摘要
目标运动参数估计方法直接影响导弹的制导精度。本文对制导参数的估计方法进行了研究,首先建立速度-转向-爬升坐标系,基于此坐标系对目标的加速度在三个坐标轴上的分量分别进行估计,由此将三维问题转化为一维问题来处理;其次,基于当前统计模型提出一种九状态重力转弯(Grivity Turning,GT)模型,利用预解矩阵法对九状态GT模型进行离散化,同时根据脉冲多普勒雷达导引头的特点,建立了雷达导引头的观测方程;最后,结合UKF滤波算法对制导参数进行估计。仿真结果表明,设计的方法对目标机动反应较为灵敏,具有较好的跟踪稳定性和收敛性,制导参数的估计精度满足制导律的基本要求。
The moving target parameter estimation algorithm affects the guidance precision directly.This paper studies the estimation method of guidance parameters.Firstly,the velocity-turn-climb(VTC)coordinate system is built.Based on this,the components of target acceleration on three axes are estimated,as a result,the problem of the acceleration in three dimensional can be translated into one dimensional problem.Secondly,the nine state gravity turning(GT) model of target maneuvering is proposed based on the concept of current statistics model,and the discretization of state model is calculated using predictive matrix method.Then,according to the characteristics of pulse Doppler radar seeker,the radar seeker measurement model is given.Finally,the UKF filtering algorithm is used to estimate the guidance parameters.The simulation results show that the designed method is sensitive to the target maneuvering response,and has better tracking stability and convergence.The estimation accuracy of the guidance parameters meets the basic requirements of the guidance law.
出处
《航空兵器》
2017年第6期18-24,共7页
Aero Weaponry
基金
国家自然科学基金项目(61773398
61703421)
航空科学基金项目(20150196006)
