Encontrados 4 documentos, a visualizar página 1 de 1
SiMoVA: Sistema de Monitorização de Variáveis Ambientais
Rui Matos; Luís Coimbra; J. P. Estima de Oliveira; Osvaldo Rocha PachecoThis paper describes an open and configurable system to perform continuous monitoring of environmental variables. The system is based on a client/ server architecture. The remote stations where built with PLCs (Programmable Logic Controllers) and the server is a PC, containing a software package developed in Labview (Virtual Laboratory Instrument Engineering Workbench) and run...
ICAP: Communication Interface for Programmable Automaton
Fernando J. F. C. de Sousa; Máximo A. S. de Oliveira; José Luis Azevedo; J. P. Estima de OliveiraThis work presents a software tool, developed for a personal computer, that can replace the programming console of a programmable logic controller (PLC).To the user, the tool appears as a graphic interface underthe Windows environment. ; Apresenta-se neste trabalho uma ferramenta de software, desenvolvida para computador pessoal, que substitui a consola de programação de um au...
Hybrid models of hydraulic systems for hardware-in-the-loop simulation. Part 1:...
J. A. Ferreira; F. Gomes Almeida; M. R. Quintas; J. P. Estima de OliveiraPhysical modelling of hydraulic systems results in systems of differential and algebraic equations (DAEs) that are normally stiff. This is because they often include multiple temporal scales and present complex and non-linear behaviour. The simulation of these stiff DAEs in real time demands small time steps, in order to achieve algorithm stability, because explicit fixed step solvers are usually applied. Model...
Hybrid models of hydraulic systems for hardware-in-the-loop simulation. Part 2:...
J. A. Ferreira; F. Gomes Almeida; M. R. Quintas; J. P. Estima de OliveiraThe use of new control schemes for hydraulic systems has been the object of study during the last few years. A simulated environment is the cheapest and fastest way of evaluating the relative merits of different control schemes for a given application. Real-time simulation allows parametrization and test of the performance of real controllers. This paper describes the set-up of a real-time simulation platform t...
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