多系统组合导航仿真器设计

Design of Multi-system Integrated Navigation

通过分析多种导航系统各自的特点,从对惯性导航系统误差状态的可观测性出发,考虑到校正方式的自由选择、滤波算法的不同采用以及信源的有效性检验等因素,建立了多系统组合导航模型,并采用Simulink工具搭建了该系统仿真器模块。仿真器能够自动地将处于工作状态的导航子系统按照最优准则组合起来,不但能够独立地执行,而且可以与其它导航系统仿真器一起集成在RT-LAB实时环境下正确运行。仿真结果表明,在满足精度的前提下,该系统具有导航信息的冗余性、互补性、容错性等良好性能。

By studying on observable of INS error states and the characteristic of each navigation system,considering the choice of the revision way,the adoption of different filtering algorithms and the verification of the information source,a multi-system integrated navigation model was built.The simulator module of this model was constructed by Simulink tools in MATLAB,which could integrate all active navigation subsystems automatically.The simulator not only could execute independently,but also could run accurately on RT-LAB real-time environment combined with other navigation system simulators.The simulation result indicates that the simulator has many good performances which include the flexibility in integration pattern of navigation systems,the redundancy and complementarity of navigation information,the fault tolerance of the whole system,etc.