Decentralised controller structure design and retrofit of process systems based on graph theory

Tamás Schné, K. Hangos

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A relative degree matrix-based design method is proposed in this article by using graph theoretical methods for optimal control structure design consisting of single input-single output control loops. This approach enables us to use an efficient algorithm for finding a maximum weighted matching to solve the controller structure selection problem. The resulting optimal structures have been refined by analysing the zero dynamics of the input-output pairs. A novel method for decentralised controller structure retrofit is also proposed in this article. A graph theoretic algorithm is developed, which is based on finding the closest weighted maximum matching. Possible changes in efficiency in the controller structure, which may arise after retrofit, are illustrated using a heat exchanger network retrofit case study.

Original languageEnglish
Pages (from-to)1023-1033
Number of pages11
JournalInternational Journal of Systems Science
Volume42
Issue number6
DOIs
Publication statusPublished - Jun 2011

Fingerprint

Graph theory
Decentralized
Controller
Controllers
Heat exchangers
Maximum Matching
Heat Exchanger
Output
Graph in graph theory
Design Method
Optimal Control
Efficient Algorithms
Design
Zero

Keywords

  • decentralised controller structure retrofit
  • decentralised controller structure selection
  • graph theory
  • nonlinear systems

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Theoretical Computer Science
  • Computer Science Applications

Cite this

Decentralised controller structure design and retrofit of process systems based on graph theory. / Schné, Tamás; Hangos, K.

In: International Journal of Systems Science, Vol. 42, No. 6, 06.2011, p. 1023-1033.

Research output: Contribution to journalArticle

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