MODELING THE PROCESS OF MEASURING RADIAL AND AXIAL DISPLACEMENTS OF COMPLEX-SHAPED BLADE TIPS
S. Yu. Borovik, M. M. Kuteynikova, P. E. Podlipnov, Yu. N. Sekisov, O. P. Skobelev
Institute for the Control of Complex Systems, Russian Academy of Sciences, ul. Sadovaya 61, Samara, 443020 Russia
Keywords: лопатки сложной формы, радиальные и осевые смещения, одновитковый вихретоковый датчик, влияние соседних лопаток, функции преобразования и влияния, complex-shaped blade tips, radial and axial displacements, single-coil eddy current sensor, influence of adjacent blades, conversion and influence functions
Abstract
This paper gives brief descriptions of the distinctive features of the method of measuring radial and axial displacements of complex-shaped blade tips (employed in turbines) using a distributed cluster of single-coil eddy current sensors (SCECS) with a sensitive element (SE) in the form of conductor strips, known models of the electromagnetic interaction of SCECS SEs with the controlled and adjacent blades, and a measuring circuit (MC) with a cluster of two SCECSs designed for computational experiments. Results of experiments in the form of families of conversion functions (dependences of the equivalent inductances of SEs or digital codes at the MC output on the desired radial and axial displacements of the blade tip) and families of influence functions of adjacent blades on the equivalent inductances of the SE and the MC output codes are considered.
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