1384384

11167

Sheet and ®lm processes, which include papermaking, polymer ®lm extrusion, and adhesive coating, are of substantial industrial importance. The processes are poorly conditioned and truly large scale, with up to hundreds of manipulated variables and thou- sands of sensor locations. The uncertainties in sheet and ®lm process models require that they be explicitly taken into account during the control design procedure. Numerically ecient algorithms are developed that provide robust optimal controllers for a wide variety of uncertainty descriptions. The robust optimality of the controllers can be relaxed to provide low order controllers suitable for real time implementation. Robust controllers are designed for a simulated paper machine, based on a realistic descrip- tion of the interactions across the machine, and the level of model inaccuracies.

149

papermaking , Robust control , Sheet and ®lm processes , Cross-directional control , Large scale systems , Polymer ®lm extrusion

Studia Iranica

177

177