Optical gyro encoder tested on the NTT
- The prototype of an optical gyro encoder (OGE) has been successfully tested on the NTT telescope in September '93. The OGE consists of a ring laser gyro and a fiber optic gyro with their input axis parallel. The gyro outptu signals are compensated for earth rotation and misalignment and are subsequently integrated to get the angles. An adaptive digital control loop locks the fiber optic gyro toThe prototype of an optical gyro encoder (OGE) has been successfully tested on the NTT telescope in September '93. The OGE consists of a ring laser gyro and a fiber optic gyro with their input axis parallel. The gyro outptu signals are compensated for earth rotation and misalignment and are subsequently integrated to get the angles. An adaptive digital control loop locks the fiber optic gyro to the laser gyro data. Thus the combined output has the precision of the laser gyro and the low noise of the fiber optic gyro. Specifically, the bias stability is better than 2 X 10-3 deg/h, the scale factor accuracy better than 1 ppm, the random walk coefficient better than 5 X 10-4 deg/(root)h and the resolution better than 3 X 10-4 arcsec. The OGE has been mounted in the altitude and in the azimuthy axis of the telescope. The data were compared with the telescope disk encoder data. The test data show that the pointing accuracy is about 1 arcsec and the tracking accuracy 0.1 arcsec over a time of 30 seconds. This accuracy is sufficient for the very large telescope, for instance.…
Document Type: | Conference Proceeding |
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Conference Type: | Konferenzartikel |
Zitierlink: | https://opus.hs-offenburg.de/8499 | Bibliografische Angaben |
Title (English): | Optical gyro encoder tested on the NTT |
Conference: | European symposium on optics for environmental and public safety (19-23 June 1995 : Munich, Germany) |
Author: | Werner SchröderStaff MemberGND, Horst Dahlmann![]() ![]() ![]() |
Year of Publication: | 1995 |
Creating Corporation: | Society of Photo-Optical Instrumentation Engineers |
Place of publication: | Bellingham, Washington |
Publisher: | SPIE |
Page Number: | 7 |
Parent Title (English): | Proceedings of SPIE |
Editor: | Ramon P. DePaula, John W. Berthold III |
Volume: | 2510 |
ISBN: | 0819418684 |
ISSN: | 0277-786X |
DOI: | https://doi.org/10.1117/12.221705 |
Language: | English | Inhaltliche Informationen |
Institutes: | Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) |
Collections of the Offenburg University: | Bibliografie | Formale Angaben |
Open Access: | Closed |
Licence (German): | ![]() |