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Experimental Diagnosis of Eccentricity Faults in a Dynamic Gear System Using Model-Based Approaches

Experimental Diagnosis of Eccentricity Faults in a Dynamic Gear System Using Model-Based Approaches
	© 2025 by IJETT Journal
	Volume-73 Issue-6
	Year of Publication : 2025
	Author : Yakeu Happi Kemajou Herbert, Tchomeni Kouejou Bernard Xavier, Alfayo Anyika Alugongo
	DOI : 10.14445/22315381/IJETT-V73I6P118

How to Cite?
Yakeu Happi Kemajou Herbert, Tchomeni Kouejou Bernard Xavier, Alfayo Anyika Alugongo, "Experimental Diagnosis of Eccentricity Faults in a Dynamic Gear System Using Model-Based Approaches," International Journal of Engineering Trends and Technology, vol. 73, no. 6, pp.214-224, 2025. Crossref, https://doi.org/10.14445/22315381/IJETT-V73I6P118

Abstract
In this paper, an experimental study was conducted on a gear mechanism with eccentricity anomalies, emphasising advanced time-frequency domain methods to improve the diagnosis. Vibrations captured under various operating conditions were examined using RPM-frequency mapping, Short-Time Fourier transform (STFT), 3D waterfall FFT, and 3D Time-Frequency analysis. These techniques allowed for more accurate detection of eccentricity signs, including its impact on the interaction between gears and transmission performance. The results showed that elaborate phenomena such as intense modulation and nonlinear behaviors complicate accurate fault detection using traditional methods based solely on time and frequency domain. However, the multidimensional method adopted here allows for highlighting localised signal indicators that are directly associated with transmission disturbances due to eccentricity. This work, therefore, highlights the need to apply time-frequency methods to monitor the condition of gears and optimize their maintenance more effectively.

Keywords
Eccentricity fault, Gear mesh stiffness, RPM-frequency map – STFT, 3D time frequency, Transmission error, Two-stage spur gear system, 3D waterfall FFT.

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