H Infinity
Mostrando 13-24 de 144 artigos, teses e dissertações.
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13. Estabilidade e síntese de controladores e filtros robustos para sistemas com retardo no tempo: novas fronteiras
This thesis is dedicated to the study of some inherent problems in continuous-time systems with time delay. The thesis is divided into two parts; the first one shows that to study the stability of an autonomous linear system with constant time delay is equivalent to assess the roots of a rational function of appopriate degree. The second part deals with a se
Publicado em: 2008
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14. Investigation of multivariable control techniques for attitude control of a rigid satellite - flexible / Investigação de técnicas de controle multivariáveis no controle de atitude de um satélite rígido - flexível
The main objective of this work is the investigation of multivariable control techniques for attitude control of a Rigid Satellite - Flexible. For this investigation, a satellite model was developed consisting of a rigid body and two flexible panels. The investigated techniques are Linear Quadratic Regulator (LQR) method, Linear Quadratic Gaussian (LQG) meth
Publicado em: 2008
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15. Controle H-infinito de sistemas lineares com infinitos saltos Markovianos via realimentação de saída / Output feedback H-infinity control of infinite Markov jump linear systems
Este trabalho trata do problema de controle H-infinito de uma classe de sistemas lineares com saltos Markovianos (MJLS) a tempo contínuo, onde a cadeia de Markov toma valores em um conjunto infinito enumerável. Um bounded real lemma (que chamamos JBRL) é desenvolvido, estabelecendo que a factibilidade de um conjunto infinito de desigualdades matriciais li
Publicado em: 2007
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16. Estudo de robustez em sistemas lineares por meio de relaxações em termos de desigualdades matriciais lineares / Robustness of linear systems by means of linear matrix inequalities relaxations
This thesis proposes, as main contribution, a new methodology to solve parameterdependent linear matrix inequalities which frequently appear in robust analysis and control problems of linear system with polytopic uncertainties. The proposed method relies on the parametrization of the solutions in terms of homogeneous polynomials of arbitrary degree with matr
Publicado em: 2006
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17. Controladores adaptativos não-lineares com critério H INFINITOaplicados a robôs espaciais / Adaptive nonlinear H INFINITEcontrollers applied to free-floating space manipulators
Neste trabalho, o equacionamento dinâmico de um manipulador espacial de base livre flutuante é descrito a partir do conceito do manipulador dinamicamente equivalente para que as técnicas de controle desenvolvidas sejam experimentalmente validadas em um manipulador convencional de base fixa. Dois tipos de controle de movimento são considerados. O primeiro
Publicado em: 2006
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18. Study of analgesic effects and plasmatics concentrations of tramadol in female dogs submitted to ovaryhisterectomy / Estudo dos efeitos analgésicos e das concentrações plasmáticas do tramadol em cadelas submetidas a ovário-salpingo-histerectomia
The aim of this study was to use an analytic method to tramadol quantification in the plasma of female dogs submitted to ovaryhisterectomy, evaluate the plasmatic concentrations and its analgesic effect on these animals. First of all, there were made the ovaryhisterectomy surgeries and posterior pain evaluation in 12 female dogs divided in 2 groups of 6 anim
Publicado em: 2006
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19. Controle H2/H Infinito de estruturas flexiveis atraves de desigualdades matriciais lineares com alocação de polos / H2/H "Infinity control of flexible strructures through linear matrix inequalities with pole placement
o objetivo deste trabalho é aplicar o controle H2/H Infinito usando desigualdades matriciais lineares com restrições de alocação de pólos em estruturas flexíveis. O problema de controle H2/H Infinito é uma técnica usada para a obtenção de controladores com as propriedades do controle norma H2, que trás desempenho ótimo, e do controle norma H Inf
Publicado em: 2005
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20. Mixed H2 / H Infinity control through linear inequalities for flexible structures vibration reduction / Controle H2 / H Infinito via desigualdades matriciais lineares para atenuação de vibrações em estruturas flexiveis
This work has the goal to verify the action of a mixed H2/ Hoo control formulation through output feedback for a structure modelIed in finite elements. Therefore, the pure H2 and Hoo control formulations through output feedback are also verified to validate the described equations in this work for the mixed control and show a reference to their expected resu
Publicado em: 2005
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21. Estudo de bioequivalencia de duas formulações de comprimidos de fluconazol em voluntarios sadios
The bioequivalence study of two fluconazole tablet formulations: Fluconal (from Laboratório Libbs), and Zoltec (from Laboratório Pfizer) were compared in eighteen healthy male volunteers who received a single dose of 150 mg of each formulation, in an open randomized two period crossover fashion with a fourteen day washout interval between doses. Plasma sam
Publicado em: 1997
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22. The asymmetrical effects of some ionized n-octyl derivatives on the sodium current of the giant axon of Loligo forbesi.
The effects of octyltrimethylammonium ions (OTMA+), octyl sulphate ions (OS-) and octanoic acid (OA) on the sodium current of the voltage-clamped squid giant axon have been investigated using intracellular and extracellular application of the test substances. OTMA+ applied externally at concentrations of 0.8-5.0 mM produces a small reversible increase in the
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23. Biotransformation and elimination of [2-14C]-1-(2-deoxy-2'-fluoro-beta-D -arabinofuranosyl)-5-iodocytosine in immunosuppressed patients with herpesvirus infections.
The metabolism of the drug [2-14C]-1-(2'-deoxy-2'-fluoro-beta-D -arabinofuranosyl)-5-iodocytosine (FIAC), a potent inhibitor of herpesvirus replication, was studied in immunosuppressed patients with herpesvirus infections. FIAC was administered intravenously by 15-min infusion and by mouth 24 h later to four patients at doses of 50 or 100 mg/m2. FIAC was cle
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24. Single-dose pharmacokinetics of delavirdine mesylate and didanosine in patients with human immunodeficiency virus infection.
Delavirdine is a nonnucleoside reverse transcriptase inhibitor with in vitro activity against human immunodeficiency virus type 1 (HIV-1) that is currently being evaluated in combination regimens with various nucleoside analogs, including didanosine. Due to the pH-dependent solubility of delavirdine, the buffering agents in didanosine formulations may reduce