based on Wavelet Analysis and ITD Method |
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| Chen Guojin. Identification of In-Cylinder Pressure Based on Wavelet Analysis and ITD Method[J]. Chinese Internal Combustion Engine Engineering, 2002, 23(3): 71-75 |
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| Authors: | Chen Guojin |
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| Abstract: | 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. |
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| Keywords: | Wavelet Analysis In Cylinder Pressure ITD Vibration Internal Combustion Engine |
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