基于Teager算子的柴油机活塞-气缸磨损故障特征增强方法

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摘要柴油机活塞与气缸磨损情况是判断柴油机技术状态的主要指标，也是柴油机大修送修的主要条件，其监测诊断一直是柴油机维修的重点。由于但柴油机结构复杂，工作粗暴，活塞-气缸磨损故障很难有效监测诊断，尤其是活塞-气缸早期磨损故障，活塞-气缸磨损状况的更是监测诊断一直是研究的重点和的难点。本文根据活塞-气缸磨损后在工作中产生的冲击的特点特征，利用Teager算子提取瞬态冲击信号的优势，对柴油机怠速时缸体上部左侧振动信号进行Teager算子增强，通过提取出的Teager算子能量最大值，判断是否存在活塞-气缸磨损故障以及故障的严重程度。通过两种不同型号柴油机、不同故障缸的机体振动实测信号分析表明，该方法简便有效。

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	周斌 1
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	靳世久 1
	梅检民 2
	沈虹 2

关键词 ：故障诊断, Teager算子, 特征增强, 柴油机

Abstract：The wear status of piston-cylinder is a main indication of diagnosing technical state of diesel engine and main condition for diesel engine’s overhaul. Diagnosis of piston-cylinder fault, especially which of early wear fault, is difficult because diesel engine’s structure is complicate and working mode is rude, so diagnosis of piston-cylinder fault is the emphasis and difficult point. According to the impulse feature of piston-cylinder’s wear, Teager operator’s advantage of extracting instantaneous impulse signal is adopted to analyze vibration signal sampled from left-top position of cylinder as diesel engine idling, and extracted maximum of Teager operator energy is used to diagnose the piston-cylinder fault and serious degree. Analyzing results of actual vibration signal of two different type diesel and different fault cylinder show that the method is simple and effective.

Key words： Fault diagnosis Teager Energy Operator Feature enhancement Diesel engine

收稿日期: 2016-08-30 出版日期: 2017-07-28

引用本文:

周斌 1,2,靳世久 1,梅检民 2,沈虹 2. 基于Teager算子的柴油机活塞-气缸磨损故障特征增强方法[J]. 振动与冲击, 2017, 36(15): 84-89.
ZHOU Bin1,2, JIN Shi-jiu1,MEI Jian-min2,SHEN Hong2. Feature Enhancement of Diesel Engine’ Piston-Cylinder Wear-out Fault Based on Teager Energy Operator. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 84-89.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I15/84

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