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Vibrations of Rotating MachinerySignal Processing for Rotor Vibration Diagnosis

Vibrations of Rotating Machinery: Signal Processing for Rotor Vibration Diagnosis [In the vibration diagnosis of rotating machines, the first attention is the evaluation of the unbalance vibration, i.e., the rotational synchronous point of vibration, noted as “1X” or “1N” vibration. A vector monitor (R1_Fig. 5.8) is a measuring instrument including a tracking filter that extracts only the 1X vibration component from the actual vibration waveform. In this chapter, the principle and the application of this vector monitor are explained. In the following, attention is given to the transformation from the waveforms in the time domain to amplitude (spectrum) in the frequency domain by using a FFT analyzer. We learn about the theory of signal processing related to FFT analysis, which is capable of providing numerous displays for easy understanding and effective diagnosis for vibration troubleshooting.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Vibrations of Rotating MachinerySignal Processing for Rotor Vibration Diagnosis

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Publisher
Springer Japan
Copyright
© Springer Japan KK, part of Springer Nature 2019
ISBN
978-4-431-55452-3
Pages
301 –351
DOI
10.1007/978-4-431-55453-0_10
Publisher site
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Abstract

[In the vibration diagnosis of rotating machines, the first attention is the evaluation of the unbalance vibration, i.e., the rotational synchronous point of vibration, noted as “1X” or “1N” vibration. A vector monitor (R1_Fig. 5.8) is a measuring instrument including a tracking filter that extracts only the 1X vibration component from the actual vibration waveform. In this chapter, the principle and the application of this vector monitor are explained. In the following, attention is given to the transformation from the waveforms in the time domain to amplitude (spectrum) in the frequency domain by using a FFT analyzer. We learn about the theory of signal processing related to FFT analysis, which is capable of providing numerous displays for easy understanding and effective diagnosis for vibration troubleshooting.]

Published: Mar 18, 2020

Keywords: Signal processing; PLL (Phase-locked loop); Vector monitor; MATLAB; Unbalance forward/backward orbit; CFT; DFT (FFT); Aliasing error; Fourier transform; Frequency response analysis (FRA); Zooming; Full spectrum

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