| 小波域中值滤波器在陀螺寻北仪中的应用 |
| |
| 引用本文： | 陈刚,张朝霞,庄良杰.小波域中值滤波器在陀螺寻北仪中的应用[J].天津大学学报(自然科学与工程技术版),2006,39(7):797-800. |
| |
| 作者姓名： | 陈刚 张朝霞 庄良杰 |
| |
| 作者单位： | [1]天津大学机械工程学院,天津300072 [2]天津航海仪器研究所,天津300131 |
| |
| 摘 要： | 研究了利用小波变换消除陀螺干扰漂移的方法．通过对陀螺寻北仪两位置寻北方案的分析，表明陀螺随机干扰信号是影响系统精度的主要误差源．为此将中值滤波与小波阈值去噪相结合构造了小波域中值滤波器，并应用于陀螺数据处理中．寻北试验结果表明，该滤波器在有效对白噪声滤波的同时也能较好地去除脉冲噪声，与传统的去噪方法相比，寻北精度提高20％，对陀螺各种干扰信号具有很好的抑制作用．
|
| 关 键 词： | 陀螺寻北仪 小波变换 小波域中值滤波器 阈值去噪 |
| 文章编号： | 0493-2137（2006）07-0797-04 |
| 收稿时间： | 2005-06-14 |
| 修稿时间： | 2005-06-142005-12-23 |
Application of Wavelet Domain Median Filter in Gyro North Finder |
| |
| CHEN Gang,ZHANG Zhao-xia,ZHUANG Liang-jie.Application of Wavelet Domain Median Filter in Gyro North Finder[J].Journal of Tianjin University(Science and Technology),2006,39(7):797-800. |
| |
| Authors: | CHEN Gang ZHANG Zhao-xia ZHUANG Liang-jie |
| |
| Institution: | 1. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China; 2. Tianjin Navigation Instrument Research Institute, Tianjin 300131, China |
| |
| Abstract: | The method to eliminate gyroscope interference drift by wavelet transforms was investigated.The two position directional scheme for gyro north finder was analyzed,and the result showed that the gyro's stochastic noise is the main factor which affects the system performance.Therefore based on the median filter and the threshold de-noising of wavelet,the wavelet domain median filter was formed,and it was applied to the gyro's signal processing.The directional experiment demonstrated that this filter can not only filter out the white noise but also eliminate the pulse noise.Compared with the traditional method,the accuracy of the system is nearly 20% and the gyro's interferential signal can be restrained effectively. |
| |
| Keywords: | gyro north finder wavelet transforms wavelet domain median filter threshold de-noising |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
