The concepts of frozen and instantaneous transfer functions for quantifying the degree of time-variations in periodically time-varying systems

Ebrahim Louarroudi, John Lataire, Rik Pintelon

Research output: Chapter in Book/Report/Conference proceedingMeeting abstract (Book)

Abstract

This poster presents a method for quantifying the degree of time-variations in (linear) periodically time-varying systems. Based on two different concepts of a transfer function for time-varying systems (called the frozen transfer function and the instantaneous transfer function), it is shown that the difference between both transfer functions is a good measure for the degree of time-variations in the system. A clear distinction between both transfer function concepts is made, and either can be estimated with the proposed model. The methodology is supported with simulations, and is eventually applied to real measurements (flexible robot arm).
Original languageEnglish
Title of host publicationERNSI'2012, European Research Network on System Identification, 23-26 September 2012, Maastricht, The Netherlands
Publication statusPublished - 23 Sep 2012
EventUnknown -
Duration: 23 Sep 2012 → …

Conference

ConferenceUnknown
Period23/09/12 → …

Keywords

  • frozen and instantaneous transfer functions
  • time-varying systems

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