Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Wodek Gawronski"'
Autor:
Fidelis O. Eke, Jesse Leitner, Michael B. McFarland, Hari B. Hablani, Robert G. Melton, Jurek Z. Sasiadek, David B. Doman, Kevin A. Wise, Lu Ping, Maruthi R. Akella, Sivasubramanya N. Balakrishnan, Vivekanand Mukhopadhyay, George T. Schmidt, Wodek Gawronski, Russell J. Enns, Malcolm Macdonald, John-Paul Clarke, Hanspeter Schaub, James Mitchell, Mark Campbell, John L. Crassidis, Richard Colgren
Publikováno v:
Journal of Guidance, Control, and Dynamics. 32:1-7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06c9cef31e407fb71c9479bb2febd0d5
https://doi.org/10.2514/1.42155
https://doi.org/10.2514/1.42155
Autor:
Maruthi R. Akella, Hanspeter Schaub, Michael B. McFarland, Russell J. Enns, E. Glenn Lightsey, Sivasubramanya N. Balakrishnan, Jurek Z. Sasiadekj, Robert G. Melton, Wodek Gawronski, Jesse Leitner, Richard Colgren, Colin R. McInnes, David B. Doman, Kevin A. Wise, James Mitchell, Hari B. Hablani, George T. Schmidt, John L. Crassidis, M. Bala Subrahmanyam, Fidelis O. Eke, Ping Lu, Vivekanand Mukhopadhyay
Publikováno v:
Journal of Guidance, Control, and Dynamics. 31:1-6
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::846c436867c5cc97c314090e217e3f3a
https://doi.org/10.2514/1.35879
https://doi.org/10.2514/1.35879
Autor:
Wodek Gawronski
Publikováno v:
IEEE Antennas and Propagation Magazine. 49:40-46
The performance of an antenna control system is evaluated using performance parameters such as settling time, bandwidth, steady-state error in rate offsets, and antenna root-mean-square servo error while tracking in wind gusts. The performance parame
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6cdd57824fe9bce9b04acd06d7c6801
https://doi.org/10.1109/map.2007.4455845
https://doi.org/10.1109/map.2007.4455845
Autor:
Wodek Gawronski
Publikováno v:
IEEE Transactions on Control Systems Technology. 15:276-289
Extremely large telescopes will be constructed in the near future, and new radiotelescopes will operate at considerably higher radio frequencies; both features create significantly increased pointing accuracy requirements that have to be addressed by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30b62496bcec09de6933541ec93797b0
https://doi.org/10.1109/tcst.2006.886434
https://doi.org/10.1109/tcst.2006.886434
Publikováno v:
IEEE Antennas and Propagation Magazine. 47:55-59
Accurate information about the action of wind on antennas is required for the sizing of antenna motors and for reliable prediction of antenna pointing errors in windy weather. For these purposes, wind-tunnel data were obtained 40 years ago, using a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84c885b5a821f8dffcd8e2a34338dfe0
https://doi.org/10.1109/map.2005.1599166
https://doi.org/10.1109/map.2005.1599166
Autor:
Wodek Gawronski
Publikováno v:
IFAC Proceedings Volumes. 38:223-228
The LQG controllers significantly improve antenna tracking precision, but their tuning is a trial-and-error process. A control engineer has two tools to tune an LQG controller: the choice of coordinate system of the controller, and the selection of w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4db898884d897304999f62090597555a
https://doi.org/10.3182/20050703-6-cz-1902.01998
https://doi.org/10.3182/20050703-6-cz-1902.01998
Autor:
Wodek Gawronski
Publikováno v:
IEEE Antennas and Propagation Magazine. 46:50-58
This paper develops and compares three wind models used to simulate antenna pointing errors. The first model represents wind forces acting on the antenna dish, thus closely representing actual wind action. The second model represents wind gusts as to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96909bcf9eb35d4bdb1e8b9efe36d18c
https://doi.org/10.1109/map.2004.1296144
https://doi.org/10.1109/map.2004.1296144
Autor:
Wodek Gawronski
Publikováno v:
Journal of Sound and Vibration. 264:983-1004
The paper presents and analyses the H 2 , H ∞ , and Hankel norms of flexible structures. The analysis is conducted for the discrete-time models of structures and compared with the continuous-time results. The structural state-space models are prese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e80db3f5f3b6ce1437fdf8ab1f2a1f4f
https://doi.org/10.1016/s0022-460x(02)01184-7
https://doi.org/10.1016/s0022-460x(02)01184-7
Autor:
W.T. Almassy, Wodek Gawronski
Publikováno v:
IEEE Antennas and Propagation Magazine. 44:30-37
The LQG (linear-quadratic-Gaussian) controllers, designed for the NASA Deep Space Network antennas, have small tracking errors and are resistant to wind disturbances. However, they induce limit cycling during antenna-slewing operations and target acq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34f2a43a172dfc4a5fe45ae78d382e53
https://doi.org/10.1109/map.2002.1003632
https://doi.org/10.1109/map.2002.1003632
Autor:
Wodek Gawronski
Publikováno v:
IEEE Antennas and Propagation Magazine. 43:52-60
This paper discusses the compensation of antenna-pointing errors following the analysis and retrofit of the NASA Deep Space Network antenna control systems. The desired high-frequency communications with spacecraft (at Ka-band) require improved point
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3200b404dfb6168d002e60cff36f980b
https://doi.org/10.1109/74.920018
https://doi.org/10.1109/74.920018