Physics – Optics
Scientific paper
Jul 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988autom..24..437a&link_type=abstract
Automatica (ISSN 0005-1098), vol. 24, July 1988, p. 437-453.
Physics
Optics
Alignment, Computerized Simulation, Control Systems Design, Finite Element Method, Mirrors, Reflecting Telescopes, Bandwidth, Cassegrain Optics, Dynamic Structural Analysis, Power Spectra
Scientific paper
A dynamic analysis of the control system used to align the 36 hexagonal segments of the primary mirror of the Keck Observatory ten-meter telescope has been performed, evaluating the effect of the interaction between the segment alignment control system, the wind disturbances, and the telescope structural dynamics on the telescope's optical performance. Actual wind velocities measured at three observatory sites were employed to develop a generic model of the power spectrum of forces generated by wind loads. Data are presented on the rms mirror figure errors and limits on the bandwidth of the present control system.
Aubrun Jean-Noel
Havas T. W.
Henninger W. C.
Lorell Kenneth R.
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