This paper deals with an application of the Yule series model for contactless (blade tip timing, BTT) measurements. The approach creates a straightforward processing procedure from the experimental data to obtain estimates of blade logarithmic decrement and natural frequency. The existing analytical expressions for confidence intervals enable a priori evaluation for the accuracy of blade oscillation characteristics estimates. Proposed sensors allocation scheme ensures oscillation sampling rates providing efficient estimates of oscillation characteristics. Real-time measurements of blade logarithmic decrement and natural frequency give a chance of this method implementation for research and health monitoring purposes.
Yule Series Model Application for Blade Tip Timing Readouts Processing Resulting in Blade Oscillation Characteristics Estimation
Manuscript received August 8, 2017; final manuscript received May 29, 2018; published online June 18, 2018. Assoc. Editor: Victor Giurgiutiu.
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Karmalita, V. (June 18, 2018). "Yule Series Model Application for Blade Tip Timing Readouts Processing Resulting in Blade Oscillation Characteristics Estimation." ASME. ASME J Nondestructive Evaluation. November 2018; 1(4): 041002. https://doi.org/10.1115/1.4040471
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