| 二频机抖激光陀螺捷联惯导系统快速?方法 |
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| 引用本文： | 高春峰,魏国,谢元平,李耿,刘灿.二频机抖激光陀螺捷联惯导系统快速?方法[J].红外与激光工程,2014,43(2):375-381. |
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| 作者姓名： | 高春峰 魏国 谢元平 李耿 刘灿 |
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| 作者单位： | 1.国防科学技术大学 光电科学与工程学院,湖南 长沙 410073 |
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| 摘 要： | 以教研室自行研制的90型二频激光陀螺捷联惯导系统为研究对象，详细分析了惯性系对准在静态及摇摆基座条件下的收敛时间、对准精度。理论分析表明，具体对准时间的取值应该根据IMU精度、算法参数设定以及扰动情况而定。经大量实验验证，静态条件下，对准150 s左右航向角收敛到稳态值，此时横摇和俯仰角振荡在1.5以内，航向角振荡在1'以内；摇摆基座条件下，对准200 s后输出横摇角和俯仰角误差在7以内，航向角误差在1.5'以内。实验结果充分证明了惯性系对准可以满足在短时间内输出姿态角达到一定精度范围的要求，具有良好的工程应用价值。
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| 关 键 词： | 激光陀螺 惯性系? 收敛时间 摇摆实验 |
| 收稿时间： | 2013-06-17 |
Fast alignment of mechanically dithered ring laser gyro SINS system |
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| Affiliation: | 1.College of Optoelectronic Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | For study of the 90-type mechanically dithered ring laser gyro SINS system which is self-developed by the authors' department, this article detailed analyzed the convergence time and alignment precision of inertial alignment on static base and swing base. Theoretical analysis shows, the value of the alignment time should basis on the IMU accuracy, settings of the algorithm parameter and the disturbance situation. Through a large number of experiment, on static base, it takes 150 s for the heading angle reaches a steady state value, and then the oscillation amplitude of the roll angle and pitch angle are lower than 1.5, the heading angle oscillating is within 1'; on swing base, after 200 s, the error of the roll angle and pitch angle are lower than 7, the error of heading angle is within 1.5'. Results confirm that the inertial alignment can meet the requirement of reaching a certain attitude angle accuracy range within a short time, and can be well used in engineering applications. |
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