Active Vibration and Flatness Control of a Strip in a Continuous Galvanizing Line using Positive Position Feedback Control

Jung, Wonchul; Jang, Yu Jin; Lim, Seungho; Won, Sangchul

doi:10.2355/isijinternational.53.854

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…For this reason numerous examples show the successful use of a variety of methods that can be assigned to active damping by harmonic disturbance rejection. These include the application within mechatronic single-input single-ouput (SISO) systems, e.g., SMDSs [16]- [19], disk drives [20]- [22], gearboxes [23]- [25], and furthermore the control of power electronic devices [26], [27] or industrial processes [28]- [31].…”

Section: A State-of-the-art Techniquesmentioning

confidence: 99%

Data-Driven Adaptive Torque Oscillation Compensation for Multi-Motor Drive Systems

Brosch

Rauhaus

Wallscheid

et al. 2022

IEEE Open J. Ind. Applicat.

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Multi-motor drive systems (MMDS) combine several drives that work together to fulfill one task. Compared to conventional single-motor drive systems modular product concepts can be realized with MMDS thanks to additional degrees of freedom. Because of their mechanical structure consisting of several shafts, clutches, and gear pairings, complex deflection shapes arise which lead to unintended torque oscillations.To compensate for these torque oscillations a data-driven adaptive multiple-input single-output scheme based on two cascaded recursive least squares estimators is proposed. Here, weights (manipulable amplitudes) for each order (multiple of a fundamental frequency) to be compensated are multiplied with unit amplitude harmonic signals of a reference oscillator and added as reference torques to the torque controllers of the MMDS's drives. These weights are continually adapted by an online identification of transfer paths and disturbances. Furthermore, the torque contribution of the individual drives concerning the compensation task can be changed at runtime utilizing a weighting matrix as tuning parameter by analytically solving a quadratic program with a linear equality constraint. Hence, the proposed algorithm is suitable for automatic self-commissioning requiring only marginal expert intervention. Experimental investigations prove the compensation capability of the approach whereby a reduction of the output torque's total harmonic distortion (THD) of up to 80% from 26.8% to 5.4% for a representative operation point is achieved.

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Section: A State-of-the-art Techniquesmentioning

confidence: 99%

Data-Driven Adaptive Torque Oscillation Compensation for Multi-Motor Drive Systems

Brosch

Rauhaus

Wallscheid

et al. 2022

IEEE Open J. Ind. Applicat.

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show abstract

“…Magnetic guideways that are capable of guiding a target in a noncontact manner, i.e., by utilizing electromagnetic force, have been actively considered for the manufacturing process of a thin steel plate that particularly considers the deterioration of surface quality caused by contact with a roller. In some of the existing techniques, electromagnets are installed on the upper and lower surfaces of a steel plate to support continuous steel plates in a noncontact manner by utilizing an attractive force [1][2][3][4][5]; however, to the best of our knowledge, suppression of out-of-plane vibrations have not been reported. Furthermore, these studies on this subject considered only linearly transported continuous steel plates.…”

Section: Introductionmentioning

confidence: 99%

Noncontact Guide System for Traveling Continuous Steel Plate Using Electromagnet and Supplement of Permanent Magnets for Suppressing Vibration

et al. 2018

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In a plating process, the steel plate is conveyed 20-50 m in the vertical direction for drying, during which it is negligibly supported by rollers and other mechanisms. This produces plating without uniformity owing to the generation of vibration and other factors, which prevent the increase in productivity. We have developed a noncontact guide system for a high-speed traveling elastic steel plate in which electromagnetic forces are applied by actuators at the edges of the plate to control the plate's position. In this study, we investigated the vibration phenomenon when changing the steady current value of the electromagnet used for controlling the position. In addition, we conducted mode analysis of the steel plate to enable stable control even at low steady current values and verified whether stable guide can be provided by using it together with a permanent magnet. As a result, by arranging the permanent magnets, stable guidance was possible even at a low steady current value. In addition, it became clear that vibration damping performance is also improved.

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“…Here, the strip would be more accurately modeled as a plate rather than a beam, cf., e .g. [7], where the strip is modeled as a plate considering purely elastic deformation only. However, based on the state of elasto-plastic deformation calculated with the beam model and the material model (5) for plane stress, the tendency of the strip shape in lateral direction can be captured, cf.…”

Section: Maximum Crossbow After the Stabilization Rollmentioning

confidence: 99%

Elasto-plastic bending of steel strip in a hot-dip galvanizing line

et al. 2017

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A quasi-static model of axially moving steel strips in a continuous hot-dip galvanizing line is presented. The model provides the bending line of the strip and takes into account the history of elasto-plastic deformation. The numerical integration of the material model of elasto-plastic deformation is algorithmically separated from the solution of the boundary value problem of the bending line by pre-computing sets of onedimensional candidate relations between the strip curvature and the bending moment. Using this model, the influence of different roll positions in the zinc bath on the mean displacement of the strip at the gas wiping dies and the maximum lateral curvature of the strip (crossbow) can be efficiently calculated and analyzed.

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Active Vibration and Flatness Control of a Strip in a Continuous Galvanizing Line using Positive Position Feedback Control

Cited by 14 publications

References 10 publications

Data-Driven Adaptive Torque Oscillation Compensation for Multi-Motor Drive Systems

Data-Driven Adaptive Torque Oscillation Compensation for Multi-Motor Drive Systems

Noncontact Guide System for Traveling Continuous Steel Plate Using Electromagnet and Supplement of Permanent Magnets for Suppressing Vibration

Elasto-plastic bending of steel strip in a hot-dip galvanizing line

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