dc.contributor
dc.contributor.advisor
dc.contributor.author	Abouelazayem, Shereen
dc.contributor.other	Hlava Jaroslav, doc. Dr. Ing. Skolitel : 54948
dc.date.accessioned	2022-12-20T04:45:21Z
dc.date.available	2022-12-20T04:45:21Z
dc.date.committed	2018-7-31
dc.date.defense	2022-11-11
dc.date.submitted	2014-8-1
dc.date.updated	2022-11-28
dc.degree.level	Ph.D.
dc.description.abstract	Two-dimensional flow field measurement allows us to obtain detailed information about the processes inside the continuous casting mould. This is very important because the flow phenomena in the mould are complex, and they significantly affect the steel quality. For this reason, control based on two-dimensional flow monitoring has a great potential to achieve substantial improvement over the conventional continuous casting control. Two-dimensional flow field measurement provides large amounts of measurement data distributed within the whole cross-section of the mould. An experimental setup of the continuous casting process called Mini-LIMMCAST located in Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany, is used for this thesis. This thesis examines two alternatives of flow measurement sensors: Ultrasound Doppler Velocimetry (UDV) and Contactless Inductive Flow Tomography (CIFT). Both sensor variants can obtain information on the velocity profile in the mould. Two approaches were considered to create the process model needed for model-based control: a spatially discretized version of a model based on partial differential equations and computational fluid dynamics and a model obtained using system identification methods. In the end, system identification proved to be more fruitful for the aim of creating the model-based controller. Specific features of the flow were parametrized to obtain the needed controlled variables and outputs of identified models. These features are mainly related to the exiting jet angle and the meniscus velocity. The manipulated variables considered are electromagnetic brake current and stopper rod position. Model predictive control in several versions was used as the main control approach, and the results of simulation experiments demonstrate that the model predictive controller can control the flow and achieve the optimum flow structures in the mould using UDV. CIFT measurements can provide similar velocity profiles. However, further technical developments in the CIFT sensor signal processing, such as compensating for the effects of the strong and time-varying magnetic field of the electromagnetic brake on CIFT measurements, are necessary if this sensor is to be used for closed-loop control.	cs
dc.description.abstract	Two-dimensional flow field measurement allows us to obtain detailed information about the processes inside the continuous casting mould. This is very important because the flow phenomena in the mould are complex, and they significantly affect the steel quality. For this reason, control based on two-dimensional flow monitoring has a great potential to achieve substantial improvement over the conventional continuous casting control. Two-dimensional flow field measurement provides large amounts of measurement data distributed within the whole cross-section of the mould. An experimental setup of the continuous casting process called Mini-LIMMCAST located in Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany, is used for this thesis. This thesis examines two alternatives of flow measurement sensors: Ultrasound Doppler Velocimetry (UDV) and Contactless Inductive Flow Tomography (CIFT). Both sensor variants can obtain information on the velocity profile in the mould. Two approaches were considered to create the process model needed for model-based control: a spatially discretized version of a model based on partial differential equations and computational fluid dynamics and a model obtained using system identification methods. In the end, system identification proved to be more fruitful for the aim of creating the model-based controller. Specific features of the flow were parametrized to obtain the needed controlled variables and outputs of identified models. These features are mainly related to the exiting jet angle and the meniscus velocity. The manipulated variables considered are electromagnetic brake current and stopper rod position. Model predictive control in several versions was used as the main control approach, and the results of simulation experiments demonstrate that the model predictive controller can control the flow and achieve the optimum flow structures in the mould using UDV. CIFT measurements can provide similar velocity profiles. However, further technical developments in the CIFT sensor signal processing, such as compensating for the effects of the strong and time-varying magnetic field of the electromagnetic brake on CIFT measurements, are necessary if this sensor is to be used for closed-loop control.	en
dc.description.mark	S
dc.format	107
dc.format.extent	N/A
dc.identifier.signature	D 202200105
dc.identifier.uri	https://dspace.tul.cz/handle/15240/166881
dc.language.iso	an
dc.relation.isbasedon
dc.rights	Vysokoškolská závěrečná práce je autorské dílo chráněné dle zákona č. 121/2000 Sb., autorský zákon, ve znění pozdějších předpisů. Je možné pořizovat z něj na své náklady a pro svoji osobní potřebu výpisy, opisy a rozmnoženiny. Jeho využití musí být v souladu s autorským zákonem https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf a citační etikou https://knihovna.tul.cz/document/26	cs
dc.rights	A university thesis is a work protected by the Copyright Act. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one?s own expense. The use of thesis should be in compliance with the Copyright Act. https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf and the citation ethics https://knihovna.tul.cz/document/26	en
dc.rights.uri	https://knihovna.tul.cz/document/26
dc.rights.uri	https://www.mkcr.cz/assets/autorske-pravo/01-3982006.pdf
dc.subject	Continuous Casting	cs
dc.subject	Contactless Inductive Flow Tomography	cs
dc.subject	Industrial control	cs
dc.subject	Model Predictive Control	cs
dc.subject	Ultrasound Doppler Velocimetry	cs
dc.subject	Continuous Casting	en
dc.subject	Contactless Inductive Flow Tomography	en
dc.subject	Industrial control	en
dc.subject	Model Predictive Control	en
dc.subject	Ultrasound Doppler Velocimetry	en
dc.title	Control of Continuous Casting Process Based on Two-Dimensional Flow Field Measurements	cs
dc.title	Control of Continuous Casting Process Based on Two-Dimensional Flow Field Measurements	en
dc.type	disertační práce	cs
local.degree.abbreviation	Doktorský
local.degree.discipline	TK4
local.degree.programme	Elektrotechnika a informatika
local.degree.programmeabbreviation	P2612
local.department.abbreviation	NTI
local.faculty	Fakulta mechatroniky, informatiky a mezioborových studií	cs
local.faculty.abbreviation	FM
local.identifier.author	M17000225
local.identifier.stag	44502
local.identifier.verbis
local.identifier.verbis	a3a9424a-cd97-463c-bda0-58fc08d40bdd
local.note.administrators	automat
local.note.secrecy	Povoleno ZverejnitPraci Povoleno ZverejnitPosudky
local.poradovecislo	105

Control of Continuous Casting Process Based on Two-Dimensional Flow Field Measurements

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