Technical communique: An improved phase method for time-delay estimation

  • Authors:

  • Svante Björklund;Lennart Ljung

  • Affiliations:

  • Swedish Defence Research Agency, Box 1165, SE - 581 11, Linköping, Sweden;Division of Automatic Control, Department of Electrical Engineering, Linköping University, SE-581 83 Linköping, Sweden

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2009

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Abstract

A promising method for estimation of the time-delay in continuous-time linear dynamical systems uses the phase of the all-pass part of a discrete-time model of the system. We have discovered that this method can sometimes fail totally and we suggest a method for avoiding such failures.