一种惯导系统航向测量精度的动态评估方法

Dynamic evaluation method of INS course measurement precision

随着舰载武器系统的发展,对惯性导航系统姿态测量精度要求不断提高,因此对惯导系统姿态测量精度的评估与验证成为惯性测试技术中的关键问题之一,特别是针对动态条件下的评定。对此提出了一种惯导系统姿态信息测量精度的动态评估方法,该方法是由差分GPS测量系统、甲板经纬仪、综合测量靶标等设备组成的外测系统来实现。该外测系统通过外测定位数据、速度数据、航向数据与惯导系统相关数据进行比对达到惯导系统精度评估的目的。经过实船验证,该动态评估方法实测结果优于20〞,满足性能指标的要求。该方法的提出有效提高了惯导系统姿态信息的动态评估的效率,具有很好的实际应用价值。

With the development of shipboard weapon system, the INS attitude measurement accuracy is required to be higher and higher. Thus the evaluation and verification of INS course precision become one of the key problems in inertial measurement technology, especially under dynamic conditions. In this paper, a dynamic evaluation method of INS course accuracy is put forward. The method consists of differential GPS measurement system, deck theodolite, and comprehensive target measurement devices such as external measurement system. THE evaluation of INS course accuracy is achieved by the comparison of external positioning data, speed, heading data with INS-related data. Test results show that the course dynamic evaluation accuracy is about 20〞, meeting the performance requirements. The method effectively improves the dynamic assessment efficiency of the INS attitude information.