INFLUENCE OF FEEDBACK ON THE MTC ESTIMATE BY NOISE ANALYSIS

Research output: Chapter in Book/Report/Conference proceedingConference paper

1 Citation (Scopus)

Abstract

This article discusses the influence of feedback on the Moderator Temperature Coefficient (MTC) estimate by a noise analysis method. Until now feedback was considered to be negligible in the frequency band of interest. However measurements at a Belgian Nuclear Power Plant will be used to show that the influence of feedback on the MTC estimate is not negligible in the frequency band of interest. This makes the analysis difficult since the presence of feedback creates systematic errors in the MTC estimate unless special experimental conditions can be realized. The theoretical analysis will explain how the most used non-parametric estimation of the MTC is influenced by the presence of the feedback. For the explanation we will consider a simplified scheme of the MTC measurement setup with feedback. The theory will be verified by simulations in MATLAB. For the verification we consider a simplified system captured in a feedback loop. We will estimate the system for different situations. It will be seen that the non-parametric system estimate is only unbiased when the signal that is fed back to the input is negligible in comparison with the reference signal. Since the feedback is not negligible in practice, special experimental conditions are required to obtain an unbiased non-parametric MTC estimate.
Original languageEnglish
Title of host publicationProceedings of the 7th International Topical Meeting on Nuclear Plant Instrumentation, Control and Human-Machine Interface Technologies (NPIC&HMIT 2010), Las Vegas, Nevada, November 7-11, 2010
Pages662-669
Number of pages8
Publication statusPublished - 7 Nov 2010
EventFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet - Stockholm, Sweden
Duration: 21 Sep 200925 Sep 2009

Conference

ConferenceFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet
CountrySweden
CityStockholm
Period21/09/0925/09/09

Keywords

  • Moderator Temperature Coefficient
  • Noise analysis
  • Feedback

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