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On-Line Measurement and Tracking of Turbine Torsional Vibration Resonances Using a New Encoder Based Rotational Vibration Method (RVM)
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English
Abstract
A novel digital signal processing method is presented for isolating the vibrational resonances of rotor components from engine tachometer signals. Speed Clock resampling removes spectral leakage and spreading. Sideband manipulation removes AM signal components. Spectral addition removes translational FM components. Sideband multiplying and averaging removes random noise. The result is a spectrum of high resolution and dynamic range comprised of isolated engine rotor resonances, which can be used to track health and performance in engines and other turbomachines.
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Citation
Hernandez, W., Paul, D., and Vosburgh, F., "On-Line Measurement and Tracking of Turbine Torsional Vibration Resonances Using a New Encoder Based Rotational Vibration Method (RVM)," SAE Technical Paper 961306, 1996, https://doi.org/10.4271/961306.Also In
References
- Bently, D.E. 1991 Vibration monitoring techniques and shaft crack detection on reactor coolant pumps and recirculation pumps Proc. Main Cool. Pump Diag. Symp . EPRI NP-6116:4/1-31
- Meirovitch, L. 1967 Analytical Methods in Vibration Macmillan Publishing Co. NY
- Oppenheim, A. V. Shafter, R.W. 1975 Digital Signal Processing Prentice-Hall, Inc. NJ