Title

Development of a Cascaded Controller for Temperature and Core Growth Rate in Vapour-Phase Axial Deposition

Document Type

Conference Proceeding

Language

eng

Publication Date

9-1-2009

Publisher

SAGE Publications

Source Publication

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine

Source ISSN

0954-4119

Abstract

A cascaded feedback control strategy for an industrial vapour-phase axial deposition (VAD) process is investigated in this paper. VAD is a widely used process in the creation of high-purity glass for optical fibre. In previous work a soot tip surface temperature controller was developed for the VAD process to reduce the effects of core soot temperature variation on deposition geometry, leading to a more stable process. However, it is desired to regulate both the core soot and clad soot such that they deposit at the same axial rate to provide a more uniform product. This paper presents the development of a cascaded controller strategy and process model to couple and regulate the surface temperature and deposition rates of core and clad soot. Simulation studies demonstrate a potential improvement in the uniformity of the core and clad soot geometry over the soot product length.

Comments

Published as a part of Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, Vol. 223, No. 6 (September 1, 2009): 863-875. DOI.

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