Initial Alignment Method of Strapdown Inertial Navigation System for Shipbased Weapons
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摘要: 摇摆运动及杆臂效应误差是影响舰载武器系统对准精度的主要因素。基于舰载武器特点, 建立了捷联惯导系统(SINS) 在摇摆基座下的误差模型, 详细分析了一种舰载武器的自主式初始对准方案, 在传统反求杆臂长度补偿杆臂效应方法的基础上, 提出了一种新的补偿杆臂效应的方法, 并通过仿真验证表明, 该方法比传统的杆臂长度补偿法具有更高的精度, 研究结果可为舰载武器对准方案的选择与设计提供理论依据。Abstract: The swaying movement and the lever arm effect erro r are two major factors affecting the alignment accuracy of shipbased weapons. Based on the characteristics of shipbased weapons, an error model of strapdown inertial navigation system(SINS) is established on a swaying base, and an autonomous initial alignment method of shipbased weapons is analyzed in details. On the basis of the conventional compensation method of the lever arm effect error, a new method for compensating this error is proposed. The simulation results show that the new method has higher precision than that of the conventional one. This investigation would be expected to offer atheoretical foundation to the design and selection of alignment scheme for SINS of shipbased weapons.
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