Feature Enhancement of Diesel Engine&rsquo; Piston-Cylinder Wear-out Fault Based on Teager Energy Operator

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (15) : 84-89.

Feature Enhancement of Diesel Engine’ Piston-Cylinder Wear-out Fault Based on Teager Energy Operator

ZHOU Bin1,2, JIN Shi-jiu1 , MEI Jian-min2 , SHEN Hong2

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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

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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[J]. Journal of Vibration and Shock, 2017, 36(15): 84-89

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