ANHARMONIC FREQUENCY ANALYTICAL METHOD USING ARBITRARY SECTION WAVEFORM

摘要

PROBLEM TO BE SOLVED: To provide a waveform analytical method in which an analytical section and an analytical frequency can be set arbitrarily, in which a waveform can be analyzed with high accuracy by reducing an influence clue to a noise and which can be used to interpolate or estimate the waveform. ;SOLUTION: A sine-wave component at a prescribed cycle is found by using five values which are found on the basis of the sum of products of a waveform to be analyzed, a sine waveform and a cosine waveform and on the basis of the sum of products of a sine waveform and a cosine waveform. A cycle at which the power of a residual waveform obtained by subtracting the sine waveform component from the waveform to be analyzed becomes minimum is found. A waveform analytical method in which the detection and the removal of the sine waveform component are repeated is constituted in such a way that an orthogonal relationship is established between the sine wave component and the residual waveform.;COPYRIGHT: (C)1997,JPO