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Analysis of dynamic transmission error and noise from a two-stage gearbox
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH , 2005. , 14 p.
Series
Trita-AVE, ISSN 1651-7660 ; 2005:34
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-488OAI: oai:DiVA.org:kth-488DiVA: diva2:14196
Presentation
2005-11-17, Seminarierum 74, Teknikringen 8, Stockholm, 13:15
Opponent
Supervisors
Note
QC 20101130Available from: 2005-11-11 Created: 2005-11-11 Last updated: 2010-11-30Bibliographically approved
List of papers
1. Analysis of gear noise and dynamic transmission error measurements
Open this publication in new window or tab >>Analysis of gear noise and dynamic transmission error measurements
2004 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Measurements of dynamic transmission error (DTE) and noise have been performed on a truck gearbox. The DTE is related to the dynamic properties of the complete gear system. To investigate the coupling between noise and DTE, the correlation between noise and DTE is calculated for fixed speeds, as the torque is increased. The highest correlation is found for the low split gear pair, which is located closest to the gearbox housing. When the correlation is low, one of the reasons can be a resonance of the shafts, although not all resonances effect the correlation between noise and DTE. The DTE is also compared to calculated static TE for the gear teeth. Both the DTE and noise for the fifth gear increases as the torque is increased. The calculated static TE shows the opposite trend and decreases as the torque is increased.

Place, publisher, year, edition, pages
New York: ASME, 2004
Keyword
Gears, Gear noise, transmission error
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-11842 (URN)2-s2.0-19544385769 (Scopus ID)
Conference
2004 ASME International Mechanical Engineering Conference
Note
QC 20100719Available from: 2010-01-12 Created: 2010-01-08 Last updated: 2010-11-30Bibliographically approved
2. On model of gearbox noise and dynamic transmission error
Open this publication in new window or tab >>On model of gearbox noise and dynamic transmission error
2005 (English)In: Twelfth International Congresson Sound and Vibration, 2005, 3198-3205 p.Conference paper, Published paper (Refereed)
Abstract [en]

Gearbox is an important noise source in automotive industry. Dynamic Transmission Error(DTE) describes the dynamic behaviour of the complete gear system and is closely related tothe vibrations of, and hence the noise radiated from, a gearbox. The coherence between DTEand noise radiated has been investigated previously and promising results have been obtained.The paper focuses on the models of DTE and the gearbox noise and the relation betweenthem. In order to understand the behaviour of the signals, a simple model is drawn whereDTE is modelled as the excitation source of a gear system. When the speed of rotation is notextremely high, DTE is expected to be independent of the speed of rotation when theobservation points are located on the wheel. On the other hand, the radiated sound isexpected to increase at the rate of 6 dB per double of the rotation speed, although a bigfluctuation is also expected due to the influence of the shifted frequency and hence thedifferent transfer function. Experimental data is analysed. The dynamic transmission errormeasured on a truck gearbox is separated into deterministic parts and a stochastic part. Theapplied torque has little influence on the averaged DTE of the whole gear because of the highstiffness. However, when the averaged DTE of a single tooth is concerned, the influence ofthe applied torque is rather obvious. The predicted trend of the radiated sound pressure isalso seen in the measured data.

Series
12th International Congress on Sound and Vibration 2005, ICSV 2005, Volume 4
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-11854 (URN)2-s2.0-84881596980 (Scopus ID)978-162748149-6 (ISBN)
Conference
Twelfth International Congress on Sound and Vibration, 11-14 July Lisbon
Note

QC 20100719

Available from: 2010-01-12 Created: 2010-01-12 Last updated: 2014-09-29Bibliographically approved
3. Analysis of Gear Noise and Dynamic Transmission Error Using a Recursive Kalman Filter Algorithm
Open this publication in new window or tab >>Analysis of Gear Noise and Dynamic Transmission Error Using a Recursive Kalman Filter Algorithm
(English)In: International Journal of Acoustics and Vibration, ISSN 1027-5851Article in journal (Other academic) Submitted
Abstract [en]

Measurements of dynamic transmission error (DTE) and gear noise have been usedto investigate the relation between DTE and noise. A Kalman filter order trackingmethod was used to calculate the amplitudes of the gear mesh orders. The DTE showsnon-linear behaviour with rotating speed , which decreases as the torque is increased.There seems to be a linear relationship between noise and DTE for the higher torquesmeasured. This indicates that for the higher torques measured, a linear model can beused to predict the dynamic behaviour of the gear system.

National Category
Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-11855 (URN)
Note

QCR 20161212

Available from: 2010-01-12 Created: 2010-01-12 Last updated: 2016-12-12Bibliographically approved

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