Analysis of information characteristics of a dynamic displacement doppler transducer signal

Abstract

The article discusses the main features of the analysis of the Doppler transducer output signal that allow conducting experiments to determine the parameters of the oscillation of rotating elements of power units. A Doppler discrete- phase method that has fewer restrictions as compared to the classical discrete-phase method is presented. The theoretical rationale for the formation of the Doppler transducer output signal in the case of its non-contact interaction with the surface of the object under control (characteristic information sections of the output signal are considered) is presented. An analysis of the output waveform near its extreme values in the presence and absence of vibration of the controlled object is carried out using the waveforms obtained in conducting the pilot study as an example. Distinctive features of the output signal due to the rotation of the rotor and the vibrational motion of the surface of the blade controlled are discussed.

About the authors

A. I. Danilin

Samara National Research University

Author for correspondence.
Email: aidan@ssau.ru

Doctor of Science (Engineering), Professor 
Head of the Department of Radio Engineering

Russian Federation

A. A. Gretskov

Samara National Research University

Email: greckov1989@rambler.ru

postgraduate student

Russian Federation

References

  1. Danilin A.I. Beskontaktnye izmereniya deformatsionnykh parametrov lopatok v sistemakh kontrolya i upravleniya turboagregatami [Non-contact measurement of deformation parameters of blades in the systems of monitoring and control of turbine units]. Samara: Samarskiy Nauchnyy Tsentr RAN Publ., 2008. 217 p.
  2. Zablotskiy I.E., Korostelev J.A., Shipov R.A. Beskontaktnye izmereniya kolebaniy lopatok turbomashin [Non-contact measurement of turbomachinery blade oscillation]. Moscow: Mashinostroenie Publ., 1977. 159 p.
  3. Noskov V.Ya., Smolskiy S.M. Registration of an autodyne signal in the supply circuit of generators and UHF semiconductor diodes (review). Tekhnika i pribory SVCh. 2009. No. 1. P. 14-26. (In Russ.)

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