Development of a cascaded controller for temperature and core growth rate in vapour-phase axial deposition

H. E. Jenkins, M. L. Nagurka

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)863-875
Number of pages13
JournalProceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering
Volume223
Issue number6
DOIs
StatePublished - 1 Sep 2009
Externally publishedYes

Keywords

  • Optical fibre fabrication
  • Process control
  • VAD

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