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Now showing items 11-20 of 22
Design of fixed structure controllers for web tension control
(Oklahoma State University, 2007-06)
It is a common practice in industry to design a Proportional-Integral (PI) velocity feedback controller cascaded with a PI outer tension loop to regulate web velocity and tension to their desired values. The controller ...
Behavior of a thin flexible twisted web
(Oklahoma State University, 2007-06)
In an earlier IWEB paper, "A New Method for Analyzing the Deformation and Lateral Translation of a Moving Web" [5], a nonlinear PDE model, suitable for use with low-cost FEA software, was developed. That work considered ...
Aerodynamic dancer in web handling
(Oklahoma State University, 2007-06)
This paper discusses the aerodynamic dancer that is effective in a wide range of frequency and do not cause excessive lateral web deflection, touching, or flutter. An aerodynamic model of air-turn bar has been developed. ...
Mechatronic damping for contact rolls in film winders
(Oklahoma State University, 2007-06)
The winding of a web is one of the most extensive and error-prone processes in web handling. All known solutions are limited in the range of properties and production parameters. To broaden the mentioned limits, a new ...
Web sag and the effect of camber on steering
(Oklahoma State University, 2007-06)
A web in a horizontal span will deflect downwards due to gravity. This sag is more pronounced for heavy materials in long spans under low tension. It is possible for a web whose unstretched length is greater than the span ...
Practice application and design of concave rollers
(Oklahoma State University, 2007-06)
A concave roller is an effective and inexpensive wrinkle-preventing roller design. By definition, a concave roller (a.k.a. a reverse-crowned roller) is a roller with a larger diameter at the edges than at its center. But ...
Applying hundreds of years of scientific and engineering knowledge in 50 years of time
(Oklahoma State University, 2007-06)
Aspects of lateral behavior discussed in this paper include (1) the concept of a web span as a tensioned beam, analyzed for large ratios of L/W, small ratios, and general ratios, and (2) static interaction of two spans and ...
Modeling wound rolls using explicit FE methods
(Oklahoma State University, 2007-06)
A new method of wound roll analysis using an explicit finite element formulation is presented in this paper. The stresses developed in center wound rolls with and without an undriven nip roller are discussed and compared ...
Modeling of laminated webs
(Oklahoma State University, 2007-06)
A dynamic model of the longitudinal behavior of a laminated web is developed. A single web model that takes into account both thermal and hygral strains is developed first from first principles; the model assumes heat ...
New method for measurement of wound-in-tension in webs wound into rolls
(Oklahoma State University, 2007-06)
The Wound-In-Tension (WIT) is the tension in the outermost layer of a winding roll. The Wound-In-Tension is an important parameter that controls the stresses inside the wound roll which in turn determines the quality of ...