Modeling the Transmission Path in a Planetary Gearbox: A Comparison of Two Methods

Oussama Graja, Ahmed Ghorbel, Fakher Chaari, Mohamed Haddar

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

2 Citations (Scopus)


When the goal is to reduce the shaft speed with an important ratio between a driving and a driven part, engineers use a planetary gearbox (PG). For this reason, this power transmission system can be found in many mechanical units such as excavators, helicopters, ship propeller, etc. Hence, their condition-based monitoring has been investigated for decades and their diagnostic is still important since their breakdown can cause catastrophes and disasters. So, researchers have been interested in the difference between healthy and damaged cases PG dynamic behaviour. Due to its complex design, the knowledge of its healthy state is still investigated: as known, planet gears have two rotational motions: first one is around itself and the second one is around the gearbox centre. The last motion amplitude modulates the vibration signal acquired by a sensor attached to the housing. Hence, in this work, the variable transmission path in a planetary gearbox is modelled by two mathematical approaches. One of the above methods can be used when the amplitude modulation phenomenon is explicitly modelled from the dynamic model, in other words, when someone thinks to use a windowing function to model amplitude modulation phenomenon in a planetary gearbox. Advantages and drawbacks of each methodology are investigated.

Original languageEnglish
Title of host publicationMechatronics 4.0
Subtitle of host publicationProceedings of the First International Workshop on Mechatronics 4.0, June 8–9, 2019, Mahdia, Tunisia
EditorsMaher Barkallah, Jean-Yves Choley, Jamel Louati, Omar Ayadi, Fakher Chaari, Mohamed Haddar
PublisherSpringer, Cham
Number of pages10
ISBN (Electronic)9783030467296
ISBN (Print)9783030467289
Publication statusPublished - 31 May 2020
Externally publishedYes
Event1st International Workshop on Mechatronics 4.0 - Mahdia, Tunisia
Duration: 8 Jun 20199 Jun 2019
Conference number: 1

Publication series

NameLecture Notes in Mechanical Engineering
PublisherSpringer Cham
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


Conference1st International Workshop on Mechatronics 4.0
Abbreviated titleMECHATRONICS 2019

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