Vibration Analysis of Gasoline Engine Faults

Abstract

Vibration analysis of engine faults is an approach to diagnose the engine condition. This study presents a study of vibration analysis of the normal engine and the engine with three different fault conditions. The gasoline engine was selected in this study. The accelerometer has been used at the surface of the engine to measure the vibration in the form of acceleration for all possible directions. Three conditions of engine faults including the engine that is not smooth while idling, the engine that goes missing while idling and the engine that has no power are selected. Five vibration signal parameters including fundamental frequency, long term spectrum, energy, long term cepstrum and zero crossing rate, are computed from all databases. The significant differences between normal engine and the fault engines are concluded. It can be obviously seen that the signal parameters are able to discriminate all three conditions and the engine with normal condition

Vibration Signal Analysis of a Motorcycle

“…The energy of the engine-running vibration signal often goes to infinity in accordance with the previous constraint. The calculation of the power of the signal is defined by using the sum of the square of the signal samples [17][18][19]. Mathematically, the averaged power of an aperiodic sequence x[n] is defined as the following equation.…”

“…The equallydivided sections of the root sum square values are therefore provided for all experiments. Subsequently, the extraction of vibration's attributes of averaged power of the vibration signal as mentioned in the previous section has been conducted [18][19]. Moreover, the averaged peak of the vibration signal is also extracted with the same conditions [20].…”