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Multivariable controller design for hot rolling mill

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Author

Summary, in English

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.

Publishing year

1998

Language

English

Pages

304-312

Publication/Series

IEEE Trans. on Control Systems Technology

Volume

6

Issue

2

Document type

Journal article

Topic

  • Control Engineering

Keywords

  • Metals industry
  • Hydraulic systems
  • Nonlinear systems
  • Linear-quadratic control
  • Eigenstructure assignment
  • Stability
  • Multivariable systems

Status

Published