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为了研究GPS/INS(Inertial Navigation System)组合导航方案和算法,设计了一种GPS中频信号和IMU(Inertial Measurement Unit)信号的软件模拟器.首先建立了载体的运动模型,然后介绍了信号的仿真方法.根据载体的运动产生IMU信号,载体的典型运动包括平飞运动、横滚运动、俯仰运动和偏航运动.建立了典型的干扰模型,包括欺骗式干扰和压制式干扰(窄带干扰、宽带干扰、连续波干扰和锯齿调频连续波干扰等4种),实现了干扰环境下的场景模拟.GPS/INS组合导航软件接收机对模拟器输出的数据进行解算,结果表明:信号的仿真算法是正确的,模拟器可以为组合导航接收机提供有效的中频信号和IMU信号.
In order to study the integrated navigation scheme and algorithm of GPS / INS (Inertial Navigation System), a software simulator of GPS intermediate frequency signal and IMU (Inertial Measurement Unit) signal is designed.Firstly, the motion model of the carrier is established and then the signal simulation Methods The IMU signals are generated according to the motion of the carrier, and the typical motions of the carrier include flat-fly, roll, pitch and yaw motions. Typical interference models are established, including deception and suppression (narrow band interference, Interference, continuous wave interference and sawtooth frequency modulation continuous wave interference, etc.) to realize the scene simulation in interference environment.GPS / INS integrated navigation software receiver solves the data output by the simulator, the results show that: the signal simulation algorithm Is correct, the simulator can provide a combined IF receiver with an IF signal and an IMU signal.