Feedforward Control
Mostrando 1-12 de 63 artigos, teses e dissertações.
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1. Artificial motor control for electrically stimulated upper limbs of plegic or paretic people
Introduction: Functional Electrical Stimulation (FES) is a technique used in the restoration and generation of movements performed by subjects with neuromuscular disorders such as spinal cord injury (SCI). The purpose of this article is to outline the state of the art and perspectives of the use of FES in artificial motor control of the upper limbs in pareti
Res. Biomed. Eng.. Publicado em: 14/06/2016
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2. PREDICTIVE CONTROL OF A BATCH POLYMERIZATION SYSTEM USING A FEEDFORWARD NEURAL NETWORK WITH ONLINE ADAPTATION BY GENETIC ALGORITHM
Abstract This study used a predictive controller based on an empirical nonlinear model comprising a three-layer feedforward neural network for temperature control of the suspension polymerization process. In addition to the offline training technique, an algorithm was also analyzed for online adaptation of its parameters. For the offline training, the networ
Braz. J. Chem. Eng.. Publicado em: 2016-03
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3. PRELIMINARY MODELING OF AN INDUSTRIAL RECOMBINANT HUMAN ERYTHROPOIETIN PURIFICATION PROCESS BY ARTIFICIAL NEURAL NETWORKS
Abstract In the present study a preliminary neural network modelling to improve our understanding of Recombinant Human Erythropoietin purification process in a plant was explored. A three layer feed-forward back propagation neural network was constructed for predicting the efficiency of the purification section comprising four chromatographic steps as a func
Braz. J. Chem. Eng.. Publicado em: 2015-09
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4. Aging related responses to conflicting proprioceptive and visual information about initial position during reaching
INTRODUCTION: The purpose of the current study was to examine whether age-related differences are exhibited in the relative contributions of vision and proprioception with initial hand position to the control of movement distance of single-joint reaching movements. METHODS: We use a virtual reality display to systematically change the relationship between th
Rev. Bras. Eng. Bioméd.. Publicado em: 2013-09
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5. Modeling of an industrial process of pleuromutilin fermentation using feed-forward neural networks
This work investigates the use of artificial neural networks in modeling an industrial fermentation process of Pleuromutilin produced by Pleurotus mutilus in a fed-batch mode. Three feed-forward neural network models characterized by a similar structure (five neurons in the input layer, one hidden layer and one neuron in the output layer) are constructed and
Braz. J. Chem. Eng.. Publicado em: 2013-03
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6. Neural regulation of the stress response: glucocorticoid feedback mechanisms
The mammalian stress response is an integrated physiological and psychological reaction to real or perceived adversity. Glucocorticoids are an important component of this response, acting to redistribute energy resources to both optimize survival in the face of challenge and to restore homeostasis after the immediate challenge has subsided. Release of glucoc
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-04
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7. Desenvolvimento de procedimento e Soft-Sensors para controle de plantas de PET / Development of procedures and Soft-Sensors for control in PET plants
Neste trabalho são apresentados três estudos distintos de aplicação de Plantwide Control. A primeira aplicação trata-se de um controle antecipativo (feedforward) para controlar os níveis dos reatores na etapa de polimerização, a fim de reduzir suas variabilidades e, consequentemente, a produção de refugo, sendo que, em uma planta de Politereftalat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2011
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8. Autonomic control of cardiorespiratory interactions in fish, amphibians and reptiles
Control of the heart rate and cardiorespiratory interactions (CRI) is predominantly parasympathetic in all jawed vertebrates, with the sympathetic nervous system having some influence in tetrapods. Respiratory sinus arrhythmia (RSA) has been described as a solely mammalian phenomenon but respiration-related beat-to-beat control of the heart has been describe
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-07
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9. Arquitetura aberta para controle de robôs manipuladores
Este documento trata da especificação de uma arquitetura aberta para controle de robôs manipuladores. A arquitetura é implementada utilizando o framework do projeto OROCOS, ambiente que já foi utilizado com sucesso em alguns sistemas de controle de robôs. Esta arquitetura é especificada para um robô manipulador genérico de N juntas, definindo compon
Publicado em: 2010
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10. Estudo comparativo de estratégias de controle para inversores de fontes ininterruptas de energia. / A comparative study of control strategies in inverters for uninterruptible power supllies.
Este trabalho tem como objetivo reunir, registrar, estudar e comparar as estratégias de controle utilizadas em inversores para fontes ininterruptas de energia, efetuado através de levantamento bibliográfico, englobando estratégias antigas (implementadas muitas vezes na forma analógica) e recentes (com implementação digital). É realizada comparação
Publicado em: 2010
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11. Desenho e uso dos sistemas de controle gerencial e sua contribuição para a formação e implementação da estratégia organizacional / Design and use of the management control systems and its contribution to the formation and implementation of organizational strategy
Para assegurar o alcance de seus objetivos, as organizações utilizam sistemas de controle gerencial (SCG), os quais podem ser analisados sob duas dimensões distintas. A primeira é a dimensão desenho, que compreende as características de configuração técnica dos SCG. A segunda é a dimensão uso, que representa as diferentes finalidades de aplicaçã
Publicado em: 2010
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12. STUDY, CONTROL AND IMPLEMENTATION OF THE PFC BOOST CONVERTER OPERATING IN MIXED CONDUCTION MODE / ESTUDO, CONTROLE E IMPLEMENTAÇÃO DO CONVERSOR BOOST PFC OPERANDO NO MODO DE CONDUÇÃO MISTA
This Master Thesis presents the study and proposes a digital control system applied to the PFC boost converter operating in mixed conduction mode. The motivation to this subject, a bibliographic review of the existing current control techniques and the objectives of this work are presented in the first chapter. The control system is composed of a current loo
Publicado em: 2009