Zobrazeno 1 - 10
of 21
pro vyhledávání: '"John M. Rakoczy"'
Autor:
John M. Rakoczy, Pedro A. Capo-Lugo
Publikováno v:
Acta Astronautica. 162:227-242
This paper presents a new fuzzy logic system that decouples the measured Earth's magnetic field problem from the control analysis. The fuzzy logic takes care of the coupling between the magnetic field lines so that a classical controller is used to d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5df6b7fcc4e7426a2a9e52fe7de77f7d
https://doi.org/10.1016/j.actaastro.2019.06.014
https://doi.org/10.1016/j.actaastro.2019.06.014
Publikováno v:
2021 IEEE Aerospace Conference (50100).
There are significant research challenges for design of a reliable mechanism of operation in autonomous multi-agent systems (MAS). This demands several fundamental advances in distributed localization, guidance, navigation, and state estimation. Cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f4a560d265a1eb3a971b9a303bd8694
https://doi.org/10.1109/aero50100.2021.9438414
https://doi.org/10.1109/aero50100.2021.9438414
Publikováno v:
Sensors (Basel, Switzerland)
Sensors, Vol 20, Iss 5299, p 5299 (2020)
Sensors, Vol 20, Iss 5299, p 5299 (2020)
The Smartphone Video Guidance Sensor (SVGS) is a vision-based sensor that computes the six-state position and orientation vector of a target relative to a coordinate system attached to a smartphone. This paper presents accuracy-characterization measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66567ff72a6a1089af98e7aeecba7d16
http://europepmc.org/articles/PMC7571250
http://europepmc.org/articles/PMC7571250
Publikováno v:
Robotics
Volume 9
Issue 3
Robotics, Vol 9, Iss 70, p 70 (2020)
Volume 9
Issue 3
Robotics, Vol 9, Iss 70, p 70 (2020)
This paper presents the first demonstration of NASA&rsquo
s Smartphone Video Guidance Sensor (SVGS) as real-time position and attitude estimator for proximity and formation maneuvers. An optimal linear quadratic Gaussian controller was used, com
s Smartphone Video Guidance Sensor (SVGS) as real-time position and attitude estimator for proximity and formation maneuvers. An optimal linear quadratic Gaussian controller was used, com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b86c8109760fbca59ad0d1e8341538f2
https://doi.org/10.3390/robotics9030070
https://doi.org/10.3390/robotics9030070
Publikováno v:
Publications of the Astronomical Society of the Pacific. 118:319-323
A real-valued genetic algorithm with random rank-based selection is shown to successfully estimate the multiple phases of a segmented optical system modeled on the seven-mirror Systematic Image-Based Optical Alignment test bed located at NASA's Marsh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::daccb84c011a6056740676fa156d0e97
https://doi.org/10.1086/498827
https://doi.org/10.1086/498827
Autor:
John M. Rakoczy, Kenneth A. Herren
Publikováno v:
SPIE Proceedings.
A technique for 6-degree-of-freedom (6DOF) pose estimation of space vehicles is being developed. This technique draws upon recent developments in implementing optical correlation measurements in a nonlinear estimator, which relates the optical correl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::244e36f4bfc73868f8abd220c1089c1f
https://doi.org/10.1117/12.775200
https://doi.org/10.1117/12.775200
Autor:
Joe Carroll, Richard S. Pappa, Jonathan J. Miles, Joseph R. Blandino, Aaron R. Gough, John M. Rakoczy, Christopher H. Jenkins
Publikováno v:
45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference.
Efforts are continuing under NASA support to improve the readiness level of solar sail technology. Solar sails have one of the best chances to be the next gossamer spacecraft flown in space. In the gossamer spacecraft community thus far, solar sails
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18f93aa693603bebec1b8d107e4891dc
https://doi.org/10.2514/6.2004-1510
https://doi.org/10.2514/6.2004-1510
Autor:
Gregory H. Ames, John M. Rakoczy, John A. Booth, Edward E. Montgomery, James R. Fowler, Mark T. Adams, Marsha J. Wolf, Povilas Palunas
Publikováno v:
SPIE Proceedings.
A sensing and control system for maintaining the optical alignment of the ninety-one 1-meter diameter hexagonal segments forming the Hobby-Eberly Telescope (HET) primary mirror array has been developed by NASA - Marshall Space Flight Center (Huntsvil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7608f284cff6de319d729cce523d4b0e
https://doi.org/10.1117/12.458006
https://doi.org/10.1117/12.458006
Autor:
Gregory H. Ames, John A. Booth, William Ly, John T. Weir, Edward E. Montgomery, James R. Fowler, John M. Rakoczy, Mark T. Adams, Richard T. Howard, Drew Hall
Publikováno v:
SPIE Proceedings.
The Segment Alignment Maintenance System (SAMs) was installed on McDonald Observatory's Hobby-Eberly Telescope (HET) in August 2001. The SAMs became fully operational in October 2001. The SAMs uses a system of 480 inductive edge sensors to correct mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1295962ba0e492e441ea8cb24d63bd44
https://doi.org/10.1117/12.456734
https://doi.org/10.1117/12.456734
Publikováno v:
SPIE Proceedings.
A system, which estimates the global radius of curvature (GroC) and corrects for changes in GroC on a segmented primary mirror has been developed for and verified on McDonald Observatory's Hobby Eberly Telescope (HET). The GroC estimation and control
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74b06d2da175138906cc3a1badb95fce
https://doi.org/10.1117/12.456650
https://doi.org/10.1117/12.456650