Closed loop control of an electromagnetic stirrer in the continuous casting process

Dekemele, Kevin; Ionescu, Clara-Mihaela; Doncker, Michaël De; Keyser, Robin De

doi:10.1109/ecc.2016.7810264

Cited by 11 publications

(21 citation statements)

References 7 publications

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“…Each UDV sensor measures the velocity of small moving particles in GaInSn and returns the velocity profile along the horizontal ultrasound beam. The measurements were conducted using the DOP3000 which is able to operate 10 transducers [18]. The transmitters are activated sequentially and this cycle is repeated so that the flow in the left half region of the mold is visualized.…”

Section: Mini-limmcast Facilitymentioning

confidence: 99%

“…Currently, there is a very limited number of investigations on using real-time control of the electromagnetic actuators. To our knowledge there is only one paper published by Dekemele et al [18] where the authors use an electromagnetic stirrer to keep the meniscus flow within an optimum range. A static model and a dynamic model were identified using system identification.…”

Section: Electromagnetic Brakementioning

confidence: 99%

“…It is assumed that the force is damping the velocities. The placement of the electromagnetic brake is critical for the control design as it has been shown that small variations in the vertical position of the brakes can significantly change the effects of the brake on the flow [18]. For the experiments, the optimal position for the electromagnetic brake is chosen where the pole shoes are right below the SEN.…”

Section: Electromagnetic Brakementioning

confidence: 99%

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Flow Control Based on Feature Extraction in Continuous Casting Process

Abouelazayem

Glavinić

Wondrak

et al. 2020

Sensors

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The flow structure in the mold of a continuous steel caster has a significant impact on the quality of the final product. Conventional sensors used in industry are limited to measuring single variables such as the mold level. These measurements give very indirect information about the flow structure. For this reason, designing control loops to optimize the flow is a huge challenge. A solution for this is to apply non-invasive sensors such as tomographic sensors that are able to visualize the flow structure in the opaque liquid metal and obtain information about the flow structure in the mold. In this paper, ultrasound Doppler velocimetry (UDV) is used to obtain key features of the flow. The preprocessing of the UDV data and feature extraction techniques are described in detail. The extracted flow features are used as the basis for real time feedback control. The model predictive control (MPC) technique is applied, and the results show that the controller is able to achieve optimum flow structures in the mold. The two main actuators that are used by the controller are the electromagnetic brake and the stopper rod. The experiments included in this study were obtained from a laboratory model of a continuous caster located at the Helmholtz-Zentrum Dresden Rossendorf (HZDR).

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Section: Mini-limmcast Facilitymentioning

confidence: 99%

Section: Electromagnetic Brakementioning

confidence: 99%

Section: Electromagnetic Brakementioning

confidence: 99%

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Flow Control Based on Feature Extraction in Continuous Casting Process

Abouelazayem

Glavinić

Wondrak

et al. 2020

Sensors

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“…The next element represents the effect of a variation of the stopper position on the flow speed of the steel [31]. The electro-magnetic stirrer is used to change the speed of the flow of steel in order to maintain the speed within a certain interval.…”

Section: Case Study 1: Quality Control In Continuous Steel Castingmentioning

confidence: 99%

Simple Alternatives to PID-Type Control for Processes with Variable Time-Delay

2019

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Process industries include chemicals, petrochemicals, pulp and paper, steel, minerals, food, and power generation industries. Although diverse, all of these share common dynamics in terms of continuous variables and rely on the same measurements, e.g., level, flow, temperature, and pressure. They also have common actuators, such as valves and pumps. Additionally, they have variable time delays from process dynamics, such as mixing effects, measurement lines, or wireless data communication protocols. Processes with variable time delay can often lead to poor performance and instability. This paper proposes a fractional-order (FO) control design with adaptive laws for dealing with such processes, and a comparison is analysed against other controllers established in the literature for delayed dynamics. Two examples are presented to illustrate the advantages of the proposed approach. A real time-embedded control setup and interface to industrial standard devices is tested to illustrate the implementation aspects of the proposed fractional-order control. Comparison with other established controllers is given.

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“…An analysis of the literature shows that over the past decades, many proposals have been made to solve this problem [3,4,5]. Separately, it is worth highlighting those in which there is a direct effect on the value of the non-magnetic working gap.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Electromagnetic Stirrer Modernized by Using a Magnetodielectric Composite

Bolotin¹,

Smolyanov²,

Shvydkiy³

et al. 2017

Proceedings of the VIII International Scientific Colloquium "Modelling for Materials Processing"

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This paper presents the results of a study of the possibility of using a cermet composite based on Fe-Al2O3, as magnetodielectric inserts to increase the working gap between the inductor and the melt in the bottom electromagnetic stirrer with a rotating magnetic field. A three-dimensional model of a modernized laboratory facility for composite with a mass fraction of iron of 70% was studied. The model used previously measured electrical, thermal and magnetic physical parameters of composites. Numerical modeling of the problems of heat distribution in the modernized lining and the coupled electromagnetic-hydrodynamic-thermal problem of the temperature distribution in stirring molten metal was carried. A comparison of the results obtained for the standard and modernized stirrers has shown that the use of inserts is permissible in a limited range of values of the working gap.

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Closed loop control of an electromagnetic stirrer in the continuous casting process

Cited by 11 publications

References 7 publications

Flow Control Based on Feature Extraction in Continuous Casting Process

Flow Control Based on Feature Extraction in Continuous Casting Process

Simple Alternatives to PID-Type Control for Processes with Variable Time-Delay

Numerical Simulation of Electromagnetic Stirrer Modernized by Using a Magnetodielectric Composite

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