Increasing Structural Performance of Space Telescope Mirrors through Simultaneous Shape and Size Optimization

Increasing Structural Performance of Space Telescope Mirrors through Simultaneous Shape and Size Optimization

In this paper, a numeric optimization approach for designing space telescope mirrors will be presented. It is fundamental to space telescopes that each element—including their mirrors—are as lightweight as possible. Moreover, the performance of space telescopes is driven by how strongly these mirror...

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Bibliographic Details
Published in:Aerospace Vol. 9; no. 11; p. 646
Main Authors: Warzecha, Marcel, Schatz, Markus E., Lucarelli, Stefano, Jüttner, Cedric
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-10-2022
Subjects:
Aircraft industry
Algorithms
Boundary conditions
Design optimization
Gravity
gravity release
Lightweight
Manufacturing
Robustness (mathematics)
size and shape design variables
Space telescopes
structural optimization
Telescope
telescope mirrors
Telescopes
Wave fronts
wavefront error
Zernike polynomials
Germany
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Summary:In this paper, a numeric optimization approach for designing space telescope mirrors will be presented. It is fundamental to space telescopes that each element—including their mirrors—are as lightweight as possible. Moreover, the performance of space telescopes is driven by how strongly these mirrors are distorted upon removal of gravitational load. These distortions result in a deterioration in the optical performance, which is also known as the wavefront error. This error can best be described via Zernike polynomials. To increase the optical performance, along with making the mirror lightweight, the overall root mean square (RMS) of the deformation is used as the optimization objective. An approach utilizing size and shape variables is used to define the feasible design space for the optimization. Lastly, general findings will be discussed, as well as numerical advantages of deploying structural optimization (e.g., robustness evaluation).
ISSN:2226-4310
2226-4310
DOI:10.3390/aerospace9110646