Design and Realization of Aircraft Engine Wire Fault Detection Database

Abstract

The engine is the core part of an airplane and its wire performance has a direct important impact on the safety. The detection of the engine wire fault costs much time and effort in the maintenance nowadays. Based on that, the technical data are well determined in the database of the fault diagnosis on airplane engine wire is presented in this paper. And furthermore, the function and operation of the database are given too. The time can be reduced and the efficiency can be improved significantly in maintenance by utilizing the database presented in this paper.

The Engine Fault Diagnosis Based on Time Domain and Frequency Domain

“…By contrasting the characteristic parameters of Table 1 in the normal state and fault conditions can be seen that RMS changes in the event of failure are not large; Skewness and skewness index decrease significantly, they indicate that the probability density curve gravity center of failure signal is very asymmetry; Kurtosis changes evidence, kurtosis indicators correspondingly increase or decrease, it indicates that the convex of the probability density curve peak has changed, and the occurrence of local or overall defects; variance significantly increase or decrease descript the fluctuation is relatively large of the signal vibration amplitude; margin index decreases when the left 1 and right 6 cylinders off the oil, it indicates the signal impacts weakened; waveform index changes a little, it indicates its stability is good [3] . The Characteristic Parameter Extraction of the Vibration Signal in the Frequency Domain Time-domain analysis is generally used only for simple diagnosis, and frequency domain analysis can determine the failure position.…”