Random Errors in Measuring Radial Clearances in Turbomachines and Technique for Decreasing Them
V. N.
Belopukhov
1 2 *
1Samara Federal Research Center, Russian Academy of Sciences, Samara, 443020
Russia
2Institute for the Control of Complex Systems, Russian Academy of Sciences, Samara, 443020
Russia
Correspondence to:
*e-mail: bvnsam50@gmail.com
September 13, 2019
Abstract—A simple-to-implement technique for measuring radial clearances with controlled precision due to decreasing random components of errors is considered. The quantitative estimates of precision, performance, and efficiency of the proposed technique are provided. This technique is stochastic, is based on characteristics of random errors and on periodicity of blade wheel rotation, and allows obtaining the measurement results with uniform precision in the entire range of rotation speeds of the turbomachine rotor. The considered technique makes it possible to avoid procedures for approximating numerical readouts.
Keywords:
turbomachineblade wheelperiod of rotationsystem for measuring radial clearanceseddy current sensormeasuring circuit interferencediscretization errorstatistical characteristicsextreme value of codeamplitude valueaveraging of codes
DOI: 10.3103/S8756699020060047