在天文/惯性组合导航系统中,当星体跟踪器集成安装在惯性测量组件上时,惯导调制过程与天文测星过程会存在冲突,多次测星后,会激励较大舒勒振荡,引起系统水平姿态误差变大。提出了一种测星/调制综合控制技术,将测星对称设计在双轴调制过程中,解决因测星不对称引起速度误差变大的问题。仿真结果表明,惯性水平基准舒勒振荡误差减少20%,验证了该方法的可行性和有效性。

When astral tracker is integrated with inertial measurement uints in CNS/INS integrated navigation system, there exists the conflict of inertial modulation process and astronomical star-measurement process, which can impel larger Schuler oscillation and result in increasing systemic attitude errors after repeatedly measuring stars. A kind of technology called star-measurement/modulation integrated control is proposed. The astronomical star measurement is configured into the biaxial modulation process, and it can solve the problem that the velocity error becomes larger caused by asymmetric star measurement. The simulation test result demonstrates that Schuler oscillation under the inertial horizontal datum can be reduced by 20%, which verifies the feasibility and effectiveness of this program.