Abstract
This paper is concerned with a method to evaluate signal transmission paths (STP) in dynamic systems. The STP analysis in the present study intends to clarify through fluctuation analysis the cause-effect relationship between measured signals in both qualitative and quantitative manner. In order to facilitate the analysis, we define a new function called signal power contribution ratio which represents relative contributions to the output from the input. The analysis is executed through comparative evaluation of the coherence, noise power contribution and signal power contribution functions calculated based upon autoregres-sive modeling. It is shown that comparison of these three functions provides information useful to evaluate the signal transmission paths. The present method has been applied to noise signals collected at Japan Power Demonstration Reactor (JPDR)-II. The result of the analysis suggested its effectiveness for investigation of at-power reactor noise, especially in identifying possible nois...
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