Relay Feedback
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Tuning of multivariable decentralized controllers through the ultimate-point method
A successful method for tuning single-loop PID controllers is the ultimate-point method. This method is based on the identification of the ultimate point of the process’ frequency response followed by its shifting, through appropriate choices of the controller’s parameters, to a specified location of the complex plane. This paper presents an extension of
Publicado em: 2011
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2. Sintonia de controladores PID descentralizados baseada no método do ponto crítico
Controladores PID são largamente utilizados no controle de processos industriais, tanto em sistemas monovariáveis como em sistemas multivariáveis. No entanto, muitos dos controladores encontrados na indústria são mal sintonizados. Um dos métodos mais simples de sintonia de controladores PID consiste em identificar algumas grandezas, as quais se relacio
Publicado em: 2007
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3. Estudo, proposta e avaliação de novas metodologias de sintonia automática de controladores PID baseadas no ensaio do relé realimentado / Study, propose and evaluation of new auto-tuning methodologies of PID controllers based on the relay feedback test
A marcante presença dos controladores PID (Proporcional-Integral-Derivativo) na indústria e as dificuldades de ajuste eficiente destes controladores têm motivado o surgimento de inúmeras técnicas de sintonia, dentre as quais destacam-se as que utilizam ensaios com relés. Na área de dinâmica estrutural não é raro encontrar sistemas oscilatórios com
Publicado em: 2002
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4. A dendrodendritic reciprocal synapse provides a recurrent excitatory connection in the olfactory bulb
Neuronal synchronization in the olfactory bulb has been proposed to arise from a diffuse action of glutamate released from mitral cells (MC, olfactory bulb relay neurons). According to this hypothesis, glutamate spills over from dendrodendritic synapses formed between MC and granule cells (GC, olfactory bulb interneurons) to activate neighboring MC. The
The National Academy of Sciences.
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5. Two-phase regulatory pathway controls cAMP receptor-mediated expression of early genes in Dictyostelium.
Two classes of early genes in Dictyostelium are differentially regulated by extracellular pulses of cAMP interacting with its cell-surface receptor, conditions that also regulate chemotaxis and aggregation. The pulse-repressed genes, such as K5, are induced shortly after the onset of starvation and are repressed a few hr later during aggregation by cAMP puls
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6. Spatial frequency tuning of orientation-discontinuity-sensitive corticofugal feedback to the cat lateral geniculate nucleus.
1. The influence of spatial frequency on the inhibitory component of the effects mediated by feedback from the visual cortex has been examined in X and Y cells in the A laminae of the feline dorsal lateral geniculate nucleus (dLGN). Experiments utilized a concentric, bipartite visual stimulus centered over the receptive fields of the cells studied. The respo
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7. Lesions in the cat prepositus complex: effects on the optokinetic system.
The effects of bilateral lesions within and around the prepositus hypoglossi (p.h.) nuclei on the optokinetic system were studied. The pure optokinetic nystagmus (o.k.n.) was evoked by a step of velocity (60 deg/s, 30 s duration) of the surrounding. The visual-vestibular interaction was investigated by measuring the gain and phase of the vestibulo-ocular ref