Multivariable Processes
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. CONTROL PROPOSAL FOR A HIGH PURITY COLUMN BASED ON THE SEPARATION OF VARIABLES BY THE INDEPENDENT COMPONENT ANALYSIS METHOD
Abstract Many industries are complex when it comes to operation mode. In order to reduce the problems related to strong coupling in these processes, the search for the incorporation of artificial intelligence devices has shown an increasing trend in recent years. Due to this complexity and control in multivariable processes, diagnosis and fault monitoring in
Braz. J. Chem. Eng.. Publicado em: 2017-01
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2. 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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3. Modelagem de uma planta didática multivariável e não linear
O objetivo deste trabalho é mostrar o desenvolvimento do modelo de uma planta didática não linear e multivariável usando a resposta ao degrau. Esta planta didática é do curso técnico de automação industrial do IFES SERRA (ES). A partir das equações físicas do processo são desenvolvidas as relações entre as variáveis controladas e as variávei
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/05/2010
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4. Use of solar energy in the treatment of water contaminated with phenol by photochemical processes
The solar driven photo-Fenton process for treating water containing phenol as a contaminant has been evaluated by means of pilot-scale experiments with a parabolic trough solar reactor (PTR). The effects of Fe(II) (0.04-1.0 mmol L-1), H2O2 (7-270 mmol L-1), initial phenol concentration (100 and 500 mg C L-1), solar radiation, and operation mode (batch and fe
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12
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5. Multivariable predictive controller with excitation constraint for closed-loop identification. / Controlador preditivo multivariável com restrição de excitação para identificação de processos em malha fechada.
In MPC implementation, the process models development and definition is the most critical and time consuming task. Normally, the models are obtained through plant identification tests where perturbations are individually introduced in the manipulated variable while the controlled variable open-loop behavior is observed. For this reason, the application of cl
Publicado em: 2008
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6. Análise e desenvolvimento de controladores preditivos multivariáveis baseados em multi-modelos bilineares / Análise e desenvolvimento de controladores preditivos multivariáveis baseados em multi-modelos bilineares
This work addresses issues related to analysis and development of multivariable predictive controllers based on bilinear multi-models. Linear Generalized Predictive Control (GPC) monovariable and multivariable is shown, and highlighted its properties, key features and applications in industry. Bilinear GPC, the basis for the development of this thesis, is pr
Publicado em: 2008
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7. 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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8. Environmental education; perception environmental of different social group multivariable data analysis as instrument of support management watershed the Capituva watershed study, Macedônia, SP / Ações em educação ambiental; análise multivariada da percepção ambiental de diferentes grupos sociais como instrumentos de apoio a gestão de pequenas bacias - estudo de caso da microbacia do córrego da Capituva, Macedônia, SP
The main objective was oriented procedures in environmental education and to make perception environmental of different social group multivariable data analysis. This work was focused on field research, qualitative and quantitative research and, the Capituva watershed study. The methodology was divided into three stages: the exploratory choice and charact
Publicado em: 2005
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9. Tecnicas estatisticas multivariadas para o monitoramento de processos industriais continuos
In the industry of chemical processes, a lot of variabIes are manipulated and monitored at the same time. In these cases, it start to be of extreme importance the stages of data treatment and the deveIopment of models for representation of the processo One of the most important goals are detection and identification of faults in the processo Using multivaria
Publicado em: 2002
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10. Fisher's theorems for multivariable, time- and space-dependent systems, with applications in population genetics and chemical kinetics
We study different physical, chemical, or biological processes involving replication, transformation, and disappearance processes, as well as transport processes, and assume that the time and space dependence of the species densities are known. We derive two types of Fisher equations. The first type relates the average value of the time derivative of the rel
National Academy of Sciences.