Dr. Douglas G. MacMartin Profile

Dr. Douglas G. MacMartin

at Cornell Univ

SPIE Involvement:

Author

Publications (34)

Proceedings Article | 23 August 2024 Poster + Paper

The TMT International Observatory aerothermal performance estimation procedure

Konstantinos Vogiatzis, Doug MacMartin, Lianqi Wang, Gelys Trancho

Proceedings Volume 13099, 130992K (2024) https://doi.org/10.1117/12.3020241

KEYWORDS: Telescopes, Observatories, Thermal modeling, Computational fluid dynamics, Performance modeling, Image quality

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Proceedings Article | 25 August 2022 Presentation + Paper

TMT systems engineering evolution in the last decade

Gelys Trancho, George Angeli, Josh Church, Jamie Dodge, Bart Fordham, Sarah Gajadhar, Nancy Han, Kayla Hardie, Doug McMartin, John Miles, Scott Roberts, John Rogers, Fernando Santoro, Hugh Thompson, Konstantinos Vogiatzis

Proceedings Volume 12187, 121870L (2022) https://doi.org/10.1117/12.2631603

KEYWORDS: Systems engineering, Interfaces, Computer aided design, Observatories, Systems modeling, Standards development, Safety, Reliability, Databases, Control systems

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SPIE Journal Paper | 6 June 2022

Management of equipment vibration for extremely large telescopes

David Adams, Bartholomew Fordham, Gerd Jakob, Douglas MacMartin, Babak Sedghi, David Schwartz, Hugh Thompson, Tony Travouillon, Byron Smith, Peter Kerrian

JATIS, Vol. 8, Issue 02, 021512, (June 2022) https://doi.org/10.1117/12.10.1117/1.JATIS.8.2.021512

KEYWORDS: Telescopes, Fluctuations and noise, Adaptive optics, Large telescopes, Mirrors, Observatories, Wavefronts, Optical isolators, Cryocoolers, Actuators

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SPIE Journal Paper | 16 September 2015

Vibration budget for observatory equipment

Douglas MacMartin, Hugh Thompson

JATIS, Vol. 1, Issue 03, 034005, (September 2015) https://doi.org/10.1117/12.10.1117/1.JATIS.1.3.034005

KEYWORDS: Observatories, Telescopes, Adaptive optics, Image segmentation, Actuators, Mirrors, Electronics, Buildings, Motion models, Thirty Meter Telescope

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Proceedings Article | 4 August 2014 Paper

Unsteady wind loads for TMT: replacing parametric models with CFD

Douglas MacMartin, Konstantinos Vogiatzis

Proceedings Volume 9150, 91500Q (2014) https://doi.org/10.1117/12.2057295

KEYWORDS: Telescopes, Turbulence, Mirrors, Image segmentation, Motion models, Device simulation, Actuators, Systems modeling, Servomechanisms, Thirty Meter Telescope

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Unsteady wind loads due to turbulence inside the telescope enclosure result in image jitter and higher-order image degradation due to M1 segment motion. Advances in computational fluid dynamics (CFD) allow unsteady simulations of the flow around realistic telescope geometry, in order to compute the unsteady forces due to wind turbulence. These simulations can then be used to understand the characteristics of the wind loads. Previous estimates used a parametric model based on a number of assumptions about the wind characteristics, such as a von Karman spectrum and frozen-flow turbulence across M1, and relied on CFD only to estimate parameters such as mean wind speed and turbulent kinetic energy. Using the CFD-computed forces avoids the need for assumptions regarding the flow. We discuss here both the loads on the telescope that lead to image jitter, and the spatially-varying force distribution across the primary mirror, using simulations with the Thirty Meter Telescope (TMT) geometry. The amplitude, temporal spectrum, and spatial distribution of wind disturbances are all estimated; these are then used to compute the resulting image motion and degradation. There are several key differences relative to our earlier parametric model. First, the TMT enclosure provides sufficient wind reduction at the top end (near M2) to render the larger cross-sectional structural areas further inside the enclosure (including M1) significant in determining the overall image jitter. Second, the temporal spectrum is not von Karman as the turbulence is not fully developed; this applies both in predicting image jitter and M1 segment motion. And third, for loads on M1, the spatial characteristics are not consistent with propagating a frozen-flow turbulence screen across the mirror: Frozen flow would result in a relationship between temporal frequency content and spatial frequency content that does not hold in the CFD predictions. Incorporating the new estimates of wind load characteristics into TMT response predictions leads to revised estimates of the response of TMT to wind turbulence, and validates the aerodynamic design of the enclosure.

Proceedings Article | 4 August 2014 Paper

Systems engineering of the Thirty Meter Telescope for the construction phase

Scott Roberts, John Rogers, Hugh Thompson, Konstantinos Vogiatzis, Douglas MacMartin, Eric Wilde, Mitchell Troy, Byoung-Joon Seo, Carl Nissly

Proceedings Volume 9150, 91500V (2014) https://doi.org/10.1117/12.2056870

KEYWORDS: Systems engineering, Observatories, Computer aided design, Control systems, Data modeling, Systems modeling, Performance modeling, Databases, Interfaces, Thirty Meter Telescope

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Proceedings Article | 4 August 2014 Paper

Real time wavefront control system for the Large Synoptic Survey Telescope (LSST)

George Angeli, Bo Xin, Charles Claver, Douglas MacMartin, Douglas Neill, Matthew Britton, Jacques Sebag, Srinivasan Chandrasekharan

Proceedings Volume 9150, 91500H (2014) https://doi.org/10.1117/12.2055390

KEYWORDS: Large Synoptic Survey Telescope, Wavefronts, Telescopes, Wavefront sensors, Cameras, Image quality, Control systems, Actuators, Atmospheric modeling, Mirrors

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Proceedings Article | 22 July 2014 Paper

Measuring transmission and forces from observatory equipment vibration

Hugh Thompson, Doug MacMartin, Peter W. Byrnes, Daigo Tomono, Hiroshi Terada

Proceedings Volume 9145, 91454G (2014) https://doi.org/10.1117/12.2057206

KEYWORDS: Telescopes, Optical isolators, Observatories, Signal to noise ratio, Motion measurement, Astronomy, Motion estimation, Soil science, Optical instrument design, Thirty Meter Telescope

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Proceedings Article | 22 July 2014 Paper

Equipment vibration budget for the TMT

Douglas MacMartin, Hugh Thompson

Proceedings Volume 9145, 91452O (2014) https://doi.org/10.1117/12.2057179

KEYWORDS: Telescopes, Adaptive optics, Image segmentation, Observatories, Motion models, Wavefronts, Electronics, Buildings, Finite element methods, Actuators

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Proceedings Article | 13 September 2012 Paper

Distributed control of large deformable mirrors

Douglas MacMartin, Rikard Heimsten, Torben Andersen, Mette Owner-Petersen

Proceedings Volume 8447, 844710 (2012) https://doi.org/10.1117/12.926940

KEYWORDS: Actuators, Sensors, Deformable mirrors, Mirrors, Adaptive optics, Spatial frequencies, Acousto-optics, Control systems, Feedback loops, Wavefronts

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SPIE Journal Paper | 7 March 2012

Suppressing low-order eigenmodes with local control for deformable mirrors

Rikard Heimsten, Mette Owner-Petersen, Torben Andersen, Thomas Ruppel, Douglas MacMynowski

OE, Vol. 51, Issue 02, 026601, (March 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.2.026601

KEYWORDS: Actuators, Mirrors, Deformable mirrors, Control systems, Finite element methods, Sensors, Optical engineering, Adaptive optics, Telescopes, Observatories

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Proceedings Article | 10 November 2011 Paper

Integrated modeling of a laboratory setup for a large deformable mirror

Rikard Heimsten, Torben Andersen, Mette Owner-Petersen, Douglas MacMynowski

Proceedings Volume 8336, 83360N (2011) https://doi.org/10.1117/12.915571

KEYWORDS: Actuators, Deformable mirrors, Sensors, Adaptive optics, Telescopes, Feedback loops, Control systems, Integrated modeling, Mirrors, Wavefront sensors

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Proceedings Article | 10 November 2011 Paper

Control system modeling for the Thirty Meter Telescope primary mirror

Douglas MacMynowski, Peter Thompson, J. Shelton, Lewis Roberts, M. Colavita, Mark Sirota

Proceedings Volume 8336, 83360R (2011) https://doi.org/10.1117/12.914941

KEYWORDS: Sensors, Actuators, Telescopes, Mirrors, Performance modeling, Finite element methods, Servomechanisms, Motion models, Control systems, Thirty Meter Telescope

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Proceedings Article | 10 November 2011 Paper

Integrated modeling and systems engineering for the Thirty Meter Telescope

George Angeli, Konstantinos Vogiatzis, Doug MacMynowski, Byoung-Joon Seo, Carl Nissly, Mitchell Troy, Myung Cho

Proceedings Volume 8336, 833605 (2011) https://doi.org/10.1117/12.919363

KEYWORDS: Telescopes, Systems modeling, Observatories, Performance modeling, Systems engineering, Stochastic processes, Adaptive optics, Mathematical modeling, Integrated modeling, Thirty Meter Telescope

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Proceedings Article | 9 August 2010 Paper

Primary mirror dynamic disturbance models for TMT: vibration and wind

Douglas MacMynowski, M. Mark Colavita, Warren Skidmore, Konstantinos Vogiatzis

Proceedings Volume 7738, 77380E (2010) https://doi.org/10.1117/12.857395

KEYWORDS: Actuators, Mirrors, Turbulence, Servomechanisms, Adaptive optics, Telescopes, Data modeling, Systems modeling, Wind energy, Control systems design

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Proceedings Article | 6 August 2010 Paper

Robustness of Thirty Meter Telescope primary mirror control

Douglas MacMynowski, Peter Thompson, Chris Shelton, Lewis Roberts

Proceedings Volume 7733, 77332J (2010) https://doi.org/10.1117/12.857380

KEYWORDS: Sensors, Actuators, Mirrors, Error analysis, Servomechanisms, Telescopes, Control systems, Structural dynamics, Tolerancing, Thirty Meter Telescope

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Proceedings Article | 5 August 2010 Paper

Servo design and analysis for the Thirty Meter Telescope primary mirror actuators

Peter Thompson, Douglas MacMynowski, Martin Regehr, M. Mark Colavita, Mark Sirota

Proceedings Volume 7733, 77332F (2010) https://doi.org/10.1117/12.857371

KEYWORDS: Actuators, Mirrors, Ferroelectric materials, Servomechanisms, Telescopes, Control systems, Sensors, Image segmentation, Resistors, Thirty Meter Telescope

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Proceedings Article | 29 July 2010 Paper

Progress in developing a low-cost deformable mirror

Rikard Heimsten, Douglas MacMynowski, Torben Andersen

Proceedings Volume 7736, 77365N (2010) https://doi.org/10.1117/12.855054

KEYWORDS: Actuators, Sensors, Mirrors, Feedback loops, Deformable mirrors, Control systems, Adaptive optics, Mathematical modeling, Acoustics, Linear filtering

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Proceedings Article | 1 October 2009 Paper

Investigation of primary mirror segment's residual errors for the Thirty Meter Telescope

Byoung-Joon Seo, Carl Nissly, George Angeli, Doug MacMynowski, Norbert Sigrist, Mitchell Troy, Eric Williams

Proceedings Volume 7427, 74270F (2009) https://doi.org/10.1117/12.828046

KEYWORDS: Actuators, Wavefronts, Mirrors, Wavefront sensors, Telescopes, Image segmentation, Systems modeling, Sensors, Surface finishing, Thirty Meter Telescope

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Proceedings Article | 11 July 2008 Paper

Finite element analysis of TMT vibrations transmitted through Telescope-Enclosure-Soil Interaction

Genady Shagal, Doug MacMynowski, Konstantinos Vogiatzis

Proceedings Volume 7017, 70171Y (2008) https://doi.org/10.1117/12.792288

KEYWORDS: Telescopes, 3D modeling, Finite element methods, Systems modeling, Buildings, Fluctuations and noise, Motion models, Astronomical telescopes, Astronomy, Thirty Meter Telescope

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Proceedings Article | 10 July 2008 Paper

Analysis of the TMT mount control system

Peter Thompson, Douglas MacMynowski, Mark Sirota

Proceedings Volume 7012, 70121P (2008) https://doi.org/10.1117/12.790277

KEYWORDS: Telescopes, Computer programming, Sensors, Control systems, Performance modeling, Phase modulation, Finite element methods, Electroluminescence, Astatine, Wavefront sensors

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Proceedings Article | 10 July 2008 Paper

TMT telescope structure system: design and development progress report

Kei Szeto, Scott Roberts, Mike Gedig, Glenn Austin, Christie Lagally, Steven Patrick, Dominic Tsang, Doug MacMynowski, Mark Sirota, Larry Stepp, Peter Thompson

Proceedings Volume 7012, 70122G (2008) https://doi.org/10.1117/12.787002

KEYWORDS: Telescopes, Optical instrument design, Control systems, Structural design, Safety, Control systems design, Finite element methods, Space telescopes, Earthquakes, Thirty Meter Telescope

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Proceedings Article | 10 July 2008 Paper

Control analysis of the TMT primary segment assembly

Peter Thompson, Douglas MacMynowski, Mark Sirota

Proceedings Volume 7012, 70121N (2008) https://doi.org/10.1117/12.790287

KEYWORDS: Mirrors, Actuators, Control systems, Finite element methods, Sensors, Telescopes, Control systems design, Phase modulation, Mirror structures, Thirty Meter Telescope

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Proceedings Article | 9 July 2008 Paper

Dynamic analysis of TMT

Douglas MacMynowski, Carl Blaurock, George Angeli

Proceedings Volume 7017, 70170W (2008) https://doi.org/10.1117/12.786935

KEYWORDS: Telescopes, Turbulence, Systems modeling, Image segmentation, Acoustics, Control systems, Mirrors, Adaptive optics, Integrated modeling, Thirty Meter Telescope

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Proceedings Article | 9 July 2008 Paper

Analysis of TMT primary mirror control-structure interaction

Douglas MacMynowski, Peter Thompson, Mark Sirota

Proceedings Volume 7017, 701715 (2008) https://doi.org/10.1117/12.787003

KEYWORDS: Actuators, Servomechanisms, Mirrors, Telescopes, Control systems, Sensors, Structural dynamics, Feedback control, Optical instrument design, Thirty Meter Telescope

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Proceedings Article | 22 June 2006 Paper

Modeling wind-buffeting of the Thirty Meter Telescope

Douglas MacMynowski, Carl Blaurock, George Angeli, Konstantinos Vogiatzis

Proceedings Volume 6271, 62710M (2006) https://doi.org/10.1117/12.672706

KEYWORDS: Telescopes, Mirrors, Turbulence, Performance modeling, Systems modeling, Optical instrument design, Motion models, Image segmentation, Finite element methods, Thirty Meter Telescope

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Proceedings Article | 29 September 2004 Paper

Wind tunnel testing of a generic telescope enclosure

Tait Pottebaum, Douglas MacMynowski

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.550798

KEYWORDS: Telescopes, Visualization, Cameras, Data modeling, Optical instrument design, Mirrors, Particles, Wind measurement, Turbulence, Particle image velocimetry

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Proceedings Article | 16 September 2004 Paper

Modeling tools to estimate the performance of the Thirty Meter Telescope: an integrated approach

George Angeli, Jennifer Dunn, Scott Roberts, Douglas MacMynowski, Anna Segurson, Konstantinos Vogiatzis, Joeleff Fitzsimmons

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552523

KEYWORDS: Telescopes, Mirrors, Integrated modeling, Device simulation, Sensors, Integrated optics, Actuators, Optical instrument design, Astronomy, Thirty Meter Telescope

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Proceedings Article | 16 September 2004 Paper

Parametric modeling and control of telescope wind-induced vibration

Douglas MacMynowski, George Angeli, Konstantinos Vogiatzis, Joeleff Fitzsimmons, Stephen Padin

Proceedings Volume 5497, (2004) https://doi.org/10.1117/12.552282

KEYWORDS: Mirrors, Telescopes, Turbulence, Space telescopes, Optical instrument design, Systems modeling, Performance modeling, Secondary tip-tilt mirrors, Wind measurement, Control systems

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Proceedings Article | 14 August 2003 Paper

Control challenges for extremely large telescopes

Douglas MacMartin

Proceedings Volume 5054, (2003) https://doi.org/10.1117/12.484661

KEYWORDS: Mirrors, Actuators, Telescopes, Adaptive optics, Control systems, Optical instrument design, Sensors, Large telescopes, Turbulence, Wavefronts

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Proceedings Article | 7 February 2003 Paper

Sparse-matrix wavefront reconstruction: simulations and experiments

Fang Shi, Douglas MacMartin, Mitchell Troy, Gary Brack, Rick Burruss, Richard Dekany

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.457134

KEYWORDS: Matrices, Actuators, Wavefronts, Adaptive optics, Wavefront reconstruction, Spatial frequencies, Wavefront sensors, Sensors, Device simulation, Telescopes

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Proceedings Article | 30 January 2003 Paper

Control of the California Extremely Large Telescope primary mirror

Douglas MacMartin, Gary Chanan

Proceedings Volume 4840, (2003) https://doi.org/10.1117/12.458150

KEYWORDS: Sensors, Mirrors, Wavefronts, Error analysis, Control systems, Actuators, Telescopes, Adaptive optics, Large telescopes, Capacitors

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Proceedings Article | 18 December 2002 Paper

Advanced Segmented Silicon Space Telescope (ASSiST)

Richard Dekany, Douglas MacMartin, Gary Chanan, Mitchell Troy

Proceedings Volume 4849, (2002) https://doi.org/10.1117/12.460563

KEYWORDS: Mirrors, Silicon, Space telescopes, Actuators, Microelectromechanical systems, Telescopes, Semiconducting wafers, Wafer-level optics, Silicon carbide, Stars

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Proceedings Article | 8 September 1993 Paper

MIT Middeck Active Control Experiment (MACE): noncollocated payload pointing control

Douglas MacMartin, David Miller

Proceedings Volume 1917, (1993) https://doi.org/10.1117/12.152788

KEYWORDS: Detection and tracking algorithms, Systems modeling, Performance modeling, Intelligence systems, Data modeling, Control systems, Servomechanisms, Actuators, Sensors, Gyroscopes

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Showing 5 of 34 publications

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