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Abstract

This paper presents the bases of a new method of monitoring technical condition of turbomachine blades during their operation. The method utilizes diagnostic models such as a quotient of amplitude amplification and a phase shift of diagnostic signal y(t) which is a result of blade operation as well as a signal x(t) of blade environment while a blade tip approaches a sensor, amplitude amplification and phase shift of these signals while the blade tip moves away from the sensor. The adopted diagnostic models indirectly take into account the existing environment of a blade, represented by the signal x(t), without the need to measure it. Thus, the model is sensitive to the changes in technical condition of blades and practically intensive to a change in environment. The suggested method may prove very important in diagnostics of rotor blades during turbomachines operation (compressors, turbines etc.).

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Authors and Affiliations

Paweł Lindstedt
Rafał Grądzki

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