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Multivariable controller design for hot rolling mill

Pedersen, Lars Malcolm and Wittenmark, Björn LU (1998) In IEEE Trans. on Control Systems Technology 6. p.304-312
Abstract
This paper describes a controller design for a hot rolling mill. The main purpose of the algorithm is to improve the control of the cross-width thickness profile of the plates. This is obtained by designing a controller which makes independent thickness control possible at the two sides of the rolling mill. This is obtained by first linearizing the positioning systems using feedback linearization and then using linear quadratic eigenspace design on the linearized multivariable system. Integral control is included to ensure zero stationary thickness error. The design is done using derived dynamical multivariabl models. To ensure that the design is stable, the stability of the system is investigated using the small gain theorem. The... (More)
This paper describes a controller design for a hot rolling mill. The main purpose of the algorithm is to improve the control of the cross-width thickness profile of the plates. This is obtained by designing a controller which makes independent thickness control possible at the two sides of the rolling mill. This is obtained by first linearizing the positioning systems using feedback linearization and then using linear quadratic eigenspace design on the linearized multivariable system. Integral control is included to ensure zero stationary thickness error. The design is done using derived dynamical multivariabl models. To ensure that the design is stable, the stability of the system is investigated using the small gain theorem. The performance of the controller is evaluated using models estimated from data from the hot plate mill at The Danish Steel Works Ltd. (Less)
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Contribution to journal
publication status
published
subject
keywords
Metals industry, Hydraulic systems, Nonlinear systems, Linear-quadratic control, Eigenstructure assignment, Stability, Multivariable systems
in
IEEE Trans. on Control Systems Technology
volume
6
pages
304 - 312
language
English
LU publication?
yes
id
dde2a163-721b-4bc3-9b0b-bebe190fd927 (old id 4780129)
date added to LUP
2014-11-23 11:24:04
date last changed
2016-09-28 15:12:11
@misc{dde2a163-721b-4bc3-9b0b-bebe190fd927,
  abstract     = {This paper describes a controller design for a hot rolling mill. The main purpose of the algorithm is to improve the control of the cross-width thickness profile of the plates. This is obtained by designing a controller which makes independent thickness control possible at the two sides of the rolling mill. This is obtained by first linearizing the positioning systems using feedback linearization and then using linear quadratic eigenspace design on the linearized multivariable system. Integral control is included to ensure zero stationary thickness error. The design is done using derived dynamical multivariabl models. To ensure that the design is stable, the stability of the system is investigated using the small gain theorem. The performance of the controller is evaluated using models estimated from data from the hot plate mill at The Danish Steel Works Ltd.},
  author       = {Pedersen, Lars Malcolm and Wittenmark, Björn},
  keyword      = {Metals industry,Hydraulic systems,Nonlinear systems,Linear-quadratic control,Eigenstructure assignment,Stability,Multivariable systems},
  language     = {eng},
  pages        = {304--312},
  series       = {IEEE Trans. on Control Systems Technology},
  title        = {Multivariable controller design for hot rolling mill},
  volume       = {6},
  year         = {1998},
}