Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Modeling and Control of Tandem Cold Rolling Mills
Submission Author:
Alexandre Leoni , RJ , Brazil
Co-Authors:
José Adilson Castro, Péricles Alves, Alexandre Leoni
Presenter: Alexandre Leoni
doi://10.26678/ABCM.COBEM2017.COB17-0196
Abstract
The tandem cold rolling of metal strip is a complex, nonlinear multivariable process where the variables of each stand interact with each other, turning its control an engineering challenge. From the classic modeling base of the process, this study applies modern control techniques to improve the precision of the strip thickness control in an actual operation. The mathematical model was linearized for an effective use of the state space model and the process control was done using LQG (linear quadratic Gaussian control. Calculations and simulations were carried out using Matlab/Simulink and the results were compared with previous studies. After the first tests it was verified the need of the introduction of integral action for the exit strip thickness. The control model presented low values for overshoot, settling time and near null steady state error.
Keywords
tandem rolling, mathematical modeling, linearization, state space model, LQG control
