Development of characteristic equations and robust stability analysis for MIMO move suppressed and shifted DMC

R. Dubay*, G. Kember, C. V. Lakshminarayan, B. Pramujati

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Discrete-time controller and closed-loop transfer functions were developed for move suppressed λ and the recently formulated m-shifted multiple-input-multiple-output (MIMO) dynamic matrix control (DMC). Using these transfer functions, robust analyses were conducted for MIMO plants by varying corresponding delay and gain ratios of the system. In all instances, robust plots indicate that the shifted DMC is less sensitive and hence more robust to variations in the plant parameters than move suppressed DMC. It was shown that the design of these MIMO DMC controllers depends on the plant closed-loop performance and overall stability, since the selection of λ and m directly influences the plant robustness and closed-loop dynamics.

Original languageEnglish
Pages (from-to)465-479
Number of pages15
JournalISA Transactions
Volume44
Issue number4
DOIs
Publication statusPublished - Oct 2005

Keywords

  • Characteristic equations
  • Move suppressed DMC
  • Robust stability
  • Shifted DMC

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