Smith Predictor
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. ADVANCED CONTROL OF A COMPLEX CHEMICAL PROCESS
Abstract Three phase catalytic hydrogenation reactors are important reactors with complex behavior due to the interaction among gas, solid and liquid phases with the kinetic, mass and heat transfer mechanisms. A nonlinear distributed parameter model was developed based on mass and energy conservation principles. It consists of balance equations for the gas a
Braz. J. Chem. Eng.. Publicado em: 2016-03
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2. Control of integrating process with dead time using auto-tuning approach
A modification of Smith predictor for controlling higher order processes with integral action and long dead-time is proposed in this paper. The controller used in this Smith predictor is an Integral-Proportional Derivative controller, where the Integrator is in the forward path and the Proportional and Derivative control are in the feedback, acting on the fe
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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3. Redes IP em aplicações de controle em malha fechada : proposta de estratégias para lidar com o indeterminismo temporal
Este trabalho apresenta uma proposta de solução para compensar o atraso variável, característico de redes IP. O preditor de Smith é tradicionalmente usado para compensar atrasos, mas no caso deste tipo de rede um fator importante que pode degradar o controle do sistema são as grandes variações nos atrasos sofridos pelas mensagens. Para tratar este pr
Publicado em: 2009
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4. Modeling and control of a heat exchanger pipe beam type. / Modelagem e controle de um trocador de calor feixe tubular.
This work presents thorough a supervision and control system project of a heat exchanger, from the experimental tests for the mathematical model rising to the control system implementation and supervision in a microcomputer. The implemented system consists of didactic software and a data acquisition system that will perform the supervision and control of a h
Publicado em: 2006
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5. Modelagem e controle de CO2 em câmaras de topo aberto utilizadas em estudos de fisiologia vegetal. / Modelling and control of CO2 in open-top chambers used on vegetal physiology researches.
As atividades sócio-econômicas vêm provocando alterações nocivas ao meio ambiente que atualmente assumem proporções mundiais. Graças à maciça utilização de combustíveis fósseis para a geração de energia e às crescentes práticas de desmatamento e queimadas das florestas, a concentração de dióxido de carbono (CO2) na atmosfera vem aumentan
Publicado em: 2006
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6. Responses to prospective payment by rural New Mexico hospitals.
A cross-sectional study is used to determine how rural New Mexico hospitals altered service diversification, inpatient service emphasis, and service promotion during Medicare's prospective payment system (PPS) transition and posttransition phases. Results suggest that the hospitals implemented distinct strategies in response to PPS. The posttransition strate
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7. Detection of abnormality of fetal urinary tract as a predictor of renal tract disease.
Over three years all infants in this hospital found to have an abnormality of the urinary tract on antenatal scanning were followed up after delivery with contrast radiography. Disease of the renal tract was confirmed in 17 of 20 infants. Of the 15 survivors, 12 underwent surgery in the first year of life. Abnormality of the fetal urinary tract detected by u
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8. Use of the Microbial Growth Curve in Postantibiotic Effect Studies of Legionella pneumophila
Using the standard Craig and Gudmundsson method (W. A. Craig and S. Gudmundsson, p. 296-329, in V. Lorian, ed., Antibiotics in Laboratory Medicine, 1996) as a guideline for determination of postantibiotic effects (PAE), we studied a large series of growth curves for two strains of Legionella pneumophila. We found that the intensity of the PAE was best determ
American Society for Microbiology.