Title :
A model for tension estimator in web-fed printing press
Author :
Wang, Yi ; Liu, Kai ; Zhang, Haiyan ; Cao, Congjun
Author_Institution :
Sch. of Mech. & Precision Instrum. Eng., X´´an Univ. of Technol., Xi´´an, China
Abstract :
In this paper, we introduced the tension variation in web-fed printing system and presented the model for tension estimation based on the Hooker´s Law and the theory of Dynamic Moment model. The coupling relations of tension and velocity in each tension zone of web-fed printing machine is analyzed and presented. Firstly, the model of tension estimation in unwinding units is proposed. It shows that the relationship between the tension and the velocity is nonlinear. Secondly, the model of tension estimation in printing units is proposed, and the condition of keeping tension constant is determined. Finally, the paper proposed a model for the distributions of tension and strain in winding roller, to solve the problem that the substrate is folded and the thickness of substrate is not uniform during the winding process. Tension estimation in such a process plays an important role for assuring both high product quality and safe process operation.
Keywords :
mechanical variables control; nonlinear control systems; printing machinery; process control; winding (process); Hooker´s Law; dynamic moment model; tension control; tension distributions; tension estimator; web-fed printing press system; winding process; winding roller; Angular velocity; Capacitive sensors; Equations; Instruments; Mathematical model; Nonlinear dynamical systems; Printing machinery; System testing; Torque; Velocity control; tension estimation; unwinding; web-fed printing press; winding;
Conference_Titel :
Test and Measurement, 2009. ICTM '09. International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-4699-5
DOI :
10.1109/ICTM.2009.5412928
