Tatsuya MAEDA

Study on estimation of the typical vibration time waveform

Yasuyuki MIYAKI

Periodically, in order to know the typical waveform of the sound amplitude is not constant, then the time waveform of EXCEL and once by the figure, typically sought by hand. However, the number of data is always available and the time waveform of the figure by EXCEL and is not limited, to find the typical visual manual is considered to be caused by individual differences. In this study, FFT to analyze the targeted time waveform vibration do not need, can be viewed at the same time changes in frequency and peak value time waveform vibration interactively with the computer typical time waveform intended to develop such a program can be estimated.
To estimate the change in frequency and vibration time waveform peak value, and create a frequency distribution frequency distribution frequency amplitude. Change in the vibration time waveform peak amplitude frequency distribution was used to estimate the intended change in frequency from the frequency distribution frequency. In order to compare the value of the entire range of data and data predicted by the program, average, maximum, minimum, RMS was used as a comparison material. Were estimated by some vibration time waveforms, the following conclusions were obtained.
To know the typical behavior of the time waveform ­¡, EXCEL and vibration time waveform diagram of the time, such as finding the value represented by hand rather than shorten the time, was found to be effective.
­¢ FFT to analyze the vibration time waveform that does not need is to understand the characteristics of the waveform using a program developed in this study were able to infer typical.
Even if the behavior is severe vibration time waveform amplitude ­£, calculated as the representative to be effective in the entire data value has been formed.

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