Modified Smith predictor design for periodic disturbance rejection

Han Qin Zhou, Qing Guo Wang, Liu Min

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


In this paper, a modified Smith predictor control scheme is proposed for periodic disturbance rejection in both stable and unstable processes with time delay. Without affecting the superior setpoint response of Smith predictor control, the regulation performance under periodic disturbance can be enhanced significantly by the proposed design. Meanwhile, the asymptotical rejection for non-periodic disturbance will also be improved. Internal stability is investigated for a closed-loop control system. The effectiveness of the proposed scheme will be demonstrated by simulations as well as a test on an experimental thermal system.

Original languageEnglish
Pages (from-to)493-503
Number of pages11
JournalISA Transactions
Issue number4
Publication statusPublished - Oct 2007
Externally publishedYes


  • PID control
  • Periodic disturbance
  • Smith predictor
  • Time delay
  • Unstable process

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Instrumentation
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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