Online Time Delay and Disturbance Compensation for Linear Non-Minimum Phase Systems

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Demirtas O., EFE M. Ö.

ACTA POLYTECHNICA HUNGARICA, cilt.18, sa.8, ss.163-182, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 8
  • Basım Tarihi: 2021
  • Doi Numarası: 10.12700/aph.18.8.2021.8.9
  • Dergi Adı: ACTA POLYTECHNICA HUNGARICA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.163-182
  • Anahtar Kelimeler: Disturbance Observer, Recursive Least Squares, Smith Predictor, OBSERVER
  • Hacettepe Üniversitesi Adresli: Evet

Özet

Herein, a disturbance observer is designed for linear non-minimum phase systems. A Smith Predictor is added to the system, using Recursive Least Squares (RLS), with a forgetting factor algorithm. The combination of both approaches, eliminates the restrictive feature of the classical disturbance observer, for non-minimum phase systems and removes the necessity for precise delay measurements, for the Smith Predictor structure. The results show that the proposed design procedure preserves system stability, in the presence of disturbances and time delays.