Design of decoupled PID controllers for MIMO systems

Karl Johan Åström, Karl Henrik Johansson, Qing Guo Wang

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

The design of PID controllers for systems with interacting loops is discussed. It is important to deal with the interaction at the lower-level loops, since supervisory control based on for instance MPC seldom has sufficient bandwidth. A new scheme based on modified scalar PID design and static decoupling is developed, where the frequency characteristics of the coupling between the lower-level loops is taken into account. This leads to a design method emphasizing the trade-off between the individual loop performances and the so called interaction indices. The controller is easily implemented, due to its simple configuration based on standard components. The method is applied to a couple of examples.

Original languageEnglish
Pages (from-to)2015-2020
Number of pages6
JournalProceedings of the American Control Conference
Volume3
DOIs
Publication statusPublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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