动态寻北中有色噪声的影响分析  

Influence Analysis of Colored Noise in Dynamic North Seeking

作　　者：蒋庆仙[1,2] 王成宾[1,2] 白云超[1,2] 马小辉[1,2] 

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2013年第5期64-68,共5页Geomatics Science and Engineering

基　　金：国家自然科学基金资助项目（41004013和41004080）.

摘　　要：为了分析有色噪声对动态寻北参数估计的影响，依据建模的实际需要进行了有色噪声的存在性检验；利用观测残差建立了有色噪声的AR模型，对有色噪声进行了拟合与预报，并利用改正后的观测值进行了参数估计。计算结果表明，当陀螺读数中包含有色噪声时，采用AR模型对有色噪声进行拟合与预报，能够有效削弱有色噪声的影响，相比不考虑有色噪声影响，寻北精度得到很大提高。In order to analyze the influence of colored noise on parameter estimation in dynamic north seeking, an existence test of colored noise in observation is performed according to requirements of modeling. The AR model of colored noise is estab- lished with observation residuals, the colored noise is fitted and predicted, and the parametric estimation using corrected observa- tion is conducted. The calculation results show that when colored noise exist in gyroscope readings, fitting and predicting colored noises by adopting AR model can effectively reduce the effect of colored noise, and the north seeking accuracy will be greatly im- proved compared with that ignoring the effect of colored noise.

关 键 词：动态寻北 陀螺仪 有色噪声拟合 AR模型 抗差估计 

分 类 号：P207[天文地球—测绘科学与技术]