Active-passive correction of wind buffeting deformation on large thin meniscus mirrors

Javier Castro; Brian Mack; Antonio Cruz-Lopez; Juan Paris P. Gonzalez; Carlos Martin-Diaz; German R. Pescador; Luis Fernando Rodriguez-Ramos; Vicente Sanchez de la Rosa; Nicolas A. Sosa; Mark R. Williams

doi:10.1117/12.176175

1 June 1994 Active-passive correction of wind buffeting deformation on large thin meniscus mirrors

Javier Castro, Brian Mack, Antonio Cruz-Lopez, Juan Paris P. Gonzalez, Carlos Martin-Diaz, German R. Pescador, Luis Fernando Rodriguez-Ramos, Vicente Sanchez de la Rosa, Nicolas A. Sosa, Mark R. Williams

Author Affiliations +

Proceedings Volume 2199, Advanced Technology Optical Telescopes V; (1994) https://doi.org/10.1117/12.176175
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

This paper presents a solution to correct wind induced deformation on a 8.0 m thin meniscus mirror supported by a system of astatic active supports. The correction scheme is based on an active correction using the force actuators which support the mirror, and a passive rate dependent coupling of the mirror to the cell. The paper identifies the fundamental design parameters of the passive correction system and the active controller, and shows its wind attenuation capabilities. A 3D simulation verifies the good performance of the system for wind velocities of about 45 km/h. Furthermore, the influence of cell deflection on the mirror due to the passive coupling system is shown.

Citation Download Citation

Javier Castro, Brian Mack, Antonio Cruz-Lopez, Juan Paris P. Gonzalez, Carlos Martin-Diaz, German R. Pescador, Luis Fernando Rodriguez-Ramos, Vicente Sanchez de la Rosa, Nicolas A. Sosa, and Mark R. Williams "Active-passive correction of wind buffeting deformation on large thin meniscus mirrors", Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); https://doi.org/10.1117/12.176175

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