This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Principal Measurement Inaccuracies of Pin-on-Disc Testers and Associated Mitigation Efforts
Technical Paper
2017-01-2497
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The Automated Universal Tribotester (AUT) is developed by the Institute of Dynamics and Vibrations (TU Braunschweig) and represents a reduced scale brake dynamometer. The setup is based on the pin-on-disc principle and the down-scaled test specimen are brought to contact to the disc and loaded via the specifically designed load unit. The AUT’s load unit is designed as a combination of parallel and serial leaf springs, resulting in a friction free motion. The stiffnesses in radial and tangential directions are much higher than in normal orientation. For the investigation of wear debris over time, changes in loads (e.g. forces, speeds, temperatures) are applied. Those varying loads result in tilting of the contact surface of the test specimen due to small elastic deformations. A change of the contact area is inevitable, and long time periods are needed to adopt the contact area to the new conditions. This prevents from investigating fast changes in the above mentioned loads. This paper gives an adaptive approach to address this problem. A passive optimization of the springs and the geometrical layout lead to improvements, but dynamic changes cannot be taken into account. This dynamic behavior results from variations of the procedure or the dynamic of the coefficient of friction itself, and their rate of change is obviously different. Therefore, an adaptive influence on tilting the AUT’s load unit is necessary. It is designed to have an additional degree of freedom, with actuators implemented in the modified mounting of the load unit.
Citation
Ostermeyer, G. and Vogel, A., "Principal Measurement Inaccuracies of Pin-on-Disc Testers and Associated Mitigation Efforts," SAE Technical Paper 2017-01-2497, 2017, https://doi.org/10.4271/2017-01-2497.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Ostermeyer G.-P. , Schramm T. , Raczek S. , Bubser F. and Perzborn N. The Automated Universal Tribotester EB2015-STQ-016 2015
- Schramm T. and Ostermeyer G.-P. Automated Brake Pad Surface Topography Measurement Using The AUT EB2016-SVM-023 2016
- Ostermeyer G.-P. On the dynamics of the friction coefficient WEAR 254 2003
- Perzborn N. and Ostermeyer G.-P. On the description and measurement of the friction coefficient in models of multibody dynamics PAMM 11.1 2011
- Physik Instrumente (PI) GmbH & Co. KG P-878 DuraAct Power Flächenwandler 2017 https://www.physikinstrumente.de/de/produkte/piezokeramische-aktoren/flaechenwandler/p-878-duraact-power-flaechenwandler-101795/
- wenglor sensoric GmbH IW045CM65MG3 2017 https://www.wenglor.com/index.php?L=1&id=1148&tx_wsshoploader_pi1[url]=catalog/productDetail.jsf;;wecappid::Shop_1000_EXT_DE;;weclocale::de_DE;;itemKey::IW045CM65MG3;;ifr::y
- Ostermeyer , G. and Perzborn , N. Dynamic Friction Measurements, Especially for High Power Applications SAE Technical Paper 2011-01-2373 2011 10.4271/2011-01-2373