Comparison of two construction algorithms for local model networks

S.C. McLoone, S. McGinnity, George Irwin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The divide-and-conquer approach of local model (LM) networks is a common engineering approach to the identification of a complex nonlinear dynamical system. The global representation is obtained from the weighted sum of locally valid, simpler sub-models defined over small regions of the operating space. Constructing such networks requires the determination of appropriate partitioning and the parameters of the LMs. This paper focuses on the structural aspect of LM networks. It compares the computational requirements and performances of the Johansen and Foss (J&F) and LOLIMOT tree-construction algorithms. Several useful and important modifications to each algorithm are proposed. The modelling performances are evaluated using real data from a pilot plant of a pH neutralization process. Results show that while J&F achieves a more accurate nonlinear representation of the pH process, LOLIMOT requires significantly less computational effort.
Original languageEnglish
Pages (from-to)1059-1072
Number of pages14
JournalInternational Journal of Systems Science
Volume33
Issue number13
DOIs
Publication statusPublished - 20 Oct 2002

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Management Science and Operations Research
  • Control and Systems Engineering
  • Theoretical Computer Science

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