Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Mark J. Sirota"'
Publikováno v:
2017 IEEE Aerospace Conference.
The Thirty Meter Telescope (TMT) needs to maintain precise positioning of the optical elements to deliver unprecedented image quality. Any vibration from observatory sources must therefore be minimized; model-based analysis leads to maximum allowable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0a23861fa2b783692949e52a2a95039
https://doi.org/10.1109/aero.2017.7943747
https://doi.org/10.1109/aero.2017.7943747
Publikováno v:
IEEE Transactions on Control Systems Technology. 22:58-68
Current and planned large optical telescopes use a segmented primary mirror, with the out-of-plane degrees of freedom of each segment actively controlled. The primary mirror of the Thirty Meter Telescope (TMT) considered here is composed of 492 segme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecfcdfaaa7e0003a8588f5d61864d9b2
https://doi.org/10.1109/tcst.2013.2240456
https://doi.org/10.1109/tcst.2013.2240456
Autor:
Masaki Tabata, Masanori Iye, Takanezawa Takashi, Mark J. Sirota, Atsushi Kato, Yasushi Horiuchi, Larry Stepp, Tomonori Usuda, Noboru Kawaguchi, Satoru Sofuku, Scott Roberts, Inatani Junji, Kazuhiro Nagae, Takeharu Oshima, Junji Takaki, Noboru Itoh, Yusuke Saruta, Amir Sadjadpour, Hirano Masaki, Yutaka Ezaki, Makoto Endo, Tomoya Hattori
We present an overview of the preliminary design of the Telescope Structure System (STR) of Thirty Meter Telescope (TMT). NAOJ was given responsibility for the TMT STR in early 2012 and engaged Mitsubishi Electric Corporation (MELCO) to take over the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09f8d0c1c7a1a4633ecb1f778ca8e71a
https://resolver.caltech.edu/CaltechAUTHORS:20150615-130558332
https://resolver.caltech.edu/CaltechAUTHORS:20150615-130558332
Autor:
Douglas G. MacMynowski, Peter M. Thompson, Lewis C. Roberts, J. Chris Shelton, M. Mark Colavita, Mark J. Sirota
The Thirty Meter Telescope primary mirror is composed of 492 segments that are controlled to high precision in the presence of wind and vibration disturbances, despite the interaction with structural dynamics. The higher bandwidth and larger number o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac46b9dd78d30a101727b0952b3cb388
https://resolver.caltech.edu/CaltechAUTHORS:20120406-153858986
https://resolver.caltech.edu/CaltechAUTHORS:20120406-153858986
Autor:
Mitchell Troy, Myung Cho, Chris Shelton, Byoung-Joon Seo, Mark J. Sirota, George Z. Angeli, Norbert Sigrist, Carl Nissly
We evaluate how well the performance of the Thirty Meter Telescope (TMT) can be maintained against thermally induced errors during a night of observation. We first demonstrate that using look-up-table style correction for TMT thermal errors is unlike
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf9d9fbd7d4c7c18cdb609441a0ec0a7
https://resolver.caltech.edu/CaltechAUTHORS:20161031-083213017
https://resolver.caltech.edu/CaltechAUTHORS:20161031-083213017
Autor:
Douglas G. MacMynowski, Peter M. Thompson, Martin W. Regehr, M. Mark Colavita, Mark J. Sirota
Publikováno v:
SPIE Proceedings.
The Thirty Meter Telescope has 492 primary mirror segments, each incorporated into a Primary Segment Assembly (PSA), each of which in turn has three actuators that control piston, tip, and tilt, for a total of 1476 actuators. Each actuator has a serv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b144cf7c02c58b55ecc26532f08d31ac
https://doi.org/10.1117/12.857371
https://doi.org/10.1117/12.857371
Autor:
Peter M. Thompson, James D. Moore, M. Mark Colavita, Eric C. Williams, Mark J. Sirota, Martin W. Regehr
Publikováno v:
SPIE Proceedings.
Finite element models (FEMs) are being used extensively in the design of the Thirty Meter Telescope (TMT). One such use is in the design and analysis of the Primary Segment Assembly (PSA). Each PSA supports one primary mirror segment on the mirror ce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b1c104a0408176ea16579f09f49747d
https://doi.org/10.1117/12.858155
https://doi.org/10.1117/12.858155
Publikováno v:
SPIE Proceedings.
The primary mirror control system (M1CS) stabilizes the 492 segments of the Thirty Meter Telescope primary mirror in the presence of disturbances. Each Primary Segment Assembly (PSA) has three actuators and position sensors that control the piston, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37e14093b2b5217c8ab20225515b9987
https://doi.org/10.1117/12.790287
https://doi.org/10.1117/12.790287
Publikováno v:
SPIE Proceedings.
The TMT mount control system provides telescope pointing and tracking. Requirements include wind disturbance rejection, offsetting time and accuracy, control system robustness, and the magnitude of response at structural resonances. A finite element
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f1a58aaa214f68cf1be892a48a617c3
https://doi.org/10.1117/12.790277
https://doi.org/10.1117/12.790277
Autor:
Mitchell Troy, Daniel R. Macdonald, Byoung-Joon Seo, Chris Shelton, Terry Mast, Lewis C. Roberts, Gary Chanan, Jerry Nelson, Mark J. Sirota
Publikováno v:
SPIE Proceedings.
The out-of-plane degrees of freedom (piston, tip, and tilt) of each of the 492 segments in the Thirty Meter Telescope primary mirror will be actively controlled using three actuators per segment and two edge sensors along each intersegment gap. We ad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12e107739ad83e7b7edb13d6b7cecfb6
https://doi.org/10.1117/12.790415
https://doi.org/10.1117/12.790415