ADOP可观测性分析方法在旋转式惯导初始对准中的应用

The Application of ADOP Observability Analysis Method in Rotating-INS Initial Alignment

针对旋转式惯导系统多位置初始对准可观测性的问题,对可应用于初始对准方案选择的姿态精度因子(ADOP)可观测性分析方法进行了研究。以惯导初始对准33维状态误差方程为研究对象,分析ADOP方法在旋转式惯导初始对准的转动顺序、停留时间及模型降阶方面的应用。理论分析和仿真结果均表明该方法控制灵活、直观有效,能够为旋转式惯导初始对准应用中最佳方案选择提供依据。

To study the observability of rotating inertial navigation system（INS） ＇s multi-position initial alignment, the ADOP （ Attitude Dilution of Precision） observability analysis methods are discussed in this paper. In order to research the application of ADOP for the best rotation sequence, the best state duration and reduce model order in rotating-INS＇s multi-position initial alignment, the 33-state error model of the INS is taken as its study object. The simulation of initial alignment observability is carded out, the results of theoretical analysis and simulation both show that the method proposed in this paper is intuitive, effective and easy to control, and able to provide the basis for optimal scheme selection.