%0 Report %9 Technical Report %A Bemporad, Alberto %A Bernardini, Daniele %A Cuzzola, Francesco Alessandro %A Spinelli, Andrea %D 2007 %F eprints:1007 %I University of Siena %N 4 %T Optimization-based feedback control of flatness in a cold tandem rolling %U http://eprints.imtlucca.it/1007/ %X For the problem of feedback control of flatness in a cold tandem rolling this paper proposes control techniques based on quadratic optimization. Three different strategies are proposed and compared: a centralized solution based on a global QP problem that decides the commands to all the actuators, and two decentralized solutions where each actuator command is optimized locally. All schemes are based on a global exchange of information about the commands generated at the previous time step at each stand, required by a synchronizing device that compensates for the numerous delays present in the mill. %Z Technical Report No. 2007-4