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Precision Attitude Control of Symmetric Spinning Bodies
Report Number: AFAL TR 71-224
Author(s): Lorell, Kenneth R.; Lange, Benjamin
Corporate Author: Stanford University Department of Aeronautics and Astronautics
Corp. Rep. Number: SUDAAR 422
Laboratory: Air Force Avionics Laboratory
Publication Date: 4/1/1971
Pages: 152
Features: + Diagram(s) + Drawing(s) + Graph(s) + Photo(s)
Contract: F33615-67-C-1245
Project: 5102
Task: 510215
AD Number: AD0730854
Photo Enhancement: Complete
Abstract Text:
Motivated by the arc-second pointing requirement of the Unsupported Gyroscope experiment and other satellite applications, this research investigates the problems associated with the precision attitude control of symmetric spinning bodies. An attitude control system is synthesized and then is studied by analog simulation. Controller performance and limitations are evaluated, using a laboratory model called the Spinning Vehicle Simulator (SVS). A technique devised at Stanford University in 1966 that simplifies the design of spinning-vehicle attitude controllers is used to select controller gains. The resulting system, simulated on an analog computer, produces excellent response characteristics and is insensitive to vehicle parameter or gain changes. The magnitude of the attitude error is shown to have zero-frequency and spin-frequency components proportional to the magnitude of body-fixed and inertially fixed moments, respectively.
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This report is avalable for download via Contrails:  (152 pages, 3.21 MB)
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This report is not available for download via NTRS
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The NTIS Order Number for this report is: AD730854
This report should be available for purchase from NTIS at 1-800-553-NTIS
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Indications of Public Availabilty:
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Doppler Aided Strapdown Inertial Flight Test Program - 1971
Report Number: AFAL TR 71-368
Author(s): Pearson, Vance H.; Cleary, Richard E.; Hargrove, Leonard O.
Corporate Author: Honneywell Inc, St. Petersburg, Florida
Laboratory: Air Force Avionic Laboratory
Publication Date: 12/1/1971
Pages: 68
Features: + Diagram(s) + Drawing(s) + Foldout(s) + Graph(s) + Photo(s) + Table(s)
Contract: F33615-71-C-1633
Project: None Given
Task: None Given
AD Number: AD0890564
Photo Enhancement: Complete
Abstract Text:
The report encompasses preparation of the Honeywell H-429 (SIGN III) Strapdown Inertial System; the design, checkout, and use of an interface unit for acquiring doppler radar and GEANS inertial navigation data; the modification of the analytical mechanization for the doppler aiding and Kalman filter techniques; the software preparation; and conduct of the test program, results and conclusions of the overall effort.
Options for obtaining report:
Via Contrails:
This report is avalable for download via Contrails: (68 pages, 22.76 MB)
Via DTIC Online:
This report is not available for download via DTIC Online
Via NASA Technical Report Server:
This report is not available for download via NTRS
Via National Technical Information Service:
The NTIS Order Number for this report is: AD890564
This report should be available for purchase from NTIS at 1-800-553-NTIS
Reference the NTIS Order Number from this record when ordering from NTIS
Be sure to verify bibilographic info when ordering
Indications of Public Availabilty:
No digitial image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement
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