Modeling the Transmission Path Effect in a Planetary Gearbox

Oussama Graja, Bacem Zghal, Kajetan Dziedziech, Fakher Chaari, Adam Jablonski, Tomasz Barszcz, Mohamed Haddar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


In such mechanical systems, as helicopters and self-propelled cranes, designers need to use gearboxes which have an important reduction ratio within compact space. Hence, planetary gearboxes are widely used. Consequently, its monitoring presents an important task for researchers and engineers either in healthy or damaged case. Many researchers are interested on the investigation of the modulation phenomenon in planetary gearbox. It is presented in a frequency representation as side-band activity near to the gear-mesh frequency component and its harmonics. In a healthy case, the origin of this phenomenon in a planetary gearbox (stationary ring) is that the transducer, which is mounted on the external housing of the ring gear, perceived signals from all components including sun-gear, ring-gear, carrier and planet-gears which can occupy different position in one carrier period rotation. Hence, when the planet comes closer to the sensor, the vibration signal increases and vice-versa. In this work, a two dimensional linear lumped parameter model is proposed to model vibration sources. A mathematical formulation of the transmission path is introduced in order to model only the amplitude modulation phenomenon due to the change of the planet-gear position since the speed of the sun is constant. A frequency representation of numerical results is presented and analyzed.

Original languageEnglish
Title of host publicationRotating Machinery and Signal Processing
Subtitle of host publicationProceedings of the First Workshop on Signal Processing Applied to Rotating Machinery Diagnostics, SIGPROMD’2017, April 09-11, 2017, Setif, Algeria
EditorsAhmed Felkaoui, Fakher Chaari, Mohamed Haddar
PublisherSpringer, Cham
Number of pages7
ISBN (Electronic)9783319961811
ISBN (Print)9783319961804, 9783030071493
Publication statusPublished - 20 Jul 2018
Externally publishedYes
Event1st Workshop on Signal Processing Applied to Rotating Machinery Diagnostics - Setif, Algeria
Duration: 9 Apr 201711 Apr 2017
Conference number: 1

Publication series

NameApplied Condition Monitoring
PublisherSpringer Cham
VolumeACM 12
ISSN (Print)2363-698X
ISSN (Electronic)2363-6998


Conference1st Workshop on Signal Processing Applied to Rotating Machinery Diagnostics
Abbreviated titleSIGPROMD 2017

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