主惯导旋转调制对传递对准性能的影响  

Effects of MINS rotation-modulating on transfer alignment

作　　者：刘为任[1] 唐艳[2] 朱蕾[3] 庄良杰[1] 

机构地区：[1]天津航海仪器研究所,天津300131 [2]山东德州学院机电系,德州253000 [3]海军装备研究院,北京100161

出　　处：《中国惯性技术学报》2011年第1期16-20,共5页Journal of Chinese Inertial Technology

基　　金：国防科技重点预研项目(91309010301)

摘　　要：旋转调制技术在调制惯性器件常值误差,有效提高惯导系统长航时导航精度的同时,也引入了由系统旋转而造成的速度误差以旋转周期和旋转周期二倍频波动,这种波动对以速度为匹配量的传递对准有一定的影响。从旋转调制系统的误差特性出发,分析了旋转调制对以速度为匹配量传递对准的有利和不利影响,并针对不同的旋转调制周期进行了仿真验证,仿真结果表明当旋转周期远大于舒勒周期时,旋转调制引起的不利和有利影响都很小,可忽略不计;当旋转周期远小于舒勒周期时,旋转调制可提高子惯导的方位对准精度,但延长了系统的传递对准时间。例如,当旋转周期为3(°)/s时,水平对准时间由3 min延长到4 min,而对准精度由1.2′提高到0.2′;方位对准时间由10 min延长到16 min,而对准精度由2.2′提高到0.4′。The INS rotation-modulating technology can reduce the effect of constant drift of inertial instrument and improve the long-time navigation accuracy,but it also introduces the velocity error which is caused by rotation and fluctuates with rotation period and double rotation period.The effects of rotation-modulating on transfer alignment are analyzed based on the error characteristic of rotation-modulating INS,and the analysis results are tested by computer simulation.The simulation result shows that rotation-modulating has less effect on transfer alignment when rotation-modulating period is much longer than Schuler period,and can improve transfer alignment precision when rotation-modulating period is more shorter than Schuler period while transfer alignment time is longer.For example,when the rotation-modulating period is,the level alignment accuracy can be improved from 1.2′to 0.2′,while alignment time is prolonged from 3min to 4min;the azimuth alignment accuracy also can be improved from 2.2′to 0.4′,while alignment time is prolonged from 10 min to 16 min..

关 键 词：旋转调制 传递对准 误差波动 舒勒周期 

分 类 号：U666.1[交通运输工程—船舶及航道工程]