作者：雷小亚^1,2, 李贵子^1,2, 朱琳^1,2, 王季^1,2

作者单位：1. 甘肃省机械产品检测与技术评价重点实验室, 甘肃 兰州 730030;
2. 甘肃省机械科学研究院, 甘肃 兰州 730030

关键词：电流信号;密集频谱;频率细化;频谱校正

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。

High-precision separation technology of current signal based on intensive spectrum correction

LEI Xiaoya^1,2, LI Guizi^1,2, ZHU Lin^1,2, WANG Ji^1,2

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

2015, 41(12): 111-114  收稿日期: 2015-01-26;收到修改稿日期: 2015-03-28

基金项目: 甘肃省青年科技基金计划(1308RJYA060)

作者简介: 雷小亚(1987-),女,甘肃天水市人,助理工程师,硕士,研究方向为信号处理。

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