测量船用捷联惯导动基座快速粗对准技术

Dynamic rapid course alignment for measurement ship SINS

针对测量船用捷联惯导系统(strapdown inertial navigation system,SINS)粗对准问题,对比分析了传统解析法和惯性系粗对准法的本质区别与适用范围,利用惯性系对准过程是动态过程的性质,提出在SINS中引入惯性系粗对准法并进行理论推导与分析。模拟测量船典型三轴摇摆状态下对SINS惯性系粗对准过程进行仿真分析,并与传统解析粗对准结果比对。选取测量船的系泊状态建立试验环境并得到实验结果:惯性系对准方法可建立更为准确的捷联矩阵,惯性系对准结果具有更好的稳定性。

According to the problem that it is difficult to achieve the coarse alignment when the measure- ment ship is on a swing base. The essential distinction and applicability between the analytic coarse alignment and the inertial coarse alignment are analyzed contrastively. Based on the nature of the inertial coarse alignment is a dynamic process, the inertial coarse alignment is quoted in the strapdown inertial navigation system （SINS）, the theoretical derivation and the mathematical analysis are also presented. The process of coarse alignment is analysed on the typical three-axial swing, and the resuhs are compared with the situation of tradi tional course alignment. The mooring experiment is used to validate the {easibility of the inertial alignment method. The results show that when the measurement ship is on the swing state, the strapdown matrix can be built exactly. Compared with the traditional analytical inertial alignment, the inertial alignment has a better sta- bilization.