| 利用中位数进行光纤陀螺信号抗差估计 |
| |
| 引用本文： | 蒋庆仙,王成宾,马小辉,陈晓璧.利用中位数进行光纤陀螺信号抗差估计[J].武汉大学学报(信息科学版),2011(6). |
| |
| 作者姓名： | 蒋庆仙 王成宾 马小辉 陈晓璧 |
| |
| 作者单位： | 西安交通大学机械工程学院;西安测绘研究所; |
| |
| 基金项目： | 国家自然科学基金资助项目(41004013) |
| |
| 摘 要： | 为了削弱光纤陀螺信号中异常噪声对寻北精度的影响,在滤除高频周期噪声的基础上,提出了一种处理陀螺信号的新算法。推导了陀螺信号的抗差解公式及其误差影响函数,取观测值的中位数作为抗差初值,利用一次抗差估计求得的观测残差再用中位数法求得均方差因子,并给出了高崩溃污染率的初值辅以IGGⅢ方案迭代解算的混合算法。计算结果表明,基于可靠初值和均方差因子估值的抗差估计可以有效削弱异常干扰对陀螺的影响。
|
| 关 键 词： | 抗差估计 中位数 粗差 陀螺漂移 异常干扰 |
Robust Estimation for FOG Signal Based on Median Method |
| |
| JIANG Qingxian, WANG Chengbin MA Xiaohui CHEN Xiaobi.Robust Estimation for FOG Signal Based on Median Method[J].Geomatics and Information Science of Wuhan University,2011(6). |
| |
| Authors: | JIANG Qingxian WANG Chengbin MA Xiaohui CHEN Xiaobi |
| |
| Institution: | JIANG Qingxian1,2 WANG Chengbin2 MA Xiaohui2 CHEN Xiaobi2(1 School of Mechanical Engineering,Xi'an Jiaotong University,28 West Xianning Road,Xi'an 710049,China)(2 Xi'an Research Institute of Surveying and Mapping,1 Middle Section,Yanta Road,Xi'an 710054,China) |
| |
| Abstract: | In the strap-down gyro north seeker,gyro drift are primary factors to degrade orientation accuracy.On the basis of eliminating high frequency periodic noises,a new algorithm based on robust estimation is presented to degrade the influence of abnormal noises on the accuracy of FOG north seeker.The robust estimation formula of FOG and its influence function are deduced.Robust estimation serves the median of observations for the robust initial value and applies the median of the residuals of the first epoch ro... |
| |
| Keywords: | robust estimation median outlier gyro drift abnormal disturbance |
| 本文献已被 CNKI 等数据库收录！ |
|
