摘  要：为实现具有密集频谱的频谱校正分离，通过研究基于复调制移频和低通滤波器的传统Zoom-FFT方法和频谱校正方法，提出一种电流信号高准确度分离方法。该方法采用基于复解析带通滤波器和复调制移频的频谱细化方法和比值校正法对电流信号进行频谱细化校正，实现电流信号的高准确度分离。研究结果表明，该文采用的频谱细化校正方法运算量小，计算速度快、准确度高，能够实现电流信号的高准确度分离。

关键词：电流信号；密集频谱；频率细化；频谱校正

文献标志码：A     文章编号：1674-5124（2015）12-0111-04

High-precision separation technology of current signal based on

intensive spectrum correction

LEI Xiaoya1，2， LI Guizi1，2， ZHU Lin1，2， WANG Ji1，2

（1. Key Laboratory of Mechanical Product Testing and Technical evaluation，Lanzhou 730030，China；

2. Gansu Academy of Mechanical Sciences，Lanzhou 730030，China）

Abstract: To achieve the correction and separation of the spectrum that has dense spectrum， the spectrum correction， a high-precision separation method of the current signal has been proposed through studying the methods of traditional Zoom-FFT based on the multiple modulation frequency-shifting and low-pass filter. Methods of spectrum zoom based on the multiple analytical band-pass filter and multiple modulation frequency-shifting and the ratio correction have been used to realize the refinement and correction of the current signal. Finally， high-precision separation of current signal has been achieved. The results have shown that the methods of spectrum zoom and spectrum correction that this paper has used have less computing amount， the quick computing speed and high accuracy， and the high-precision separation of current signal can be achieved.

Keywords: current signals； intensive spectrum； spectrum zoom； spectrum correction