Computer Science – Performance
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ssmt.rept..127l&link_type=abstract
In ESA, Spacecraft Structures and Mechanical Testing p 127-132 (SEE N90-10986 02-18)
Computer Science
Performance
2
Astronomical Observatories, Control Systems Design, Interactive Control, Mirrors, Reflecting Telescopes, Active Control, Algorithms, Feedback Control, Finite Element Method, Low Density Materials, Performance Tests, Precision, Spaceborne Telescopes, Thermoelasticity, Tolerances (Mechanics)
Scientific paper
The primary mirror of a large spaceborne telescope is described. The thin deformable glassy mirror is monitored in orbit by push-pull devices fixed on the rear face of the mirror. A presentation of the mirror characteristics is made followed by the description of the active control loop. The theoretical expression of the control algorithm is outlined. The performances are evaluated using finite element modeling techniques for the correction of thermoelastic distortion as well as residual defects after polishing. The theoretical simulation studies are to be correlated with ground test results on a reduced scale demonstration model.
Duran Maria
Laviron B.
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