"The initial installation of a rotary tilt table for an aircraft inertial navigation system test facility includes accurately aligning the rotary tilt table to local level and true north coordinates. The survey techniques presently employed are an encumbrance during installation and complicate remote deployment. The objective of this thesis is to determine if an inertial platform or platforms can practically be used to replace the role of the survey techniques in the rotary tilt table alignment. The construction, capability and operation of a rotary tilt table are reviewed. The tests necessary to test and calibrate an inertial platform are outlined, including those requiring an accurately aligned rotary tilt table. The basic principles of inertial platform self-alignment are stated so a determination of the ideal behavior of the gyrocompass and level servo loops, in the absence of error, can be later used for error models. Typical gaussian error sources, representative of practical inertial components are injected and assessed to determine the standard deviation of the steady state gyrocompass and level servo loop errors for a system. System response times are selected, such that a specific mechanization may be evaluated for specific values of steady state error. Test equipment and procedures are presented that outline validation measures to be taken to ascertain that system errors are within acceptable limits. The cumulative alignment and readout errors are evaluated to define the rotary tilt table alignment accuracy achievable with one inertial platform. The accuracy is improved by utilizing multiple inertial platforms. This rotary tilt table alignment is then compared to the test requirements outlined initially. The findings are summarized and it is concluded that it is practical to use an inertial system (platform) to perform azimuth alignment of a rotary tilt table and, that leveling is best accomplished using precision spirit levels"--Abstract, leaves ii-iii.
Carlson, Gordon E.
Noack, Thomas L.
Penico, Anthony J., 1923-2011
Electrical and Computer Engineering
M.S. in Electrical Engineering
University of Missouri--Rolla
vii, 79 pages
© 1971 Max E. Bott, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Inertial navigation systems -- Maintenance and repair -- Design
Tilt table -- Maintenance and repair
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Bott, Max E., "Shop level maintenance of inertial platforms without a surveyed site" (1971). Masters Theses. 5502.