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.
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Notes
- 1.
Hitherto there is the expression “periodic function of period T”, but now “periodic” is changed to “synchronous with the time window having the span T”.
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© 2019 Springer Japan KK, part of Springer Nature
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Matsushita, O., Tanaka, M., Kobayashi, M., Keogh, P., Kanki, H. (2019). Signal Processing for Rotor Vibration Diagnosis. In: Vibrations of Rotating Machinery. Mathematics for Industry. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55453-0_10
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DOI: https://doi.org/10.1007/978-4-431-55453-0_10
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Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-55452-3
Online ISBN: 978-4-431-55453-0
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