On-Line Measurement and Tracking of Turbine Torsional Vibration Resonances Using a New Encoder Based Rotational Vibration Method (RVM) 961306
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.
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. Download Citation
Walter Hernandez, Debabrata Paul, Frederick Vosburgh
Monitoring Technology Corporation
Aerospace Atlantic Conference & Exposition
SAE 1996 Transactions - Journal of Aerospace-V105-1