基于虚拟仪器的谐波加窗插值FFT算法

Interpolating Window FFT Algorithm Based on Virtual Instrument

阐述了谐波产生的原因及危害,比较了近些年来国内在谐波测量方面的相关研究成果,借鉴了快速傅里叶变换(FFT)加窗插值算法在测量谐波幅值、频率和相位上准确、快速的优点,结合虚拟仪器,开发了基于LabVIEW的FFT加窗插值算法。实验结果表明,该算法可实现对谐波的精确测量。

The causes and hazards of harmonic were expounded.The relevant research results in recent year of domestic harmonic measurements compared.The accuracy and rapidity of interpolating window FFT algorithm in measuring harmonic amplitude,frequency and phase were used for reference.Combined with the virtual instrument,the interpolating window FFT algorithm based on LabVIEW was developed.Experiment results showed that the algorithm was able to achieve the accurate measurement of harmonics.