基于小波降噪和形态补偿的抗电磁干扰方法  

Anti-electromagnetic Interference Method Based on Wavelet De-noising and Morphology Compensation Algorithm

作　　者：杨云涛[1] 石志勇[1] 关贞珍[1] 许杨[1] 

机构地区：[1]军械工程学院,石家庄050003

出　　处：《火力与指挥控制》2011年第2期101-103,108,共4页Fire Control & Command Control

基　　金：国防"十一五"重点基金资助项目(51309060301)

摘　　要：导航载体上电气设备产生的电磁噪声是影响地磁测量精度的主要因素之一。对电气设备产生的电磁干扰特性进行了深入地研究与分析,将电磁干扰噪声分为高频交变磁扰和等效电流磁扰,并根据其不同的特性采用了不同的降噪方法。首先运用小波阈值法消除高频交变电磁噪声,然后提出了以交变磁扰噪声能量分布脊线为参量,建立消除等效电流磁扰补偿模型的算法。试验证明,该方法不但能起到较好的降噪、平滑效果,而且可以保持真实信号的突变细节,提高了地磁测量的精度。Electromagnetic noising that produced by the electric equipment on a navigation carrier is a main causation which influenced the geomagnetic measurement precision. The electromagnetic noising characteristic was researched and analyzed deeply in the article. The different de-noising methods were applied when the noise were classed into the high frequency magnetic noising and the equivalent electric current magnetic noising. The method of wavelet threshold de-noising was adopted in order to eliminate the high frequency magnetic noising. And then a compensation algorithm was put forward and molded based on the high frequency magnetic noising energy ridge envelop to eliminate the equivalent electric current magnetic noising. An experiment was conducted at last which showed that the technology not only can de-noising electromagnetic noising preferably but also can keep the actual signal break detail, and improved the geomagnetic measurement precision.

关 键 词：地磁测量 小波降噪 电磁噪声 形态补偿 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]