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Sensitivity analysis of CRA based controllers in fractional order systems

Tabatabaei, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.sigpro.2012.01.014
  3. Publisher: Elsevier , 2012
  4. Abstract:
  5. This paper focuses on robust performance analysis of a closed loop fractional order system through a sensitivity approach. The characteristic ratio assignment method is selected to attain a desired closed loop transient response. Then, we compute the sensitivity of such a desired transfer function with respect to its characteristic ratio and we explore its specifications. The relation between the coefficient diagram shape and the relative stability of the closed loop system is discussed. Also, the closed loop poles variations due to the changes in the characteristic ratios are investigated. Finally, we study a pseudo second order process to verify the robust performance of the characteristic ratio assignment approach with RST control structure
  6. Keywords:
  7. Characteristic ratio assignment ; Characteristic ratio ; Closed loops ; Closed-loop poles ; Control structure ; Fractional-order systems ; Pseudo second order ; Relative stabilities ; Robust performance ; Robust performance analysis ; Sensitivity approach ; Closed loop systems ; Sensitivity analysis ; Speed control ; Algebra
  8. Source: Signal Processing ; Volume 92, Issue 9 , September , 2012 , Pages 2040-2055 ; 01651684 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S016516841200028X