Many industrial processes involve the transportation of a continuous web of material over a series of rollers to obtain a finished product. The manufacture of polymer film is one such web transport process, which utilizes a series of rotating elements that act to manipulate the film. This paper develops a dynamic mathematical model of the “forward draw” in a polymer film production process. The model is capable of being implemented in real-time for control purposes, yet includes significant physical phenomena such as material damping. Experimental results from a pilot production plant are used to validate the model under steady-state and transient conditions. The model is then used as a basis for a feed-forward control scheme, which reduces speed variations in the forward draw by a factor of 8 and therefore improves considerably the film quality.
1.
Makin
, E.
, and Acarnley
, P.
, 2004, “Speed Estimation and Control in a Belt-Driven System for a Web Production Process. Part 1: System Modelling and Validation
,” Proc. Inst. Mech. Eng., Part E: J. Proc. Mech. Eng.
0954-4089, 218
(1
), pp. 15
–24
.2.
Reynolds
, O.
, 1874, “On the Efficiency of Belts or Straps as Communicators of Work
,” The Engineer
, 38
, p. 396
–397
.3.
Zahlan
, N.
, and Jones
, D. P.
, 1995, “Modeling Web Traction on Rollers
,” Proceedings of the Third International Conference on Web Handling ‘95
, Oklahoma State University, Stillwater, OK.4.
Johnson
, K. A.
, 1986, Contact Mechanics
, Cambridge University Press
, Cambridge, England
.5.
Shelton
, J. J.
, 1991, “Cause and Effects of Tension in a Draw-Controlled Web Process Line
,” Proceedings of the First International Conference on Web Handling ‘91
, Oklahoma State University, Stillwater, OK.6.
Walton
, B.
, and Rice
, B. S.
, 1997, “Web Longitudinal Dynamics
,” Proceedings of the Fourth International Conference on Web Handling
, Oklahoma State University, Stillwater, OK.7.
Koc
, H.
, Knittel
, D.
, de Mathelin
, M.
, and Abba
, G.
, 2000, “Robust Gain-Scheduled Control in Web Winding Systems
,” Decision and Control
, IEEE Control Systems Society
, Sydney, Australia
.8.
Angermann
, A.
, Joerg
, A.
, Patri
, Th.
, and Schroeder
, D.
, 2004, “Decentralized Self-Tuning Observers for Processing Plants With Continuous Moving Webs
,” IEEE Power Electronics Specialists Conference
, Vol. 6
, pp. 4591
–4594
.9.
Wolfermann
, W.
, 1995, “Tension Control of Webs—A Review of the Problems and Solutions in the Present and Future
,” Proceedings of the Third International Conference on Web Handling ‘95
,” Oklahoma State University, Stillwater, OK.10.
Liu
, W.
, and Davison
, E. J.
, 2003, “Servomechanism Controller Design of Web Handling Systems
,” IEEE Trans. Control Syst. Technol.
1063-6536, 11
(4
), pp. 555
–564
.11.
Lin
, K. C.
, 2003, “Observer-Based Tension Feedback Control With Friction and Inertial Compensation
,” IEEE Trans. Control Syst. Technol.
1063-6536, 11
(1
), pp. 109
–118
.12.
Shin
, K. -H.
, Jang
, J. -I.
, Kang
, H. -K.
, and Song
, S. -H.
, 2003, “Compensation Method for Tension Disturbance Due to an Unknown Roll Shape in a Web Transport System
,” IEEE Trans. Ind. Appl.
0093-9994, 39
(5
), pp. 1422
–1428
.13.
Pagilla
, P. R.
, Dwivedula
, R. V.
, Zhu
, Y.
, and Perera
, L. P.
, 2003, “Periodic Tension Disturbance Attenuation in Web Process Lines Using Active Dancers
,” ASME J. Dyn. Syst., Meas., Control
0022-0434, 125
(3
), pp. 361
–371
.14.
Makin
, E.
, and Acarnley
, P.
, 2004, “Speed Estimation and Control in a Belt-Driven System for a Web Production Process. Part 2: Control Strategy
,” Proc. Inst. Mech. Eng., Part E: J. Proc. Mech. Eng.
0954-4089, 218
(1
), pp. 25
–32
.15.
Shin
, K. H.
, Reid
, K. N.
, and Kwon
, S. O.
, 1995, “Non Interacting Tension Control in a Multi-Span Web Transport System
,” Web Handling
, Oklahoma State University
, Stillwater, OK
.16.
Wolfermann
, W.
, and Schroeder
, D.
, 1993, “New Decentralized Control in Processing Machines with Continuous Moving Webs
,” Web Handling
, Stillwater
, Stillwater, OK
.17.
Wolfermann
, W.
, 1999, “Compensation of Disturbances in the Web Force Caused by a Non-Circular Running Winder
,” Web Handling
, Stillwater
, Stillwater, OK
.18.
Xu
, Y.
, de Mathelin
, M.
, and Knittel
, D.
, 2002, “Adaptive Rejection of Eccentricity Tension Disturbances in Web Transport Systems
,” International Federation of Automatic Control
. Barcelona, Spain, Pergamon
, New York
.19.
Knittel
, D.
, Laroche
, E.
, and Koc
, H.
, 2001, “Tension Control for Winding Systems With Two Degrees of Freedom H~oo Controller
,” Industry Applications Conference; Conference Record of the 2001 IEEE Industry Applications Conference 36th IAS Annual Meeting
, IEEE
, Chicago, IL
.Copyright © 2010
by American Society of Mechanical Engineers
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