基于EKF的双机协同无源定位算法研究  

Research on Dual Aircraft Collaborative Passive Positioning Algorithm Based on EKF

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作  者:邬子敬 高士金 WU Zijing;GAO Shijin(Shenyang Aircraft Design&Research Institute,Shenyang 110035,China)

机构地区:[1]沈阳飞机设计研究所,辽宁沈阳110035

出  处:《飞机设计》2024年第6期53-60,共8页Aircraft Design

摘  要:实时侦察敌方目标是取得情报信息的重要手段,而双机协同定位是侦察目标的核心。由于能够利用有限的测量信息实现对目标的定位解算,双机测向交叉(AOA)定位体制的应用十分广泛。由于该定位体制较低的目标观测维度,会使得目标的定位误差较大,因此研究优化定位算法提升精度具有重要意义。文中首先介绍了双机AOA定位模型,并基于到达角和三角关系构建目标方程。然后建立目标运动状态方程和量测方程,利用扩展卡尔曼滤波(Extended Kalman Filter,EKF)算法将非线性的双机AOA定位模型转化为线性问题,实现低误差定位。通过MATLAB仿真分析,对比EKF与传统最小二乘算法解算结果,得到所提出的双机协同无源定位算法具备更低的定位误差的结论。最后对影响目标定位精度的因素进行仿真分析,分析测向误差、载机自身定位误差、载机与目标运动速度以及空间构型等不同影响条件下目标定位收敛精度曲线的趋势,对双机协同侦查定位的工程实现提供一定的参考。In the new generation of war,intelligence information is the key to victory,real-time reconnaissance on enemy targets is an important means of obtaining intelligence information,and dualaircraft coordinated positioning is the core of reconnaissance targets.The two-machine Angle Of Arrival(AOA)Positioning regime is widely used because it can use limited measurement information to achieve the Positioning solution of the target.Due to the lower target observation dimension,the target positioning error is larger,so it is important to study the optimised positioning algorithm to improve the accuracy.For the dual-machine AOA positioning model,the target equation is constructed based on the angle of arrival and the triangular relationship.Then,the target motion state equations and measurement equations are derived,and the nonlinear dual-aircraft AOA positioning model is transformed into a linear problem using the Extended Kalman Filter(EKF)algorithm to achieve low error positioning.Through MATLAB simulation analysis and comparison of EKF and traditional least squares algorithm results,it is concluded that the proposed dual machine cooperative passive positioning algorithm has lower positioning error.Finally,simulation analysis is conducted on the factors that affect the accuracy of target positioning.By analyzing the convergence accuracy curve of target positioning under different influencing conditions such as direction finding error,carrier positioning error,c arrier target motion speed,a nd spatial configuration,a certain reference is provided for the engineering implementation of dual machine collaborative reconnaissance positioning.

关 键 词:双机协同 无源定位 AOA EKF 

分 类 号:V219[航空宇航科学与技术—航空宇航推进理论与工程]

 

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