Hydraulic Valve
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Dimensional design of the barometric leg of a flotation column: a key to operational stability
Abstract The inefficiency in controlling the slurry/froth interface level of a scavenger column flotation stage was severely impairing the process performance of an iron mining company, increasing the iron content in the tailings to levels above 20% and, consequently, not meeting the company's iron recovery and pellet feed production targets. Based on mass b
REM, Int. Eng. J.. Publicado em: 2020-03
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2. Numerical study of upstream disturbances on the performance of electromagnetic and ultrasonic flowmeters
ABSTRACT Electromagnetic and ultrasonic flowmeters are high precision devices that can measure the water flow in pressurized irrigation networks. In these networks, the inadequate installation distance of flow control valves generates upstream disturbances which will increase measurement errors and reduce the accuracy of the equipment. Therefore, estimating
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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3. Desenvolvimento de um regulador de pressão microprocessado / Development of a microprocessed pressure regulator
Dentre os fatores que afetam a uniformidade de aplicação de água, cita-se a variação de pressão no sistema, causada principalmente pela topografia do terreno e pela inexistência ou operação inadequada de reguladores de pressão. Nesse sentido, têm-se empregado válvulas reguladoras de pressão nos projetos de irrigação com variações topográfic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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4. Análise e comparação entre a resposta teórica e a resposta de um software no posicionamento de um cilindro através de uma válvula proporcional / Analysis and comparison between the theoretical response and the response from a software in the positioning of a cylinder through a proportional valve
Este trabalho aborda o estudo do grau de fidelidade de um pacote de simulação de sistemas automatizados (Automation Studio), em comparação com as previsões teóricas correspondentes, quando solicitado a simular o comportamento de um sistema de teste, composto de um servoposicionador hidráulico acoplado a uma carga. O modelo matemático do sistema de te
Publicado em: 2011
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5. MODELAGEM COMPUTACIONAL DA VÃLVULA ANTECIPADORA DE ONDA COMO MECANISMO DE ALÃVIO PARA O GOLPE DE ARÃETE / COMPUTATIONAL MODELING OF ANTICIPATION VALVE OF WAVE AS A MECHANISM OF RELIEF FOR WATER HAMMER
Neste trabalho foram realizadas simulaÃÃes do transiente hidrÃulico com vÃlvula antecipadora de onda com abertura e fechamento completo e nÃo instantÃneo, como mecanismo de alÃvio para o golpe de arÃete. A vÃlvula deve situar-se prÃximo ao conjunto motor-bomba. Assim, a vÃlvula antecipadora serà aplicada ao segundo nà das adutoras consideradas,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/05/2010
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6. A fly-by-wire rudder control system design using multiobjective optimization.
This work aims to demonstrate an approach to design a fly-by-wire mobile surface control system for a commercial jet employing multiobjective optimization techniques. This approach consists on sizing a set of design parameters of the control system based on model simulation and response analysis coupled with optimization algorithms in a multiobjective design
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/03/2009
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7. Real-time optimization of water supply system operation / Otimização energética em tempo real da operação de sistemas de abastecimento de água
This work presents a computational model for real-time optimization of water-distribution networks operation. An integrated software tool has been developed which is composed of three main modules: (i) a hydraulic simulator that performs the extended period simulation of the system (EPANET); (ii) a short-term demand-forecasting model, based on the moving Fou
Publicado em: 2009
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8. CONTROLE POR APRENDIZADO DE SISTEMAS SERVO: HIDRÁULICOS DE ALTA FREQÜÊNCIA / LEARNING CONTROL OF HIGH FREQUENCY SERVO: HYDRAULIC SYSTEMS
Hydraulic systems are used where relatively high forces and torques are required, or when high response speeds are necessary. They are used in industrial systems, robotics, movement simulators, automated plants, ore exploration, presses, and especially in fatigue testing systems. Fatigue tests are usually performed on servo-hydraulic systems, in order to pre
Publicado em: 2008
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9. FLUID LINES MODELS FOR TRANSIENTS ANALYSIS AND SIMULATION USING THE POWER FLOW / MODELOS DE LINHAS FLUIDAS ATRAVÉS DO FLUXO DE POTÊNCIA PARA ANÁLISE E SIMULAÇÃO DE TRANSIENTES
The study of transitory phenomena in hydraulic systems is present in several branches of the engineering, in the hydroelectric power stations area and in the petroleum industry. The present work introduce a comparative analysis of this phenomenon using three approaches of distinct modeling: the classic characteristics method, the technique of bond graphs and
Publicado em: 2007
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10. ConstruÃÃo de uma bancada de ensaio para avaliaÃÃo de mecanismos dosadores de sementes / Construction of a workbench of essay for evaluation of mechanisms distributor of seeds
The current work aimed the construction of a benches group for simulating displacement speeds of sowers. The speeds simulator was performed and was carried out in the mechanical trials laboratory located at UTFPR - campus Medianeira, and the assays of systemÂs evaluation were performed at the Agricultural Engineering Experimental Nucleous - AEEN, which belo
Publicado em: 2006
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11. Operação otimizada do sistema adutor metropolitano utilizando algoritmos genéticos: estudo de caso - SAM Leste da Região Metropolitana de São Paulo (R.M.S.P.). / Optimized operation of metropolitan mains system using genetic algorithms: case study - East Metropolitan Mains System of Metropolitan Region of São Paulo (M.R.S.P.).
This work presentss an evaluation of optimization of real time operation of a complex water supply system. Genetic Algorithm associated with a SCADA system and a network hydraulic simulation model was applied. Observed historic consumptions were used as a perfect water demand forecast model. Case study is the optimization of a multiobjective function (energy
Publicado em: 2005
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12. Modeling and identification of a fly-by-wire control system.
This work investigates the system identification and modeling techniques applied to a fly-by-wire system for pitch control of a commercial jet aircraft. The objective of the work is to build a model based on system identification techniques and generic modeling of the system, therefore using the "grey box" approach. The identification data was obtained from
Publicado em: 2005