基于轨迹欺骗的无人机GPS/INS复合导航系统干扰技术

摘要

Based on the analysis of the principle of GPS deception jamming,the control characteristics of unmanned aerial vehicle (UAV) GPS/INS integrated navigation system are considered and the innovative detection rule of state estimation in UAV navigation system is designed.Methods of direct trajectory cheating and trajectory fusion are adopted to achieve the UAV navigation system intrusion control and realize the purpose of UAV flight path control with the GPS deception jamming.In this paper,the normalized innovation squared is given through theoretical derivation and simulation analysis.The results show that when the control method of trajectory fusion is adopted,not only the trajectory deception can be realized,but also it is difficult to be detected,which provides an effective means of interference for GPS confrontation.%在分析GPS欺骗干扰原理基础上,结合无人机(Unmanned aerial vehicle,UAV) GPS/INS复合导航系统的控制特点,设计了无人机导航系统中状态估计量的创新检测规则.采用直接轨迹欺骗与轨迹融合两种方法,实现了对无人机导航系统的侵入控制,达到了利用GPS欺骗干扰实现对无人机飞行轨迹进行控制的目的.通过理论推导和仿真分析给出了两种控制模式下归一化新息平方(Normalized innovation squared,NIS),指出当采用轨迹融合的控制方法时,不仅可实现无人机的轨迹欺骗,而且不易被检测,为GPS对抗提供了有效的干扰手段.