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Roll Eccentricity Control for Strip Rolling Mills - ScienceDirect
1987.7.1 The strip exit thickness h, is given by: h =S(F,W) + (S-So) + e (1) where S(F,W) is the elastic deformation of the stand components, W is the strip width, S is the
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Online Monitoring System Design for Roll Eccentricity in Rolling Mills ...
2015.6.5 Abstract: This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can
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Active compensation of roll eccentricity in rolling mills IEEE ...
2002.8.6 Abstract: This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold
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An Online Algorithm for Roll Eccentricity Compensation
2019.5.2 Abstract. Because of the roll eccentricity in backup rolls, the exit thickness deviates periodically. Each strip thickness defect on exit is related to a roll of the finishing
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Strip Thickness Control of Cold Rolling Mill with
2014.1.1 Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network. January
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Roll Eccentricity Signal Detection and Its Engineering
2022.9.5 The roll eccentricity can be observed in various rolling mills for plates and strips, and it is a dominant factor affecting the quality of finished strip steels in modern
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Roll eccentricity compensation based on anti-aliasing
2009.2.1 Roll eccentricity is an important factor causing thickness variations during hot strip rolling and might define the limit of strip thickness control accuracy. An improved
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Roll Eccentricity Control for Strip Rolling Mills - ScienceDirect
1987.7.1 Abstract. An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and
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Roll eccentricity extraction and compensation based on
To meet the high thickness accuracy requirements in cold-rolling processes, a roll eccentric-ity signal extraction method based on modified particle swarm optimization and wavelet
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Sensors Free Full-Text Roll Eccentricity Detection and
2023.8.14 Roll eccentricity disturbance is a high-frequency periodic change signal caused by the irregular shape of the roll and roll bearing, which is difficult to identify and
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ESTAD: Presentations on Hot and Cold Rolling
2015.5.1 Functional Enhancements to Improve the Rolling Process in Plate and Steckel Mills. Principal author: Dr. Matthias Kurz Paper number: 223. Since 2002, Primetals Technologies has commissioned more than
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Roll eccentricity compensation control for strip rolling mills
This study seeks to improve the strip thickness accuracy by adding filter and compensator in strip rolling mills. Based on wavelet packet de-noising theory, this paper designed a wavelet packet analyzer of roll eccentricity (WPARE) to eliminate noises and useless frequencies in rolling force signal. By combining WPARE with a compensator, the rolling force
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Strip Thickness Control of Cold Rolling Mill - IJIRSET
2020.11.30 KEYWORDS: Cold Rolling Mill; Thickness Control; Roll Eccentricity; Eccentricity Compensation 1. INTRODUCTION Rolling strip is widely used for automobile manufactur-ing, food packaging, household electric appliances, ma-chinery, light industry, instruments, communications, mil-itary affairs and other fields [1]. The design of a control
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Roll Eccentricity Signal Detection and Its Engineering
2022.9.5 The roll eccentricity can be observed in various rolling mills for plates and strips, and it is a dominant factor affecting the quality of finished strip steels in modern high- precision and high-speed cold-rolling strip steel production.
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Active compensation of roll eccentricity in rolling mills IEEE ...
2002.8.6 This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances
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Neural network for identification of roll eccentricity in rolling mills
1996.6.15 The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.
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Online Monitoring System Design for Roll Eccentricity in Rolling Mills ...
2015.6.5 This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness deviation and product quality degradation, and a conventional control strategy cannot regulate this kind of periodic disturbances due to its complex characteristics. For the
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Active compensation of roll eccentricity in rolling mills
2000.4.1 As a matter of fact, roll eccentricity commonly exists in a strip rolling process, generally caused by inexact rolls grinding, non-uniform thermal expansion of rolls, ovality of working rolls or ...
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ROLL ECCENTRICITY EXPERT - Primetals Technologies
2021.4.6 Rolls in rolling mills are never completely round but have eccentricity which can be caused by: • grinding inaccuracy • non-uniform thermal expansion • asymmetrical adjustment of bearing rolls shell via drive keys Each eccentricity consists of a base frequency which is the rotary frequency of the roll and several harmonic frequencies.
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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1
Index Terms — Rolling mills, roll eccentricity, strip qual-ity monitoring, performance indicator, adaptive system. I. INTRODUCTION THE hot/cold rolling process is a high speed, transient,
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An Online Algorithm for Roll Eccentricity Compensation
2019.5.2 contribution thickness for a six-stand hot rolling mill range from 25 to 50 μm. Roll eccentricity may be caused by inexact roll grinding and non-uniform thermal expansion both leading to axial deviations between roll barrel and roll necks [7-8]. ... the relationship between roll eccentricity and rolling force variation [11]. The FFT
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Roll Eccentricity Expert
Elimination of a known strip thickness quality disturbance from rolls. Improved strip quality, improved thickness tolerances also at high rolling speeds. Maintenance-friendly: uses existing thickness, roll load, or strip tension measurements as feedback for control, hence: easy to implement in existing basic automation environments.
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Advanced Control for the Compensation of Roll and Coiler
The Roll Eccentricity Compensator RECO and the Coiler Oscillation COntrol COCO are designed, with some modifications, on the observer principle of control theory. Only input signals from measurements commonly available in rolling mills are employed. Results are given from an integration test, with RECO being implemented by means of a ...
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A roll eccentricity sensor for steel-strip rolling mills IEEE ...
The problem of roll eccentricity compensation in steel-strip rolling mills is examined. A novel roll eccentricity sensor is proposed for the task of retrieving the desired reference signal from the available roll-force measurement. The sensor implements a modified comb filter structure which can be arranged in either tunable or adaptive form. Simulation results
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Active compensation of roll eccentricity in rolling mills IEEE ...
This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, e.g., inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances
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A Robust Data-Driven Fault Detection Approach for Rolling Mills
2019.10.4 This brief proposes a robust subspace-aided fault detection approach for rolling mill processes with roll eccentricity. The novelty of this brief relies on the closed-loop identification of the so-called data-driven realization of the stable kernel representation (SKR) of the rolling mill process. In order to ensure an accurate and robust closed-loop
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A Robust Data-Driven Fault Detection Approach for Rolling Mills
Request PDF On Oct 4, 2019, Hao Luo and others published A Robust Data-Driven Fault Detection Approach for Rolling Mills With Unknown Roll Eccentricity Find, read and cite all the research you ...
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An Improved Strip Thickness Controller for a Rolling Mill
1984.7.1 Abstract. This paper describes an improved controller design for a conventional metal strip rolling mill with two work-rolls supported by larger diameter backup-rolls. The strategy is based on a model which represents the effects of backup-roll eccentricity, the plastic deformation process and elastic strains in the mill stand
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Strip Thickness Control of Cold Rolling Mill with Roll
2014.1.13 have been widely utilized in steel rolling mills [3]. Strip products thickness precision is an important quality parameter. But the export thickness appears as the periodical fluctuation in the practical production because of the roll eccentricity thermal expansion of rolls and the . fluctuation of the entrance thickness and material stiff-ness.
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Roll eccentricity compensation based on anti-aliasing
2009.2.1 Roll eccentricity is an important factor causing thickness variations during hot strip rolling and might define the limit of strip thickness control accuracy. An improved multi-resolution wavelet transform algorithm was proposed to compensate for the roll eccentricity. The wavelet transform method had good localization characteristics in both
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A roll eccentricity sensor for steel-strip rolling mills - IEEE ...
Abstract: The problem of roll eccentricity compensation in steel-strip rolling mills is examined. A novel roll eccentricity sensor is proposed for the task of retrieving the desired reference signal from the available roll-force measurement. The sensor implements a modified comb filter structure which can be arranged in either tunable or ...
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Roll eccentricity extraction and compensation
2022.2.25 To meet the high thickness accuracy requirements in cold-rolling processes, a roll eccentricity signal extraction method based on modified particle swarm optimization and wavelet threshold denoising
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Self-Tuning Regulator for Roll Eccentricity of Cold Tandem Mills
1983.1.1 Automatica, 12., 457-476. 602 C. Zhen-Yu and T. Wei-Guo + scre',o/down APC feedback feedforward-l regulatting regulatting thickness meter L 10ad cell Fig. 1 The conventional regulatting system of first stand inital value detector Fig. 2 The self-tuning regulatting system for roll eccentricity F Fig. 3 The rolling force fluctuation of backup ...
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Active compensation of roll eccentricity in rolling mills IEEE ...
Abstract: This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, e.g., inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances
Read More
H∞ Control system for tandem cold mills with roll eccentricity
2004.1.1 H∞ Control system for tandem cold mills with roll eccentricity. January 2004. Journal of Mechanical Science and Technology 18 (1):45-54. DOI: 10.1007/BF03028789. Authors: Seung Soo Kim. Jong ...
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Polynomial LQG control of back-up-roll eccentricity gauge variations in ...
1994.6.1 ROLLING MILL SIMULATION STUDIES The key advantage possessed by an LQG solution is that it is eminently suitable for control problems with complex stochastic disturbances as in the mitigation of Back-Up-Roll eccentricity effects. ... Roll eccentricity control for strip rolling mills: special ease study paper, lOth IFAC World Congress, 2, 661
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Roll Eccentricity Compensation Based on Anti-Aliasing
2009.3.1 This guarantees the validity of the reconstructed sub-signals. This anti-aliasing multi-resolution wavelet method is valid to compensate for roll eccentricity and is superior to ordinary [6J [7J [8J Aistleitner K, Mattersdorfer L G, Haas W, et al. Neural Network for Identification of Roll Eccentricity in Rolling Mills [J].
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AN LPV APPROACH FOR ACTIVE ROLL ECCENTRICITY
2002.1.1 Active Compensation of Roll Eccentricity in Rolling Transactions in Industrial Mills, IEEE Applications, Vol. 36, No. 2, pp. 625-632. Kugi A,, R. Novak and K. Schlacher (2000). ... CONCLUSIONS In this work a new technique based on LPV concepts has been proposed to compensate roll eccentricity in rolling mills. The main assumption is that the ...
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Roll Eccentricity Control by Using a Bandpass Filter
2001.9.1 Thickness deviations of the steel plates in the rolling mill process is mainly caused by the roll eccentricity of the back up roll (BUR). In this paper, a bandpass filter with high gain in the given frequency is introduced which is able to overcome the roll eccentricity of BUR and is very simple compared with other roll eccentricity control (REC) methods.
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The Complete Technology Book on Hot Rolling of Steel
The hot rolling technology is the most widely used method of shaping metals and is particularly important in the manufacture of steel for use in construction and other industries. In metalworking, rolling is a metal forming process in which metal stock is passed through a pair of rolls. Rolling is classified according to the temperature of the ...
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