摘要
针对旋转捷联系统组合对准过程中外设备与惯导系统信息更新频率不同步问题,该文提出一种无外观测信息的组合对准方法:简述了旋转调制型捷联惯导系统,采用数字高通滤波器提取了载体的瞬时速度,并利用谱条件数法计算出惯性测量单元静止和旋转状态下捷联系统的可观测度;然后将滤波提取的瞬时速度与惯导解算速度作差视为观测量进行卡尔曼组合对准。实验结果表明:无外观测信息的组合对准方法可以满足旋转捷联系统的对准需求。
Aimed at the update frequency out of sync between equipment and inertial navigation system information in rotary strap down system combination alignment process,a combination alignment method without observation information was proposed in this paper.Firstly,it described the rotating modulation type of strap down inertial navigation system,adopted the digital high-pass filter to extract the instantaneous velocity of the carrier,and used spectrum condition number method to calculate the inertial measurement unit for static and rotating state.Secondly,the significant measure of the strap down system between instantaneous velocity and inertial navigation calculating velocity was extracted by the filter.Finally,the experimental results showed that the method without observation information combination alignment could meet the demand of rotary strap down system alignment.
出处
《测绘科学》
CSCD
北大核心
2015年第2期29-34,共6页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41304032)
第6批中国博士后科学基金特别资助项目(2013T60298)
第51批中国博士后科学基金面上资助项目(2012M510830)
辽宁省教育厅科学研究一般项目(L2011047)
辽宁省科技厅博士启动基金项目(20121084)
测绘遥感信息工程国家重点实验室资助项目(12P01)
作者简介
徐爱功（1963），男，辽宁阜新人，教授，博士，从事全球卫星定位系统与地理信息系统集成及其在智能交通系统中的应用研究与教学工作。E—mail：xu_ag@126．com
通讯作者：王大雪E—mail：heavysnowwaiting@126．com
