游移方位捷联惯导系统软件测试与仿真

用C语言实现了游移方位捷联惯导系统的实时软件仿真;分别以圆球和参考旋转椭球体作为地球模型进行导航参数计算;用圆球模型下的飞行轨迹数据对圆球模型,椭球模型,加惯性元件误差的椭球模型下的捷联惯导系统导航参数进行测试;提出将速度通道和高度通道联立求解的方法.以提高速度,高度计算的准确性;并解决了导航参数解算中出现的计算周期同步问题;分析了误差来源,比较了圆球和参考旋转椭球体之间的差异;验证了该惯导系统仿真的正确性,证明了该测试方法的可行性。

Measurement and Simulation of Wander Azimuth Strapdown Inertial Navigation System

Simulation of wander-azimuth strapdown inertial navigation system using sphere earth model and ellipsoidal and rotating earth model was done with C program.Navigation data of sphere earth model,ellipsoidal earth model and ellipsoidal earth model with the er- ror of inertial component was measured with the flight orbit data of sphere earth model.The accuracy of velocity and altitude was enhanced by simultaneous equations of velocity and altitude.The synchronization of calculate period was solved.The errors of simulation with sphere and ellipsoidal earth model were analyzed and compared.The tests reveal the correctness of simulation and the feasibility of measurement.