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Now showing items 21-30 of 38
Estimating modulus of elasticity, torque loss, and tension using an Extended Kalman Filter
(Oklahoma State University, 1999-06)
A set of sub-optimal Extended Kalman Filters (EKF's) are described. The filters are used to estimate web tension, modulus of elasticity, and loss torque for all sections in a small web processing line located at Rockwell ...
Permanent out-of-plane distortions of paper printed in heat-set web offset
(Oklahoma State University, 1999-06)
Paper, a flat material, frequently with a coated surface, is made out of fibres. In heat-set offset printing a permanent out-of-plane distortion, the so-called washboard effect, occurs quite frequently, which is clearly ...
Influence of web warpage on the lateral dynamics of webs
(Oklahoma State University, 1999-06)
The transport of long flexible webs is of great importance in many manufacturing applications, including the processing of paper, textiles, magnetic tapes and photographic film. Beginning with the pioneering work of Shelton ...
Understanding friction
(Oklahoma State University, 1999-06)
Friction plays a critical role in many web handling and winding problems in the paper industry. Although these problems can often be reduced to simple mechanical models, the models require the coefficient of friction of ...
Tension control with and without tension sensors
(Oklahoma State University, 1999-06)
State feedback has become a widely used method of controlling dynamic systems such as moving webs. In a state controller the present value of all states (i.e. tension, motor speed, and motor torque for each web span) are ...
Engineering paper tubes to improve winding performance of various materials
(Oklahoma State University, 1999-06)
Over the past 10 years, Sonoco has conducted fundamental, solid mechanics research concerning structural behavior of spirally wound paper tubes. The scope of this program has included experimental, numerical, and analytical ...
Dynamic model for monitoring and control of a winding process
(Oklahoma State University, 1999-06)
In this paper, a dynamical model for an on-line monitoring and control strategy design is proposed. It describes the dynamic behaviour of in-roll stresses as the roll is being built. The distribution of in-roll stresses ...
Resiliency of an air-floated web
(Oklahoma State University, 1999-06)
Air-flotation ovens are used for non-contact drying of coated web materials such as photographic film, magnetic media, and paper. In a typical air-flotation oven, the air bars are arranged in such a way that the path of ...
Wrinkling of webs due to twist
(Oklahoma State University, 1999-06)
Webs are often required to endure twisting in web process machinery. There is a limit to the degree to which the web can be twisted prior to wrinkling. The objective of this publication is to document a closed form technique ...
Mechanics of non-uniform webs
(Oklahoma State University, 1999-06)
This paper lays the groundwork in an effort to determine appropriate boundary conditions and basic principles that can be used to extend current web mechanics models to include webs that are not "initially straight and ...