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The modeling and design of the Annular Suspension and Pointing System /ASPS/The Annular Suspension and Pointing System (ASPS) is a payload auxiliary pointing device of the Space Shuttle. The ASPS is comprised of two major subassemblies, a vernier and a coarse pointing subsystem. The three functions provided by the ASPS are related to the pointing of the payload, centering the payload in the magnetic actuator assembly, and tracking the payload mounting plate and shuttle motions by the coarse gimbals. The equations of motion of a simplified planar model of the ASPS are derived. Attention is given to a state diagram of the dynamics of the ASPS with position-plus-rate controller, the nonlinear spring characteristic for the wire-cable torque of the ASPS, the design of the analog ASPS through decoupling and pole placement, and the time response of different components of the continuous control system.
Document ID
19790035696
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kuo, B. C.
(Illinois Univ. Urbana, IL, United States)
Lin, W. C. W.
(Illinois, University Urbana, Ill., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
AIAA PAPER 79-0398
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting
Location: New Orleans, LA
Start Date: January 15, 1979
End Date: January 17, 1979
Sponsors: American Institute of Aeronautics, Astronautics
Accession Number
79A19709
Funding Number(s)
CONTRACT_GRANT: NAS8-32358
Distribution Limits
Public
Copyright
Other

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