Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Lena Valavani"'
Autor:
Ioannis Kitsios, Naira Hovakimyan, Isaac Kaminer, Lena Valavani, Enric Xargay, Vladimir Dobrokhodov, Chengyu Cao, Irene M. Gregory
Publikováno v:
Journal of Guidance, Control, and Dynamics. 34:1311-1328
The paper presents new results on the verification and in-flight validation of an L1 adaptive flight control system, and proposes a general methodology for verification and validation of adaptive flight control algorithms. The proposed framework is b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbc11571b0254bdbd19a99881f0c02d1
https://doi.org/10.2514/1.50683
https://doi.org/10.2514/1.50683
Publikováno v:
Automatica. 30:1357-1373
An analytical model for control of rotating stall has been obtained from the basic fluid equations describing the process at inception. The model describes rotating stall as a traveling wave packet, sensed—in spatial components—via the Fourier de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::365c2d6c2a223c451a5d7713b93ce5bb
https://doi.org/10.1016/0005-1098(94)90001-9
https://doi.org/10.1016/0005-1098(94)90001-9
Publikováno v:
Automatica. 30:251-263
In this paper we present the solutions to the optimal l2 to l2 disturbance rejection problem ( H ∞ ) as well as to the LQG ( H 2 ) problem in periodic systems using the lifting technique. Both problems involve a causality condition on the optimal L
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd3ca663438edd524e9f4c1e68ce6898
https://doi.org/10.1016/0005-1098(94)90028-0
https://doi.org/10.1016/0005-1098(94)90028-0
Publikováno v:
Journal of Dynamic Systems, Measurement, and Control. 115:694-703
A low-speed axial research compressor has been fitted with movable inlet guide vanes to allow for feedback stabilization of rotating stall. A model exists whose structure captures the input-output behavior, and stabilization of rotating stall is poss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05ff4694b4dc8af93e721a5ea47b9c06
https://doi.org/10.1115/1.2899198
https://doi.org/10.1115/1.2899198
Autor:
Dragan Obradovic, Lena Valavani
Publikováno v:
Automatica. 28:827-830
This paper is concerned with Riccati equation based analysis methods for determining stability and performance of perturbed feedback systems. The elements of the state-space representation of the systems are assumed to be linearly perturbed with real
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fb25c41369e8de2c043c7de6cc61f49
https://doi.org/10.1016/0005-1098(92)90045-h
https://doi.org/10.1016/0005-1098(92)90045-h
Publikováno v:
IEEE Transactions on Automatic Control. 37:90-99
The problem of optimal rejection of bounded persistent disturbances is solved in the case of linear discrete-time periodic systems. The solution consists of solving an equivalent time-invariant standard l/sup 1/ optimization problem subject to an add
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21f6b7ef6d888d018f827aeb723d2a4b
https://doi.org/10.1109/9.109641
https://doi.org/10.1109/9.109641
Publikováno v:
Journal of Dynamic Systems, Measurement, and Control. 113:93-103
This study addresses the uses of adaptive schemes for on-line control of backbead width in the Gas Tungsten Arc (GTA) welding process. Open-loop tests using a step input current confirm the validity of a nominal first order process model. However, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af06697a9f73a01b30f2ec8cf85d86dd
https://doi.org/10.1115/1.2896365
https://doi.org/10.1115/1.2896365
Publikováno v:
Automatica. 27:23-38
This paper presents a frequency-domain estimator that can identify both a parametrized nominal model of a plant as well as a frequency-domain bounding function on the modeling error associated with this nominal model. This estimator, which we call a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ec839c6d238ec50206ac6c2ece56887
https://doi.org/10.1016/0005-1098(91)90004-l
https://doi.org/10.1016/0005-1098(91)90004-l
Autor:
Petros G. Voulgaris, Lena Valavani
Publikováno v:
Journal of Guidance, Control, and Dynamics. 14:157-165
Recent efforts by the National Aeronautics and Space Administration Langley Research Center have focused on expanding the flight envelope of the F/A-18 aircraft. Of particular concern has been the low speed, high angle-of-attack regime over which the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::147683a9bd0caf190f5d6a009eba47ac
https://doi.org/10.2514/3.20617
https://doi.org/10.2514/3.20617
Autor:
Lena Valavani, D. Obradovic
Publikováno v:
Proceedings of the 28th IEEE Conference on Decision and Control.
This study deals with the stability and performance conditions of a closed loop system whose A matrix depends linearly on the magnitude bounded real parameter perturbation. An analysis approach based on the existence of a common solution P=P'>or=0 to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e26447a1e7cd264a9144fef29814349
https://doi.org/10.1109/cdc.1989.70509
https://doi.org/10.1109/cdc.1989.70509