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现代民机的惯性导航系统输出的导航参数多,自主性强,但误差随时间积累,而陆基无线电导航系统定位精度不受使用时间的影响,但易受周围环境、电磁干扰等外界噪声和接收机噪声的影响。综合两种导航系统的优点,本文提出了基于导航性能评估的INS/RADIO组合导航方案。根据当前组合模式的传感器输出计算出实际导航性能(ANP),然后同导航数据库中预先设定的导航性能需求(RNP)进行比较,筛选出符合RNP的台站,并从中选择出精度最高的组合模式,最终完成位置输出。仿真结果表明,INS/RADIO组合导航能有效抑制无线电的位置噪声,由于导航性能评估的参与导航系统的位置精度得到进一步提高。
The inertial navigation system of modern civil aircraft has many navigation parameters and strong autonomy, but the error accumulates over time. However, the localization accuracy of land-based radionavigation systems is not affected by the use time, but is sensitive to ambient noise such as ambient and electromagnetic interference and Effect of receiver noise. Combining the advantages of the two navigation systems, this paper proposes INS / RADIO integrated navigation solution based on navigation performance evaluation. The actual navigation performance (ANP) is calculated from the sensor output of the current combined mode and then compared with the pre-set navigation performance requirements (RNP) in the navigation database to screen RNP-compliant stations and select the highest-precision combination Mode, the final position output. The simulation results show that INS / RADIO integrated navigation can effectively suppress the position noise of the radio, and the position accuracy of the participating navigation system is further improved due to the performance evaluation of navigation.