传感技术学报Issue(6)：814-818,5.DOI:10.3969/j.issn.1004-1699.2015.06.007
基于小波降噪的MEMS惯导系统对准方法研究∗
Research on the Initial Alignment of MEMS INS Based on Wavelet De-Noising
摘要
Abstract
According to the low signal noise ratio of present MEMS devices caused by its processing technology, which influence the initial problem of MEMS inertial systems. The coarse alignment by gravity plus geomagnetic in-formation based on wavelet de-noise was proposed in this paper. The structure of MEMS output information was ana-lyzed. The de-noising with different wavelet function and decomposition levels were compared and the wavelet de-composition scheme was designed and used to filter out the inertial devices’ noise effectively. Considering the fact that gravity vector perpendicular to the level of local geographical coordinate system,the vehicle’ss initial horizontal attitudes could be confirmed by the gravity vector’ss level component sensed by accelerometers. Combined with the sole direction feature of geomagnetic information,the initial azimuth angle could be calculated by measuring geomag-netic information and the magnetic declaration angle. Turntable experiment results show that,the gravity and geo-magnetic information processed by wavelet de-noise could be used to realize the initial alignment of MEMS.关键词
MEMS/惯导系统/小波降噪/初始对准Key words
MEMS/inertial navigation system/wavelet de-noising/initial alignment分类
信息技术与安全科学引用本文复制引用
孙伟,丁伟,李瑞豹,闫慧芳..基于小波降噪的MEMS惯导系统对准方法研究∗[J].传感技术学报,2015,(6):814-818,5.基金项目
国家自然科学基金项目(41304032) （41304032）
高等学校博士学科点专项科研基金(新教师类)(20132121120005) （新教师类）
对地观测技术国家测绘地理信息局重点实验室开放基金项目( K201401) （ K201401）
江西省数字国土重点实验室开放研究基金项目( DLLJ201501) （ DLLJ201501）
地球空间环境与大地测量教育部重点实验室开放基金项目(14-01-05) （14-01-05）
