小角度晃动干扰下解析粗对准的误差分析  

Error analysis of analytic coarse alignment on gentle swaying disturbance base

作　　者：周琪[1] 秦永元[1] 赵长山[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710129

出　　处：《系统工程与电子技术》2010年第7期1493-1496,共4页Systems Engineering and Electronics

摘　　要：研究了小角度晃动干扰对捷联惯性导航系统解析粗对准的影响。阐述了平台对准失准角与晃动干扰的定量关系,讨论了晃动环境下解析粗对准的适用条件。指出平台水平对准失准角与对应的平均晃动干扰角幅值相关,方位对准精度主要取决于东向平均干扰角速度即北向地球自转角速度的信噪比(signal noise rate,SNR)。转台小角度晃动实验验证了上述结论的合理性。The chief aim of the present work is to investigate the impact of gentle swaying disturbance on analytic coarse alignment of strap-down inertial navigation system（SINS）.The quantitative relationship between the platform misalignment angles and swaying disturbance angles is described,then the applicable conditions of analytic coarse alignment on swaying disturbance base are discussed.The studies we have performed showed that platform horizontal misalignment error angles are associated with corresponding average amplitude of disturbance angles and the azimuth error mainly depends on east average disturbance angular velocity.In other words,azimuth error is related with signal noise rate（SNR） of north earth＇s angular velocity.Turntable gentle swaying experiment verifies that the above conclusion is reasonable.

关 键 词：粗对准 晃动干扰 失准角 信噪比 

分 类 号：U666.1[交通运输工程—船舶及航道工程]