Fault Detection in Gear Drives With Non-Stationary Rotational Speed - Part Ii: The Time-Quefrency Approach

Meltzer, G.; IVANOV, Yu.Ye.

doi:10.1006/mssp.2002.1531

Cited by 47 publications

(15 citation statements)

References 6 publications

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“…This approach was experimentally validated. Using the time-frequency and the time-quefrency approaches, Meltzer and Ivanov [11,12] studied experimentally the effect of gear tooth defects during a fast run up and run down on three stages of planetary gear.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behaviour of Back to Back Planetary Gear in Run Up and Run Down Transient Regimes

et al. 2015

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The operating cycle of planetary gear transmissions is composed by the run up regime, steady state regime with fixed speed and the run down regime. Run up and run down are one of the main non stationary excitations for planetary gearboxes. This paper investigates, in these two regimes, the dynamic behaviour of a special configuration of two stages planetary gear which are mounted back-to-back. A dynamic model is developed. The variability of speed in the run up and run down regimes is included in the model. The computation of the dynamic response shows that additional sidebands instability zones are generated. Using the Short Time Fourier Transform, an amplitude-frequency modulation is observed in the non stationary condition. An experimental study done on a back-to-back planetary gear test rig is conducted for validation of the mathematic model.

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Section: Introductionmentioning

confidence: 99%

Dynamic Behaviour of Back to Back Planetary Gear in Run Up and Run Down Transient Regimes

et al. 2015

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“…Fixed time sampling cannot cope with the varying rotational frequency of the machine, resulting in increasing leakage error and spectral smearing. Therefore, most of the conventional methods for signal processing become inappropriate when monitoring the vibrations of varying speed machinery [1][2][3][4]. Non-stationary vibrations signals from varying speed machinery may include more abundant information about its condition.…”

Section: Introductionmentioning

confidence: 99%

Gear Fault Monitoring Based on Order Tracking and Bi-spectrum under Running-Up Condition

2007

Fourth International Conference on Fuzzy Systems and Knowledge Discovery (FSKD 2007)

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This paper deals with the detection of gear crack faults in gearbox under non-stationary run-up of gear drives. In order to process the non-stationary vibration signals such as run-up or run-down vibration signals effectively, the order bi-spectrum technique is presented. This new method combines computed order tracking technique with bi-spectrum analysis. Firstly, the vibration signal is sampled at constant time increments during run-up of gearbox and then uses numerical techniques to resample the data at constant angle increments. Therefore, the vibration signals are transformed from the time domain transient signal to angle domain stationary one. In the end, the resampled signals are processed by bi-spectrum analysis method. The experimental results show that order tracking and bi-spectrum technique can effectively diagnosis the gear faults.

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Section: Introductionmentioning

confidence: 99%

Gear Fault Diagnosis Based on Order Tracking and Degree of Cyclostationarity

2009

2009 2nd International Congress on Image and Signal Processing

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The Degree of Cyclostationarity technique is introduced and applied effectively to gearbox faults diagnosis under run-up condition. This new method combines order tracking technique with second order cyclo-stationary statistics analysis. The resampling signal can be obtained by resampling of the vibration signal that has been sampled in the time domain. Therefore, the time domain transient signal is transformed into angle domain stationary signal. In the end, the resampled signals are processed by Degree of Cyclostationarity technique. The experimental results show that Degree of Cyclostationarity technique can effectively diagnosis the faults of the gear crack.

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Fault Detection in Gear Drives With Non-Stationary Rotational Speed - Part Ii: The Time-Quefrency Approach

Cited by 47 publications

References 6 publications

Dynamic Behaviour of Back to Back Planetary Gear in Run Up and Run Down Transient Regimes

Dynamic Behaviour of Back to Back Planetary Gear in Run Up and Run Down Transient Regimes

Gear Fault Monitoring Based on Order Tracking and Bi-spectrum under Running-Up Condition

Gear Fault Diagnosis Based on Order Tracking and Degree of Cyclostationarity

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