Mathematics – Logic
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975sshm.meetq....f&link_type=abstract
AAS, AIAA, IEEE, ORSA, and IMS, Meeting on Space Shuttle Missions of the 80's, Denver, Colo., Aug. 26-28, 1975, AAS 15 p.
Mathematics
Logic
Hubble Space Telescope, Optical Correction Procedure, Pointing Control Systems, Error Correcting Devices, Focal Plane Devices, Logic Design, Matrices (Mathematics), Mirrors, Optimal Control, Perturbation Theory, Polynomials
Scientific paper
The LST will require the ability to realign the optical elements of the system on-orbit in an absolute manner. This study was undertaken with the objective of determining the control logic required for secondary mirror position control on a Ritchey-Chretien stellar telescope, utilizing measurements of the wavefront propagating through the telescope made by interferometers located at the prime focal plane. Control equations are presented which will allow control of the secondary mirror in five degrees of freedom, from information gained at a single off-axis field location for the case of a telescope with a known high quality primary mirror. For the case where the primary is of unknown or doubtful quality, measurements at more than one field location are necessary and the secondary control equations for this case are also developed.
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