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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Uma arquitetura para sistemas supervis?rios industriais e sua aplica??o em processos de eleva??o artificial de petr?leo

Souza, Rodrigo Barbosa de 04 February 2005 (has links)
Made available in DSpace on 2014-12-17T14:56:06Z (GMT). No. of bitstreams: 1 RodrigoBS.pdf: 821976 bytes, checksum: 45f7062b292e641f0f7e595b2b356d60 (MD5) Previous issue date: 2005-02-04 / Petr?leo Brasileiro SA - PETROBRAS / The using of supervision systems has become more and more essential in accessing, managing and obtaining data of industrial processes, because of constant and frequent developments in industrial automation. These supervisory systems (SCADA) have been widely used in many industrial environments to store process data and to control the processes in accordance with some adopted strategy. The SCADA s control hardware is the set of equipments that execute this work. The SCADA s supervision software accesses process data through the control hardware and shows them to the users. Currently, many industrial systems adopt supervision softwares developed by the same manufacturer of the control hardware. Usually, these softwares cannot be used with other equipments made by distinct manufacturers. This work proposes an approach for developing supervisory systems able to access process information through different control hardwares. An architecture for supervisory systems is first defined, in order to guarantee efficiency in communication and data exchange. Then, the architecture is applied in a supervisory system to monitor oil wells that use distinct control hardwares. The implementation was modeled and verified by using the formal method of the Petri networks. Finally, experimental results are presented to demonstrate the applicability of the proposed solution / A utiliza??o de sistemas de supervis?o tem se tornado cada vez mais essencial ao acesso, gerenciamento e obten??o de dados dos processos industriais, devido ao constante e frequente desenvolvimento da automa??o industrial. Estes sistemas supervis?rios (SCADA) t?m sido amplamente utilizados em diversos ambientes industriais para armazenar dados do processo e control?-lo de acordo com alguma estrat?gia adotada. O hardware de controle de um sistema SCADA ? o conjunto de equipamentos respons?veis pela execu??o desta tarefa. O software de supervis?o SCADA acessa os dados dos processos atrav?s do hardware de controle e torna-os dispon?veis para os usu?rios. Atualmente, muitos sistemas de automa??o industrial utilizam softwares de supervis?o desenvolvidos pelo mesmo fabricante do hardware de controle. Normalmente, estes softwares n?o podem ser usados com equipamentos de controle de outros fabricantes. Este trabalho prop?e uma metodologia de desenvolvimento de sistemas de supervis?o capaz de acessar informa??es dos processos atrav?s de diferentes equipamentos de controle. Inicialmente, defini-se uma arquitetura para sistemas supervis?rios que garanta comunica??o e troca de dados eficientes. Em seguida, a arquitetura ? aplicada em um sistema de supervis?o de po?os de petr?leo que utilizam diferentes equipamentos de controle. A implementa??o foi modelada utilizando o m?todo formal de redes de Petri. Os resultados s?o apresentados para demonstrar a aplicabilidade da solu??o proposta
12

Uživatelské rozhraní pro řízení technologií / User Interface for Technology Control

Zapletal, Filip January 2015 (has links)
This paper describes systems and user interfaces for monitoring and supervisory control of technological equipment. It describes basic approaches used to solve this problem, commonly used communication protocols and existing user interfaces. Based on those findings are defined requirements for design of a modern user interface for technology supervision and control, particularly in the area of clean and waste water distribution systems. The thesis concludes with a description of a user interface based on defined requirements and finally compares them with existing systems.
13

Supervisory systems in waste water treatment plants: sistematise their implementation

Cortés de la Fuente, Christian 17 December 2002 (has links)
La implantació de Sistemes de Suport a la presa de Decisions (SSD) en Estacions Depuradores d'Aigües Residuals Urbanes (EDAR) facilita l'aplicació de tècniques més eficients basades en el coneixement per a la gestió del procés, assegurant la qualitat de l'aigua de sortida tot minimitzant el cost ambiental de la seva explotació. Els sistemes basats en el coneixement es caracteritzen per la seva capacitat de treballar amb dominis molt poc estructurats, i gran part de la informació rellevant de tipus qualitatiu i/o incerta. Precisament aquests són els trets característics que es poden trobar en els sistemes biològics de depuració, i en conseqüència en una EDAR. No obstant, l'elevada complexitat dels SSD fa molt costós el seu disseny, desenvolupament i aplicació en planta real, pel que resulta determinant la generació d'un protocol que faciliti la seva exportació a EDARs de tecnologia similar. L'objectiu del present treball de Tesi és precisament el desenvolupament d'un protocol que faciliti l'exportació sistemàtica de SSD i l'aprofitament del coneixement del procés prèviament adquirit. El treball es desenvolupa en base al cas d'estudi resultant de l'exportació a l'EDAR Montornès del prototipus original de SSD implementat a l'EDAR Granollers. Aquest SSD integra dos tipus de sistemes basats en el coneixement, concretament els sistemes basats en regles (els quals són programes informàtics que emulen el raonament humà i la seva capacitat de solucionar problemes utilitzant les mateixes fonts d'informació) i els sistemes de raonament basats en casos (els quals són programes informàtics basats en el coneixement que volen solucionar les situacions anormals que pateix la planta en el moment actual mitjançant el record de l'acció efectuada en una situació passada similar).El treball està estructurat en diferents capítols, en el primer dels quals, el lector s'introdueix en el món dels sistemes de suport a la decisió i en el domini de la depuració d'aigües. Seguidament es fixen els objectius i es descriuen els materials i mètodes utilitzats. A continuació es presenta el prototipus de SSD desenvolupat per la EDAR Granollers. Una vegada el prototipus ha estat presentat es descriu el primer protocol plantejat pel mateix autor de la Tesi en el seu Treball de Recerca. A continuació es presenten els resultats obtinguts en l'aplicació pràctica del protocol per generar un nou SSD, per una planta depuradora diferent, partint del prototipus. L'aplicació pràctica del protocol permet l'evolució del mateix cap a un millor pla d'exportació.Finalment, es pot concloure que el nou protocol redueix el temps necessari per realitzar el procés d'exportació, tot i que el nombre de passos necessaris ha augmentat, la qual cosa significa que el nou protocol és més sistemàtic. / The decision support systems (DSS) implemented in wastewater treatment plants (WWTP) make easier the application of better techniques based on the knowledge to manage the process, insuring the effluent quality and minimising the economical costs of its exploitation. The knowledge-based systems are characterised by its capability of working in ill structured domains, and with relevant information of type qualitative or uncertain. These are the characteristics that could be found in the biological systems treatments, and consequently in a wastewater treatment plant. However, the high complexity of the DSS makes very expensive their design, development and the application in a real WWTP, and because this reason it is very important the generation of a protocol that makes easier the exportation of the program to other similar plants.The objective of the present document is the development of a protocol that makes easier the systematic exportation of DSS and the reuse of the process knowledge acquired previously. The document is developed in basis on the study case from the DSS exportation from the Granollers WWTP to Montornès WWTP. This knowledge-based system integrates two kinds of systems based on knowledge, concretely the rule-based systems (which are programs that simulate the human reasoning and its capability of problem solving using the same information sources) and the case-based reasoning systems (which are informatic programs based on knowledge that solve the current abnormal situations in the plant by means of retrieving the executed action in a similar past situation).The document is structured in different chapters, in the first chapter; the lector is introduced in the DSS domain and in the wastewater treatment domain. Afterwards the objectives are defined and the materials and methods used are explained. Following, the Granollers DSS prototype is presented. Once, the prototype is explained, the first protocol made by the author in his research work is presented. Afterwards, the results obtained from the protocol application to export the DSS to other plant are presented. The real application of the protocol allows making better itself. In conclusion, the new protocol reduces the needed time to make the exportation process, although the new protocol needs more steps to make the same work, this means that it is more systematic.

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