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Now showing items 11-20 of 31
Adaptive feedforward based control strategy for attenuation of periodic tension oscillations in roll-to-roll manufacturing
(Oklahoma State University, 2013-06)
Considering the aforementioned issues, an adaptive feedforward (AFF) algorithm that can work in parallel to an existing feedback control systems is developed for control of web tension and to attenuate periodic oscillations. ...
Comparison of control strategies for roll-to-roll printing presses
(Oklahoma State University, 2013-06)
Flexible printed electronics is touted to be a significant part of the future of the roll-to-roll (R2R) printing industry. Electronic devices, such as RFID tags, low-cost displays and lighting devices, polymer solar cells, ...
Web wrinkling resulting from moment transfer
(Oklahoma State University, 2013-06)
Considerable research has been focused on the impact of roller misalignment on web instability. Early work focused on the prediction of trough instabilities in the entering span, just upstream of the misaligned roller [1]. ...
Behavior of webs transiting crowned rollers
(Oklahoma State University, 2013-06)
Crowned rollers are known to center running belts by observation. Crown can be an unintentional artifact of rollers whose surfaces are machined on lathes while supported at their ends. The bending stiffness of the rotating ...
Wireless monitoring of internal wound roll pressures
(Oklahoma State University, 2013-06)
Winding is a dynamic process. The final roll is the product of all that happens during the winding process from roll start to final cutoff. Nearly all roll measurement methods try to characterize a roll's structure after ...
Evaluating the impact of non-uniform paper properties on web lateral instability on printing presses
(Oklahoma State University, 2013-06)
Lateral instability of the paper web during printing may lead to several quality issues such as print misregistration, wrinkles, tracking issues, etc. The problem often leads to paper rejects and claims from printers. There ...
On the governing equation for web tension with out-of-round rolls
(Oklahoma State University, 2013-06)
In roll-to-roll (R2R) manufacturing the presence of non-ideal elements, such as out-of-round or eccentric rolls, induces periodical oscillations in the web tension signal. Model simulations based on ideal elements do not ...
Lateral dynamics simulation of webs having cross-machine direction variation
(Oklahoma State University, 2013-06)
Webs often include sectional variation in caliper or modulus of elasticity as a result of undesirable manufacturing variation or by intentional design. These variations influence wrinkle formation and tracking control in ...
Influence of heating on tensile and relaxation behavior of wet paper
(Oklahoma State University, 2013-06)
The influence of increasing temperature on the strength and relaxation of wet never-dried paper was studied using C-IMPACT, a tensile tester equipped with a special heating chamber. The heating device formed a small climate ...
Application of dimensional analysis to roll-to-roll manufacturing systems
(Oklahoma State University, 2013-06)
In this paper, we investigate the application of dimensional analysis for R2R systems. First, dimensional form of governing equations for web tension and speed are transformed to non-dimensional form using dimensional ...