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Journal of Electronic Imaging

Two-dimensional control systems: learning from implementations
Author(s): Stephen R. Duncan
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Paper Abstract

The design of sensing and control systems for twodimensional industrial processes such as paper making, plastic film extrusion and metal rolling, has drawn extensively upon concepts from two-dimensional signal processing and image processing. The performance of two-dimensional control systems is discussed in terms of spatial and dynamic bandwidths and is illustrated by examples from the control of cross-directional variations on a plastic film extrusion line. By relating these bandwidths to the specification of the required quality of the finished film and typical disturbances that enter the process, specifications are developed for the design of the actuators, the sensing system and the control algorithm. It is shown that the current generation of control systems is not suitable for controlling variations over small areas of sheet, but a system which regulates over much smaller areas could be developed using recent developments in sensors and two-dimensional control algorithms.

Paper Details

Date Published: 1 July 2001
PDF: 8 pages
J. Electron. Imag. 10(3) doi: 10.1117/1.1379770
Published in: Journal of Electronic Imaging Volume 10, Issue 3
Show Author Affiliations
Stephen R. Duncan, Univ. of Oxford (United Kingdom)


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