空间平台下传递对准方案

Transfer Alignment on Space Platform

提出了惯性坐标系下空间平台主惯导与有效载荷子惯导之间的传递对准方案。首先,介绍了惯性坐标下捷联惯导系统算法及其流程图。然后,推导了惯性坐标系下的传递对准状态方程,包括捷联惯导系统误差方程以及姿态失准角模型方程;推导了传递对准姿态匹配量测方程。最后,给出了传递对准最优状态方程和降阶状态方程,并且讨论了仿真流程和仿真环境;传递对准仿真结果表明,在10s时间内,在给定的机动条件下,子惯导与主惯导的失准角估计精度在1′以内。

Transfer alignment of slave inertial navigation system （INS） and the master INS on space platform was presented. Firstly, the navigation algorithms of the master and slave INS in J2000 inertial frame were introduced, and we gave the block diagram of the algorithms. Then, we derived the state equations of transfer alignment model, which include the error equations of slave INS and the equations of misalignment vector between the master INS and the slave INS. The attitude-match measurement equations were also derived. Finally, we obtained the optimal state equations of transfer alignment and the reduced-order state equations. The block diagram of transfer alignment showed the simulation methods. The simulation results show preliminarily that the misalignment vector precision is less than 1 are second under the proper maneuver condition in 10 minutes.