Real-time frequency analysis method

摘要

PROBLEM TO BE SOLVED: To provide a method for real-time analysis of a frequency, that reduces a load on a processor, requires less storage capacity, and, especially, is suitable for the vibration characteristic evaluation of a structure.;SOLUTION: The method for real-time analysis of a frequency, for calculating the temporal change in a specific frequency component (for example, when acquiring the change of a frequency component being the same as the number of rotation of a rotation apparatus concerning a vibration in the periphery of the rotation apparatus), includes: a narrow band frequency component waveform extraction step (step S1) for extracting the waveform of a frequency component in a narrow band close to any one center frequency; an absolute value calculation step (step S2) having the function of an absolute value circuit for acquiring the absolute value of the waveform extracted in the narrow band frequency component waveform extraction step; and a moving average calculation step (step S3) for acquiring a moving average for each arbitrary time with respect to the output absolute value waveform in the absolute value calculation step.;COPYRIGHT: (C)2013,JPO&INPIT