Modeling of continuous processing line with nonlinear model of the strip and control of material elongation

During processing in a technological process the processed material in form of a strip changes its technological properties. Maintaining the strip tensions within the specified and pre-set boundaries in sections among working cylinders along the processing line causes required elongation of the material which presents a key factor in achieving a good output product quality. The paper describes a model of multi-motor drive system of a continuous web-processing line enabling to control of the strip material elongation. It is based on design of a nonlinear mathematical model of the strip which allows simulating its elongation. We have focused ourselves on behavior of the line during steady-state with pre-set tensions in particular sections of the line and especially on control of elongation of the strip.