Initial Alignment Algorithm Based on the DMCS Method in Single-Axis RSINS with Large Azimuth Misalignment Angles for Submarines.
Initial Alignment Algorithm Based on the DMCS Method in Single-Axis RSINS with Large Azimuth Misalignment Angles for Submarines.
复制标题
基于DMCS方法的潜艇大方位角单轴RSINS初始对准算法
DOI：
10.3390/s18072123
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发表时间：
2018-07-02
期刊：
影响因子：
--
通讯作者：
Sun Q
中科院分区：
文献类型：
--
作者：
Xia XW;Sun Q
由于旋转调制技术（RMT）可以有效地调制惯性传感器的误差，旋转式捷联惯导系统（RSINS）在潜艇上得到了广泛的应用，以满足高精度、长时间工作的要求。初始对准性能是影响捷联惯导系统精度的主要因素。传统的基于罗盘法的初始对准算法在失准角较大的情况下性能较差，会使潜艇在复杂的作战环境中无法正常发射。由于RSINS使用数学平台来计算导航信息，因此它允许多个算法同时运行，并且不同算法之间不相互影响。为此，为了提高对准精度，提出了一种基于双数学计算系统（DMCS）的初始对准算法，并针对方位失准角较大的问题，提出了一种改进的基于DMCS的对准算法。仿真和实验结果表明，该算法能有效改善大失准角环境下的初始对准性能，增强了RSINS的环境适应性。
Since the inertial sensor error has been modulated effectively by the Rotation Modulation Technique (RMT), the Rotation Strapdown Inertial Navigation System (RSINS) has been widely used for submarines in order to satisfy the requirement of high-accuracy and long working duration. The performance of the initial alignment is main factor affecting the accuracy of the Strapdown Inertial Navigation System (SINS). The traditional initial alignment algorithm based on the compass method has bad performance when the misalignment angle is large, which will make the submarine SINS fail to launch properly in a complex operating environment. Since the RSINS uses the mathematical platform to calculate the navigation information, it allows multiple algorithms to run simultaneously, and different algorithms do not interact with each other. Thus, to improve the alignment accuracy, an initial alignment algorithm based on the Dual Mathematical Calculation System (DMCS) is proposed; moreover, to solve the problem of large azimuth misalignment angle, an improved DMCS-based alignment algorithm is also presented in this paper. Both simulations and experiments showed that the novel algorithm can effectively improve the initial alignment performance under the large misalignment angle environment, enhancing the environmental suitability of the RSINS.
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