| 内燃机气缸压力的振动信号倒谱识别方法 |
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| 引用本文： | 刘世元,李锡文,杜润生,杨叔子.内燃机气缸压力的振动信号倒谱识别方法[J].华中科技大学学报(自然科学版),1998(6). |
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| 作者姓名： | 刘世元 李锡文 杜润生 杨叔子 |
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| 作者单位： | 华中理工大学机械科学与工程学院 |
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| 基金项目： | 中国船舶工业总公司国防科技预研资助项目 |
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| 摘 要： | 分析了内燃机缸盖系统的传递特性，提出了利用缸盖表面振动信号识别气缸压力的倒谱分析方法．通过倒谱开窗并进行平滑处理，使测量的振动信号和计算的传递函数更具鲁棒性，可以消除传感器测点位置和内燃机运行工况等敏感因素的影响．实验及分析结果表明了这种方法的可行性和有效性．
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| 关 键 词： | 内燃机 气缸压力 振动 倒谱分析 |
Identification of Engine Cylinder Pressure from Vibration Signals by Cepstral Analysis |
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| Liu Shiyuan Ph. D., College of Mech. Sci. & Eng.,HUST,Wuhan ,China. Li Xiwen Du Runsheng Yang Shuzi.Identification of Engine Cylinder Pressure from Vibration Signals by Cepstral Analysis[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1998(6). |
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| Authors: | Liu Shiyuan Ph D College of Mech Sci & Eng HUST Wuhan China Li Xiwen Du Runsheng Yang Shuzi |
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| Institution: | Liu Shiyuan Ph. D., College of Mech. Sci. & Eng.,HUST,Wuhan 430074,China. Li Xiwen Du Runsheng Yang Shuzi |
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| Abstract: | A unique signal processing technique has been developed for identification of engine cylinder pressure from cylinder head vibration signals. By cepstral windowing, the smoothed and robust transfer function of cylinder head is obtained and will help to construct engine cylinder pressure. Experimental results in a real world engine are presented and used to verity the theoretical developments. It is shown that this technique is practical to implement and provides the basis for engine diagnosis by vibration signals. |
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| Keywords: | internal combustion engine cylinder pressure vibration cepstral analysis |
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