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master's thesis
UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA
Rijeka: University of Rijeka, Faculty of Engineering, 2016. urn:nbn:hr:190:814396
Pulić, Luka
University of Rijeka
Faculty of Engineering

Institutional repository: Repository of the University of Rijeka, Faculty of Engineering

Cite this document

Pulić, L. (2016). UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA (Master's thesis). Rijeka: University of Rijeka, Faculty of Engineering. Retrieved from https://urn.nsk.hr/urn:nbn:hr:190:814396

Pulić, Luka. "UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA." Master's thesis, University of Rijeka, Faculty of Engineering, 2016. https://urn.nsk.hr/urn:nbn:hr:190:814396

Pulić, Luka. "UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA." Master's thesis, University of Rijeka, Faculty of Engineering, 2016. https://urn.nsk.hr/urn:nbn:hr:190:814396

Pulić, L. (2016). 'UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA', Master's thesis, University of Rijeka, Faculty of Engineering, accessed 12 January 2025, https://urn.nsk.hr/urn:nbn:hr:190:814396

Pulić L. UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA [Master's thesis]. Rijeka: University of Rijeka, Faculty of Engineering; 2016 [cited 2025 January 12] Available at: https://urn.nsk.hr/urn:nbn:hr:190:814396

L. Pulić, "UPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA", Master's thesis, University of Rijeka, Faculty of Engineering, Rijeka, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:190:814396

Metadata
TitleUPRAVLJANJE SUSTAVOM VODE ZA HLAĐENJE ČELIKA U PROCESU KONTINUIRANOG LIJEVANJA
AuthorLuka Pulić
MentorNeven Bulić (mentor)
Committee memberLivio Šušnjić (predsjednik povjerenstva)
GranterUniversity of Rijeka
Faculty of Engineering
Rijeka
Defense date and country2016-09, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
Ovim diplomskim radom u cijelosti je predstavljen način rješavanja problema upravljanja sustavom vode za hlađenje čelika u procesu kontinuiranog lijevanja, od uvida u problem do implementacije upravljačkog programa u sustav. Navedeni problem, postavljen pred autora, primjer je stvarnog problema koji se pojavljuje u industrijskim postrojenjima, odnosno zadatak s kojim bi se budući inženjer mogao susresti tijekom radnog vijeka. U izradi diplomskog rada objedinjena su i iskorištena znanja stečena tijekom studija elektrotehnike, odnosno automatike pri čemu se poseban naglasak stavlja na sam proces automatizacije. Istovremeno, posebna se paţnja mora pridati i drugim granama elektrotehnike s kojima se autor susreo kroz svoje školovanje. U radu su korištena i pojašnjena znanja stečena na polju obrade analognih i digitalnih signala, sustava digitalnog upravljanja, automatizirane instrumentacije te mehatroničkih sustava. Tijekom izrade rada bilo je potrebno upoznati procese i sastavne dijelove ljevaonica čelika pa su oni također opisani u radu. Poseban naglasak stavljen je na implementaciju PID regulatora u upravljački program procesa. Da bi navedeni regulator bilo moguće implementirati u radno okruţje PLC-a, isti je bilo potrebno diskretizirati što je postignuto metodama opisanim u radu. Nakon diskretizacije i implementiranja u upravljački proces, a u cilju postizanja što bolje regulacije prilagođavani su parametri regulatora prema karakteristikama sustava kojim se upravlja. Prilagodba parametara regulatora pokazala je da je odabrani PID regulator dostatan za obavljanje i najsloţenijih zadaća unutar sustava. Prilikom prilagodbe parametara također se moglo uočiti da pojedinačna proporcionalna komponenta nije u mogućnosti dobro regulirati procese u sustavu već da je njezino djelovanje oscilatorne prirode. Sa ciljem ublažavanja navedenog djelovanja, dodana je integralna komponenta kojom se regulacija uglađuje, dok se derivacijskom komponentnom svojstva regulacije dodatno poboljšavaju. Uz detaljan opis implementacije PID regulatora, u radu je temeljito opisan i proces izrade upravljačkog programa i, programu adekvatnog, korisničkog sučelja u za to predviđenom programskom okruženju.
Abstract (english)
This thesis shows an all-around insight on the process of solving the problem based on the control of cooling water system in continuous steel casting process from the first encounter all the way to implementation of the solution into the system. The problem stated above is an example of the real-life problem that can occur in industrial facilities and, at the same time, an assignment that can be encountered by a future engineer in his work. To write this thesis all the knowledge learned through the years of studding electrical engineering, or more precisely automation, had to be used. Beside automation, the other fields of electrical engineering encountered during the making of this thesis were: analog and digital signal processing, digital controlling systems, automated instrumentation and mechatronics. At the same time, it was necessary to be introduced with the process of steel making and the parts of steel mills. The mayor emphasis was on PID implementation into the control program of the process. In order to implement the above stated regulator into the working environment of the PLC unit, it had to be discretizated. The discretization was accomplished by using the methods thoroughly described in this thesis. After the discretization and implementation into process were made, it was necessary to adjust the regulation parameters in order to achieve decent regulation characteristics. The adjustment had shown that the characteristics of used PID regulator were satisfying and that there was no need for more complex regulators. During the process of adjustment it was shown that the proportional regulator could not control the process well by itself. The nature of the regulation was oscillatory. To lower the oscillations caused by proportional regulator, integrator had to be introduced. In association with integration, proportional regulator gave smother regulation. The derivation regulation was added to make the control characteristics better. Along with the thorough description of the regulator implementation, this thesis describes the process of writing the control program and the graphic user interface in adequate programming environment.
Keywords
Languagecroatian
URN:NBNurn:nbn:hr:190:814396
Study programmeTitle: Electrical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike (magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2016-09-22 09:38:55