A two-degree-of-freedom smith control for improved disturbance rejection

Qing Guo Wang, Xiang Lu, Han Qin Zhou, Tong Heng Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A two-degree-of-freedom Smith control scheme is proposed for improved disturbance rejection for stable delay processes. The resulting set-point and disturbance responses can be tuned by two controllers separately. A novel disturbance controller design is presented with easy tuning and greatly improved performance. The internal and robust stability issues are discussed. Examples are provided for illustration.

Original languageEnglish
Title of host publicationProceedings of the 16th IFAC World Congress, IFAC 2005
PublisherIFAC Secretariat
Number of pages6
ISBN (Print)008045108X, 9780080451084
Publication statusPublished - 2005
Externally publishedYes

Publication series

NameIFAC Proceedings Volumes (IFAC-PapersOnline)
ISSN (Print)1474-6670


  • Delay systems
  • Disturbance rejection
  • Process control
  • Smith predictor

ASJC Scopus subject areas

  • Control and Systems Engineering


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