Robust stability analysis of fractional order interval polynomials

TAN N., Oezgueven O. F., Oezyetkin M. M.

ISA TRANSACTIONS, cilt.48, sa.2, ss.166-172, 2009 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 48 Sayı: 2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.isatra.2009.01.002
  • Dergi Adı: ISA TRANSACTIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.166-172
  • Anahtar Kelimeler: Fractional order interval polynomial, Fractional order control system, Uncertain systems, Robust stability, Kharitonov theorem, Edge theorem, FREQUENCY-RESPONSE, SYSTEMS, POLE
  • İnönü Üniversitesi Adresli: Evet

Özet

The paper deals with the robust stability analysis of a Fractional Order Interval Polynomial (FOIP) family. Some new results are presented for testing the Bounded Input Bounded Output (BIBO) stability of dynamical control systems whose characteristic polynomials are fractional order polynomials with interval uncertainty structure. It is shown that the Kharitonov theorem is not applicable for this type of polynomial. A procedure is given for computation of the value set of FOIP. Based on the value set, an algorithm is presented for testing the stability of FOIP. The results presented in the paper are useful for the analysis and design of Fractional Order Interval Control Systems (FOICS). Examples are given to show how the proposed method can be used to assess the effects of parametric variations on the stability in feedback loops with fractional order interval transfer functions. (C) 2009 ISA. Published by Elsevier Ltd. All rights reserved.