From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry
The benefits of angular sampling when measuring various signals in rotating machines are presented and discussed herein. The results are extracted from studies on transmission error measurements with optical encoders in the field of power transmissions and can be broadened to include phase differenc...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2005-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2005/205291 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832546158006763520 |
|---|---|
| author | Didier Remond Jarir Mahfoudh |
| author_facet | Didier Remond Jarir Mahfoudh |
| author_sort | Didier Remond |
| collection | DOAJ |
| description | The benefits of angular sampling when measuring various signals in rotating machines are presented and discussed herein. The results are extracted from studies on transmission error measurements with optical encoders in the field of power transmissions and can be broadened to include phase difference measurements, such as torsional vibrations, and applied to control, monitoring and measurement in rotating machines with discrete geometry. The main conclusions are primarily that the use of angular sampling enables the exact location of harmonics and, consequently, the obtaining of spectral amplitude components with precision. This is always true even if the resolution of encoders is not directly related to the studied discrete geometry. It then becomes possible to compare these harmonics under different operating conditions, especially when speed varies, without changing any parameters in spectral analysis (window length, spectral resolution, etc.). Moreover, classical techniques of improving signal to noise ratio by averaging become fully efficient in the detection of defective elements. This study has been made possible thanks to the technique of transmission error measurement with optical encoders that allows the comparison of sampling procedures, based on the same raw data. |
| format | Article |
| id | doaj-art-c093f8b0c8174311a2bec15aece1e6ee |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2005-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-c093f8b0c8174311a2bec15aece1e6ee2025-02-03T07:23:51ZengWileyShock and Vibration1070-96221875-92032005-01-0112214916110.1155/2005/205291From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete GeometryDidier Remond0Jarir Mahfoudh1Laboratoire de Dynamique des Machines et des Structures, UMR CNRS 5006, Institut National des Sciences Appliquées de Lyon, Bâtiment Jean d’Alembert, 18, rue des Sciences, 69621 VILLEURBANNE Cedex, FranceLaboratoire de Dynamique des Machines et des Structures, UMR CNRS 5006, Institut National des Sciences Appliquées de Lyon, Bâtiment Jean d’Alembert, 18, rue des Sciences, 69621 VILLEURBANNE Cedex, FranceThe benefits of angular sampling when measuring various signals in rotating machines are presented and discussed herein. The results are extracted from studies on transmission error measurements with optical encoders in the field of power transmissions and can be broadened to include phase difference measurements, such as torsional vibrations, and applied to control, monitoring and measurement in rotating machines with discrete geometry. The main conclusions are primarily that the use of angular sampling enables the exact location of harmonics and, consequently, the obtaining of spectral amplitude components with precision. This is always true even if the resolution of encoders is not directly related to the studied discrete geometry. It then becomes possible to compare these harmonics under different operating conditions, especially when speed varies, without changing any parameters in spectral analysis (window length, spectral resolution, etc.). Moreover, classical techniques of improving signal to noise ratio by averaging become fully efficient in the detection of defective elements. This study has been made possible thanks to the technique of transmission error measurement with optical encoders that allows the comparison of sampling procedures, based on the same raw data.http://dx.doi.org/10.1155/2005/205291 |
| spellingShingle | Didier Remond Jarir Mahfoudh From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry Shock and Vibration |
| title | From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry |
| title_full | From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry |
| title_fullStr | From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry |
| title_full_unstemmed | From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry |
| title_short | From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry |
| title_sort | from transmission error measurements to angular sampling in rotating machines with discrete geometry |
| url | http://dx.doi.org/10.1155/2005/205291 |
| work_keys_str_mv | AT didierremond fromtransmissionerrormeasurementstoangularsamplinginrotatingmachineswithdiscretegeometry AT jarirmahfoudh fromtransmissionerrormeasurementstoangularsamplinginrotatingmachineswithdiscretegeometry |