Weighting Functions
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Posicionamento de sensores/atuadores e escolha de funções de ponderação no controle H-infinito de vibrações / Placement of sensors/actuators and selection of weighting functions in H-infinity control of vibrations
In this work it was used the H infinite control to atenuate vibrations in mechanical structures. Linear matrix inequalities are used to find the optimal controller. Sensors and actuators are incorporated into the project. To determine the best place to allocate them in the structure two methods are used: the first is based on the highest closed-loop H infini
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2012
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2. A influência dos parâmetros de Análise por Semântica Latente aplicada a localização de defeitos de software
During its life cycle, software systems must pass through continuous change to have bugs fixed and get a reasonable conformance between user requirements and implemented software functions. The necessary effort to execute such changes that occur in the software maintenance phase is considerable and is influenced by the developer software comprehension level.
Publicado em: 2011
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3. A comparison of hyperbolic solvers II: ausm-type and Hybrid Lax-Wendroff-Lax-Friedrichs methods for two-phase flows
Riemann-solver based schemes are difficult and sometimes impossible to be applied for complex flows due to the required average state. Other methods that do not use Riemann-solvers are best suited for such cases. Among them, AUSM+, AUSMDV and the recently proposed Hybrid Lax-Friedrichs-Lax-Wendroff (HLFW) have been extended to two-phase flows. The eigenstruc
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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4. Vibration H-infinity control with constrained force signal / Controle H-infinito de vibrações com restrições no esforço de controle
In this work, the H8 control of vibrations problem taking into account the effects of saturation of actuators is studied. Two situations of interest were explored. The first one considers that saturation should be avoided and does not cause damage to the system, even if this situation leads to loss of performance. The second alternative seeks to modify the c
Publicado em: 2009
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5. Estudo de tecnicas de controle H-infinito para estruturas flexiveis com intercentezas / A study on H-inifinity control techniques for uncertain flexible structures
This dissertation deals with modern techniques from the Robust H? Control of Linear Dynamic Systems. By this it is meant that the results from linear control systems theory are used as mathemathical tools when considering several kinds of uncertainty on the models. These models are mostly of flexible structures and the design methods are implemented using so
Publicado em: 2008
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6. Controle H-infinito não linear e a equação de Hamilton Jacobi-Isaacs. / Nonlinear H-infinity control and the Hamilton-Jacobi-Isaacs equation.
O objetivo desta tese é investigar aspectos práticos que facilitem a aplicação da teoria de controle H1 não linear em projetos de sistemas de controle. A primeira contribuição deste trabalho é a proposta do uso de funções ponderação com dinâmica no projeto de controladores H1 não lineares. Essas funções são usadas no projeto de controladores
Publicado em: 2008
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7. A contribution to the study about multicriterion optimization methods / Uma contribuição ao estudo dos métodos de otimização multi-objetivo
In optimization problems, there are many situations in which the users goal is to minimize and or maximize several functions simultaneously, instead of dealing with a single objective function. These functions form a mathematical description of performance criteria, which are usually in conflict with each other. This situation is formulated as a multicriteri
Publicado em: 2005
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8. Controlador nebuloso de arquitetura simplificada estudo de caso : acionamento de motor de indução trifasico
This work presents a new approach of a simple and efficient digital controller, which uses the fuzzy logic concepts to drive a three-phase induction motor in a practical engineering application. In order to represent the membership functions and carry out the weighting up of linguistic terms a custom structure was used in the fuzzy logic controller. The perf
Publicado em: 2004
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9. Estudo das variacoes das funcoes-peso em microondas sobre o Brasil, utilizando o modelo ATM / Study of variations of the weighting functions over Brazil, using the ATM model
The weighting functions of the ten Advanced Microwave Sounding Unit (AMSU) channels of Advanced TIROS-N/NOAA Operational Vertical Sounder (ATOVS), calculated from the Atmosphere Transmission at Millimetric and Submillimetric Wavelengths (ATM) model, were compared with those from the AMSU/ATOVS. Among the ten channels, five refer to the oxygen absorption line
Publicado em: 1999
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10. Linear and nonlinear pathways of spectral information transmission in the cochlear nucleus
At the level of the cochlear nucleus (CN), the auditory pathway divides into several parallel circuits, each of which provides a different representation of the acoustic signal. Here, the representation of the power spectrum of an acoustic signal is analyzed for two CN principal cells—chopper neurons of the ventral CN and type IV neurons of the dorsal
The National Academy of Sciences.
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11. Chromosome 18 DNA markers and manic-depressive illness: evidence for a susceptibility gene.
In the course of a systematic genomic survey, 22 manic-depressive (bipolar) families were examined for linkage to 11 chromosome 18 pericentromeric marker loci, under dominant and recessive models. Overall logarithm of odds score analysis for the pedigree series was not significant under either model, but several families yielded logarithm of odds scores cons
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12. Spatio-temporal interactions in cat retinal ganglion cells showing linear spatial summation.
The spatio-temporal characteristics of cat retinal ganglion cells showing linear summation have been studied by measuring both magnitude and phase of the responses of these cells to drifting or sinusoidally contrast-modulated sinusoidal grating patterns. It has been demonstrated not only that X cells behave approximately linearly when responding with amplitu