Sheet and film processes, which include papermaking, polymer film 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 thousands of sensor
locations. The uncertainties in sheet and film process models require that they be explicitly
taken into account during the control design procedure. Numerically efficient algorithms are
developed that provide robust optimal controllers for a wide variety of uncertainty …