Model for Blade Diagnosis in a Working Rotor Machine Employing the Method of Virtual Elimination of Stochastic Environment

Autor: Lindstedt, Pawel, Gradzki, Rafal
Zdroj: Archive of Mechanical Engineering; January 2011, Vol. 58 Issue: 3 p305-318, 14p
Abstrakt: Model for Blade Diagnosis in a Working Rotor Machine Employing the Method of Virtual Elimination of Stochastic EnvironmentThis 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 a 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 [13, 15]. Thus, the model is sensitive to the changes in technical condition of blades and practically insensitive to a change in environment. The suggested method may prove very important in diagnostics of rotor blades during turbomachines operation (compressors, turbines etc.).
Databáze: Supplemental Index