Persistent Link:
http://hdl.handle.net/10150/581627
Title:
Servo Controls for Low S/N Satellite Auto-Tracking
Author:
Busch, Chuck E.
Affiliation:
ViaSat Inc.
Issue Date:
2012-10
Rights:
Copyright © held by the author; distribution rights International Foundation for Telemetering
Collection Information:
Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
Publisher:
International Foundation for Telemetering
Journal:
International Telemetering Conference Proceedings
Abstract:
At very low Signal to Noise receive ratios, a typical Autotrack servo loop exhibits significant servo noise tracking jitter that can degrade the received signal characteristics. The angular jitter can be minimized by a lowering of the autotracking servo loop bandwidth, but at the sacrifice of the servos ability to reject external torque disturbances, such as wind deflections. As satellite downlinks continue to move to higher frequencies, the angular errors caused by either the tracking noise or the wind deflections of a receive antenna will have increasingly negative effect on the quality of the received data. This paper examines the performance of a servo algorithm that maintains the needed wide bandwidth characteristics of wind deflection rejection while achieving the noise smoothing characteristics of a very low bandwidth Autotrack servo response. The control algorithms have been tested on a 13 meter Remote Sensing Satellite tracking system to determine the overall tracking performance of the new implementation. Current results indicate that the new servo configuration achieves the desired results typical of a wide bandwidth system of high wind rejection and low target dynamics tracking errors. At the same time, it provides elimination of slowly changing errors from axis miss-alignments, thermal effects, and gravitational effects and the low RF noise jitter performance typical of a low bandwidth system.
Sponsors:
International Foundation for Telemetering
ISSN:
0884-5123; 0074-9079
Additional Links:
http://www.telemetry.org/

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleServo Controls for Low S/N Satellite Auto-Trackingen_US
dc.contributor.authorBusch, Chuck E.en
dc.contributor.departmentViaSat Inc.en
dc.date.issued2012-10en
dc.rightsCopyright © held by the author; distribution rights International Foundation for Telemeteringen_US
dc.description.collectioninformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.en_US
dc.publisherInternational Foundation for Telemeteringen
dc.description.abstractAt very low Signal to Noise receive ratios, a typical Autotrack servo loop exhibits significant servo noise tracking jitter that can degrade the received signal characteristics. The angular jitter can be minimized by a lowering of the autotracking servo loop bandwidth, but at the sacrifice of the servos ability to reject external torque disturbances, such as wind deflections. As satellite downlinks continue to move to higher frequencies, the angular errors caused by either the tracking noise or the wind deflections of a receive antenna will have increasingly negative effect on the quality of the received data. This paper examines the performance of a servo algorithm that maintains the needed wide bandwidth characteristics of wind deflection rejection while achieving the noise smoothing characteristics of a very low bandwidth Autotrack servo response. The control algorithms have been tested on a 13 meter Remote Sensing Satellite tracking system to determine the overall tracking performance of the new implementation. Current results indicate that the new servo configuration achieves the desired results typical of a wide bandwidth system of high wind rejection and low target dynamics tracking errors. At the same time, it provides elimination of slowly changing errors from axis miss-alignments, thermal effects, and gravitational effects and the low RF noise jitter performance typical of a low bandwidth system.en
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.identifier.issn0884-5123en
dc.identifier.issn0074-9079en
dc.identifier.urihttp://hdl.handle.net/10150/581627en
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.typetexten
dc.typeProceedingsen
dc.relation.urlhttp://www.telemetry.org/en
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.