SINS／GPS组合系统的蒙特卡洛仿真

以考虑位置误差相关项的伪距率观测模型，对遥感中使用的SINS/GPS为距、伪距率组合系统进行了蒙特卡洛仿真。结果表明，组合系统的长期位置精度能达到5m以内；GPS数据更新率低于SINS，在GPS测量时间间隔内，组合系统的性能仅由SINS决定，虽然SINS的误差随时间积累，但在GPS测量时间间隔为秒数量级的情况下，即使采用中等精度的惯性的误差随时间积累，但在GPS测量时间间隔为秒数量级的情况下，即使采用中等精度的惯性仪表，其相对位置精度可达到厘米级（这里相对位置精度指组合系统在GPS测量时间间隔内位置误差的变化范围）。

SIMULATION OF SINS/GPS INTEGRATED NAVIGATION SYSTEM

The main aim using SINS/GPS integrated system in navigation is to improve long-term accuracy. For remote sensing application, both long-term accuracy and short-term accuracy are important. The SINS/GPS pseudo-range and pseudo-range rate integrated navigation system are studied based on the precise model of pseudorange rate in which position error is concerned in this paper. Simulation results show that the long-term position error of integrated system is within 5 meters. If the middling accuracy inertial instrument is used, the relative change of position error in the time interval of GPS measurement is centimeter level.