Frequency Spectrum Analysis of High Frequency Cycle Square Wave Signal Based on Discrete Fourier Transform

• Main Author: Weiliang Zeng
• Format: Article
• Language: English
• Published: IFSA Publishing, S.L. 2014-07-01
• Series: Sensors & Transducers
• Subjects: Discrete Fourier transform; High frequency; Cycle square wave signal; Frequency spectrum analysis.
• Online Access: http://www.sensorsportal.com/HTML/DIGEST/july_2014/Vol_175/P_2225.pdf

Controlling single pulse energy of pulse power, is one of the key factors to improve the processing ability of micro electrical machining, because of high frequency and small energy of single pulse, high-frequency periodic square wave power is the ideal power for micro electrical machining. High-frequency periodic square wave is composed of multiple frequency signals, vulnerable to be jammed by equipment noise and environmental noise, making the waveform deformation seriously, weakening the micro machining capability. In this paper, the detailed spectral analysis of the high frequency cycle square wave was made by the discrete Fourier transform, with the help of MATLAB, to extract the effective frequency components, determining the corresponding amplitude and the frequency equation. It provides a theoretical basis to suppress the interference signal, so as to achieve the ideal square wave signal, to provide protection for the precision machining and micro machining.