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Proceedings Paper

Implementation of an incremental optical encoder for submicroradian measurement of gimbal pointing angles
Author(s): Ralph R. Galetti; Steven Baugh; Damien M. Gonzales; Edward J. Herman; Matthew D. Nixon
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Paper Abstract

The implementation of an incremental optical encoder for measurement of gimbal pointing angles is discussed. The application described is typical of many programs being conducted at SVS Systems, Inc. Performance requirements such as resolution, accuracy, bandwidth, size, and weight are described and the advantages of using the optical encoder instead of more 'traditional' technologies are given. The resolution of the optical encoders is on the order of 20 nanoradians. Disadvantages to using the optical incremental encoders are discussed as implementation challenges. An overview of how these challenges were overcome is described. A control system implementation using the encoders for gimbal stabilization is presented, including simulations result. The combination of resolution, repeatability, and accuracy of the encoders opens new possibilities for gimbal stabilization without rate sensors attached to the pointing mirror, as shown through simulation. Test results verifying the proper operation of the encoder are presented.

Paper Details

Date Published: 3 August 1999
PDF: 14 pages
Proc. SPIE 3706, Airborne Laser Advanced Technology II, (3 August 1999); doi: 10.1117/12.356967
Show Author Affiliations
Ralph R. Galetti, SVS Systems, Inc. (United States)
Steven Baugh, SVS Systems, Inc. (United States)
Damien M. Gonzales, SVS Systems, Inc. (United States)
Edward J. Herman, SVS Systems, Inc. (United States)
Matthew D. Nixon, SVS Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 3706:
Airborne Laser Advanced Technology II
Todd D. Steiner; Paul H. Merritt, Editor(s)

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