Mr. Austin Roberts Profile

Austin Roberts

at Vera C. Rubin Observatory

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Author

Publications (5)

Proceedings Article | 11 September 2024 Presentation + Paper

The Vera C. Rubin's M2 support system integration and verification at the TMA

Gabriele Rodeghiero, Luca Rosignoli, Rodolfo Canestrari, Enrico Giro, Pablo Zorzi, Te-Wei Tsai, Holger Drass, Yijung Kang, Roberto Tighe, Doug Neil, Franco Colleoni, Felipe Daruich, Mostafa Lutfi, Guillem Megias Homar, Bruno Quint, Tiago Ribeiro, Austin Roberts, Jacques Sebag, Brian Stalder, Kevin Siruno, Malhar Sonaniskar, Kevin Fanning, Peter Ferguson, Petr Kubánek, Sandrine Thomas, Chuck Claver, Andy Clemens, Kevin Reil, Freddy Muñoz Arancibia, John Andrew, Ian Ordenez Jimenez, Robinson Godoy, Mario Rivera, HyeYun Park, David Sanmartim, Paulina Venegas, Karla Aubel, Alysha Shugart, Massimo Brescia, David Cabrera, David Jimenez, Carlos Morales, Angelo Fausti, Chuck Gessner, Russel Owen

Proceedings Volume 13094, 130942D (2024) https://doi.org/10.1117/12.3019210

KEYWORDS: Actuators, Mirrors, Telescopes, Glasses, Safety, Observatories, Control systems, Baffles, Cameras, Interfaces

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The M2 secondary mirror of the Vera C. Rubin Observatory, scheduled to be commissioned on-sky in 2024, will be the first active secondary mirror of 3.5m diameter in operation. Its substantial dimensions and advanced functionalities place it in league with the secondary mirrors of the upcoming 30m class telescopes. Characterizing its performance serves as a critical step towards comprehending and controlling the optics of the next generation of Extremely Large Telescopes (ELTs). This study focuses on testing and validating the M2 cell in the Observatory’s integration hall and at the Telescope Mount Assembly (TMA). We also report on the integration steps of the M2 cell onto the TMA itself, including installing the light baffle. During the testing campaign, the M2 cell is equipped with an aluminum mirror surrogate for safety reasons regarding the glass mirror. To ensure integrity when the thin glass mirror (10cm) is installed onto the telescope, the M2 support system must be actively controlled during any M2 cell movement. This prompted the development of a dedicated control system to enable closed loop mode for transporting the M2 cell with the glass mirror from the integration hall to the telescope. The tests in the integration hall were conducted with the M2 cell mounted on a rotating cart, allowing different orientations with respect to gravity as it will experience on the telescope. Upon reaching the telescope, static and dynamic tests are conducted at progressively higher telescope performance, increasing slewing speed, acceleration, and jerk. A significant novelty introduced by Rubin to astronomical instrumentation is the Verification & Validation architecture as part of the model-based Systems Engineering approach where requirements, test procedures and executions are merged into an interlaced and dynamic flow. This report presents the experimental results from the distinct test campaigns covering a wide range of M2 cell functionalities. These include characterization of actuator behavior in terms of maximum stroke and force limits, evaluation of closed-loop (active) and open-loop (passive) support system operation for the M2, system settling time and Force Balance response to different slewing speeds of the telescope.

Proceedings Article | 29 August 2022 Presentation

Overview and status of Vera C Rubin Observatory system integration, test and commissioning

Charles Claver, Sandrine Thomas, Kevin Reil, Keith Bechtol, Holger Drass, Leanne Guy, Patrick Ingraham, Robert Lupton, Austin Roberts, Brian Stalder

Proceedings Volume 12187, 121870G (2022) https://doi.org/10.1117/12.2630643

KEYWORDS: Observatories, System integration, Imaging systems, Data processing, Data acquisition, Control systems, Cameras, Telescopes, Image processing, Software development

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Proceedings Article | 13 December 2020 Presentation + Paper

Vera C. Rubin Observatory system integration, test, and commissioning: strategy and status

Jacques Sebag, Charles Claver, Sandrine Thomas, Kevin Reil, Jeffrey Barr, Keith Bechtol, Felipe Daruich, Juan Fabrega, Leanne Guy, Patrick Ingraham, Victor Krabbendam, Margaux Lopez, Freddy Munoz, Doug Neill, Wil O'Mullane, Michael Reuter, Austin Roberts, Tiago Ribeiro, Eduardo Serrano, Cristian Silva, Brian Stalder, Roberto Tighe, Bo Xin

Proceedings Volume 11445, 114451U (2020) https://doi.org/10.1117/12.2561675

KEYWORDS: Large Synoptic Survey Telescope, System integration, Cameras, Optical alignment, Telescopes, Coating, Wavefront sensors, Domes, Optical fabrication, Optical tracking

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Proceedings Article | 13 December 2020 Presentation + Paper

Documentation automation for the verification and validation of Rubin Observatory software

Gabriele Comoretto, Leanne Guy, William O'Mullane, Keith Bechtol, Jeffrey Carlin, Jonathan Sick, Brian Van Klaveren, Austin Roberts

Proceedings Volume 11450, 114500E (2020) https://doi.org/10.1117/12.2561604

KEYWORDS: Large Synoptic Survey Telescope, Software development, Systems engineering, Image processing, Information fusion

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Proceedings Article | 10 July 2018 Presentation + Paper

V&V planning and execution in an integrated model-based engineering environment using MagicDraw, Syndeia, and Jira

Brian Selvy, Austin Roberts, Michael Reuter, Charles (Chuck) Claver, Gabriele Comoretto, Tim Jenness, Wil O'Mullane, Andrew Serio, Rob Bovill, Jacques Sebag, Sandrine Thomas, Manas Bajaj, Dirk Zwemer, Brian Van Klaveren

Proceedings Volume 10705, 107050U (2018) https://doi.org/10.1117/12.2310125

KEYWORDS: Systems modeling, Large Synoptic Survey Telescope, Data modeling, Systems engineering, Integrated modeling, Model-based design, Safety, Telescopes

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