Dynamics-Based Vibration Signal Modeling for Tooth Fault Diagnosis of Planetary Gearboxes

Abstract

Vibration analysis has been widely used to diagnose gear tooth fault inside a planetary gearbox. However, the vibration characteristics of a planetary gearbox are very complicated. Inside a planetary gearbox, there are multiple vibration sources as several sunplanet gear pairs, and several ring-planet gear pairs are meshing simultaneously. In addition, due to the rotation of the carrier, distance varies between vibration sources and a transducer installed on the planetary gearbox housing. Dynamics-based vibration signal modeling techniques can simulate the vibration signals of a planetary gearbox and reveal the signal generation mechanism and fault features effectively. However, these techniques are basically in the theoretical development stage. Comprehensive experimental validations are required for their future applications in real systems. This chapter describes the methodologies related to vibration signal modeling of a planetary gear set for gear tooth damage diagnosis. The main contents include gear mesh stiffness evaluation, gear tooth crack modeling, dynamic modeling of a planetary gear set, vibration source modeling, modeling of transmission path effect due to the rotation of the carrier, sensor perceived vibration signal modeling, and vibration signal decomposition techniques. The methods presented in this chapter can help understand the vibration properties of planetary gearboxes and give insights into developing new signal processing methods for gear tooth damage diagnosis.

Weighted sparse representation based on failure dynamics simulation for planetary gearbox fault diagnosis

“…Ruo-Bin Sun 1,2 , Zhi-Bo Yang 1,2,3 , Wei Luo 1,2 , Bai-Jie Qiao 1,2 and Xue-Feng Chen 1,2 utilized time domain synchronous averaging, the classical gear fault diagnosis method, and calculated the tooth vibration of the individual planets and of the sun in an epicyclic gearbox. He also proposed interpolation techniques for time domain averaging to further improve the algorithm performance [3].…”

“…In general, the planets not only revolve on their own axes but also rotate around the sun. Multiple pairs of gears participate in the transmission to make planetary sets have a higher load capacity and larger transmission ratio with equal or smaller volume [1]. However, extreme operating conditions cause frequent component failures, which may cause catastrophic accidents.…”

Micro and Macroscopic Analysis of Fatigue Wear of Gear Wheel Top Layer – an Impact Analysis of Thermochemical Treatment

“…The tests were based both on numerical as well as experimental data. Besides, there are other publications, in which selected diagnostic methods, concerning an assessment of gear wheels condition -a detection of damages during an operation of a pump or of a gear -without any disassembly [14][15][16][17], are presented.…”

Micro and Macroscopic Analysis of Fatigue Wear of Gear Wheel Top Layer – an Impact Analysis of Thermochemical Treatment

“…The tests were based both on numerical as well as experimental data. Besides, there are other publications, in which selected diagnostic methods, concerning an assessment of gear wheels condition -a detection of damages during an operation of a pump or of a gear -without any disassembly [10][11][12][13], are presented.…”