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Proceedings Paper

Smart telescope for astronomy
Author(s): Manuele Moschetti; Marco Riva; Matteo Aliverti; Giorgio Pariani; Giuseppe Sala
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Paper Abstract

In this paper, we present the preliminary design of a smart telescope, i.e. an optomechanical device whose structure is able to monitor external loads (gravity, wind, thermal gradients, displacements caused by earthquake) and actively adapt to them in order to correct misalignments. To obtain that, the final solution will foresee the use of smart materials, or rather integrated smart structures containing sensors (such as fibre optics), and actuators (shape memory alloys or piezoelectric). Starting from the optical design, where the primary mirror is supposed to be in the class of 60cm diameter, with this work we illustrate the mechanical design philosophy. The basic idea is to conceive of a "low-performance" telescope from the stability point of view, in order to emphasize the environmental loads contributions, show that it is possible to correct them a posteriori, and generalize the results for more optimized structures (Serrurier-like). Therefore, it is shown the finite element model of a first naked version of the telescope (without smart structures), useful to know the displacements caused by predictable loads. In this first design phase, the secondary mirror re-centering is taken into account as a study case: to achieve the goal, Macro Fibre Composite piezoelectric actuators have been selected.

Paper Details

Date Published: 22 July 2016
PDF: 9 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99123H (22 July 2016); doi: 10.1117/12.2232992
Show Author Affiliations
Manuele Moschetti, INAF - Osservatorio Astronomico di Brera (Italy)
Politecnico di Milano (Italy)
Marco Riva, INAF - Osservatorio Astronomico di Brera (Italy)
Matteo Aliverti, INAF - Osservatorio Astronomico di Brera (Italy)
Politecnico di Milano (Italy)
Giorgio Pariani, INAF - Osservatorio Astronomico di Brera (Italy)
Giuseppe Sala, Politecnico di Milano (Italy)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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