CAJ | 학술논문

基于末端弹道小机动、平稳特点,采用质点弹道模型描述目标的运动,结合非线性不敏卡尔曼滤波算法(Unscented Kalman Filter,UKF)对雷达量测数据进行滤波及弹道参数估计。根据现实需要,由某一时刻滤波得到的目标位置、速度和弹道系数进行外推计算。计算结果表明,对于飞行马赫数为1~3的来袭目标,外推2s 目标空间位置绝对误差可以稳定控制在10 m左右。考虑到雷达对目标的径向速度测量数据较为精确的特点,提出了一种基于最小二乘拟合和充分利用径向速度数据的计算方法,确定了目标外推初始边界条件。计算过程和结果表明,该方法具有更快的计算速度和更好的计算精度。
기우말단탄도소궤동、평은특점,채용질점탄도모형묘술목표적운동,결합비선성불민잡이만려파산법(Unscented Kalman Filter,UKF)대뢰체량측수거진행려파급탄도삼수고계。근거현실수요,유모일시각려파득도적목표위치、속도화탄도계수진행외추계산。계산결과표명,대우비행마혁수위1~3적래습목표,외추2s 목표공간위치절대오차가이은정공제재10 m좌우。고필도뢰체대목표적경향속도측량수거교위정학적특점,제출료일충기우최소이승의합화충분이용경향속도수거적계산방법,학정료목표외추초시변계조건。계산과정화결과표명,해방법구유경쾌적계산속도화경호적계산정도。
Based on the non-maneuvering characteristics of the terminal traj ectory missiles,the particle ballistic model was used to describe the motion properties of target.Combined with nonlinear unscented Kalman filter algorithms,the ballistic parameters were estimated by filtering the radar data.According to needs,the extrapolation of traj ectory was carried out by the data of target location,velocity and traj ectory coefficient at a certain time.The calculation results show that,for a target with Mach number of 1~3,2 s extrapolation of the spatial position of absolute error was stabilized at around 10 m.Considering the properties that the radical velocity of target is measured accurately by radar,a new calculation method was proposed to determine the target initial conditions of extrapolation.The calculation process and results show that the new method has faster computation and better accuracy.