Influence of interfering factors in a system for measuring radial clearances in gas-turbine engines with self-compensation of temperature influences
S. Yu. Borovik, P. E. Podlipnov, Yu. N. Sekisov, O. P. Skobelev
Institute of Control of Complex Systems, Russian Academy of Sciences, Samara, Russia
Keywords: система измерения, радиальный зазор, одновитковый вихретоковый датчик, самокомпенсация температурных воздействий, мешающие факторы, функции преобразования, функции влияния, measurement system, radial clearance, single-turn eddy current sensor, self-compensation of temperature effects, interfering factors, conversion functions, influence functions
Abstract
This paper presents the results of analysis of the influence of interfering factors on changes in the informative parameter of a single-turn eddy current sensors, which are used as initial data in the study of a system for measuring radial clearances with self-compensation of temperature effects on the sensor. Conversion functions of the measuring circuit with a connected single-turn eddy current sensor are obtained in analytical form. The conversion functions are dependences of the extreme values of codes at the measuring circuit output on radial clearances and temperature effects on the sensor taking into account the influence of interfering factors (neighboring blades, blade temperatures, axial displacements of the gas turbine engine compressor rotor). Quantitative estimates are obtained for the influence functions of these interfering factors on the calculated difference of the extreme values of codes in the system, which characterizes the measured parameter.
|
