Abstract
In the latest type of rotogravure printing presses referred to as the sectional drive system, wherein each gravure cylinder is driven by an individual motor, tension fluctuations by an upstream register control generate register errors in downstream units. Hence, the introduction of new effective control system to prevent the generation of the downstream register errors is required. For this purpose, in this paper, a method of register control for printing presses has been proposed. First, a nonlinear coordinate transformation for the state variable of the printing press dynamics is proposed. Subsequently, based on the new coordinate system, a nonlinear control method is designed using the Lyapunov stability. Finally, the performance of the new control method is demonstrated by simulation and experimental results and comparing with a conventional PD control method.
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