Zobrazeno 1 - 10
of 15
pro vyhledávání: '"F. L. Markley"'
Autor:
F. L. Markley
Publikováno v:
Journal of Guidance, Control, and Dynamics. 31:765-768
A SIMPLE counting argument shows that a minimum of two unit-vector measurements, with two independent scalar pieces of information each, are required to determine the 3 degrees of freedom needed to specify a spacecraft’s attitude. The earliest publ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a596d6a719cd4fd5239d63fb82594ecf
https://doi.org/10.2514/1.35597
https://doi.org/10.2514/1.35597
Publikováno v:
Journal of Guidance, Control, and Dynamics. 18:247-255
The next generation of the Geostationary Operational Environmental Satellite (GOES-N) will require extremely stringent pointing performance for improved weather prediction. These spacecraft will employ high-precision gyros and star trackers in a,uniq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d9979ba7e752b4b202f3acd8aeabf2c
https://doi.org/10.2514/3.21377
https://doi.org/10.2514/3.21377
Autor:
John L. Crassidis, F. L. Markley
Publikováno v:
Journal of Guidance, Control, and Dynamics. 19:1381-1383
Introduction Spacecraft pointing poses a complex problem involving nonlinear dynamics with either linear and/or nonlinear control laws. Primary control actuators usually include thrusters for rapid and coarse attitude maneuvers, and reaction wheels f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::763972b4e01054ef1022da26d459087d
https://doi.org/10.2514/3.21798
https://doi.org/10.2514/3.21798
Autor:
I.Y. Bar-Itzhack, F. L. Markley
Publikováno v:
Proceedings of the 27th IEEE Conference on Decision and Control.
The authors present an improved algorithm for computing the V-Lambda solution of the matrix Riccati equation. The improvement is in the reduction of the computational load, results from the orthogonality of the eigenvector matrix that has to be solve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ba5386fb1c8897c195af377fcd5d65d
https://doi.org/10.1109/cdc.1988.194336
https://doi.org/10.1109/cdc.1988.194336
Autor:
F. L. Markley
Publikováno v:
Journal of Guidance, Control, and Dynamics. 17:407-409
(5) The assumed orthogonality of A and properties of the trace give \\A -B\\ 2 = tr[(A -B)(A -B)T] = 3-2 tr(ABT) + \\B\\ (6)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65fe783942ab25fddbe6a3064187d191
https://doi.org/10.2514/3.21212
https://doi.org/10.2514/3.21212
Autor:
F. L. Markley, John L. Crassidis
Publikováno v:
Guidance, Navigation, and Control Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1df609443ce40a482849a50e17ccd5cd
https://doi.org/10.2514/6.1996-3775
https://doi.org/10.2514/6.1996-3775
Autor:
John L. Crassidis, F. L. Markley
Publikováno v:
Guidance, Navigation, and Control Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80ca5734ce8f521da89d5a1135eea5f9
https://doi.org/10.2514/6.1995-3276
https://doi.org/10.2514/6.1995-3276
Publikováno v:
Guidance, Navigation, and Control Conference.
In this paper, a new real-time filter and state estimator is developed which provides a method of determining optimal state estimates in the presence of significant error in the assumed (nominal) model. Also, the new algorithm is able to determine ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e75ca72aa232c2e7e486891146983c3
https://doi.org/10.2514/6.1994-3550
https://doi.org/10.2514/6.1994-3550
Publikováno v:
Guidance, Navigation and Control Conference.
The purpose of this paper is to document the on-orbit testing of the Zero-Gyro Sunpoint mode for Hubble Space Telescope, a safemode designed to ensure a power positive state without the use of rate gyros. This paper presents an overview of the test p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3d4eb6c80ae1fa077117528fe27331a
https://doi.org/10.2514/6.1993-3831
https://doi.org/10.2514/6.1993-3831
Autor:
F. L. Markley, John D. Nelson
Publikováno v:
Astrodynamics Conference.
The purpose of this paper is to document the Zero-Gyro Sunpoint mode for Hubble Space Telescope, a safemode designed to ensure a power positive state without the use of rate gyros. This paper presents an overview of the Zero-Gyro Sunpoint algorithm,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3403eda9cafeff5489a2680e2297c546
https://doi.org/10.2514/6.1992-4613
https://doi.org/10.2514/6.1992-4613