Accuracy of Determination of the Parameters of Vibration of Turbomachine Blades with the Use of a Nonlinear Approximation of the Signals of Primary Transducers

Abstract

We describe a method for the determination of the parameters of vibration of the elements of rotating units of turbomachines. This method is based on the analysis of changes in the shape of the output signal of a primary transducer. The efficiency of the method is demonstrated for broad ranges of operating parameters of the oscillatory processes. We reveal possible problems in the realization of the method and propose some methods for their solution. We also study the accuracy characteristics of the proposed method for various signal-to-noise ratios of the output signal of primary transducer.