比例导引下的机动目标自适应滤波算法研究

Simulation of Maneuvering Target Adaptive Filtering Based on Proportion Guide

针对反舰导弹的快速跟踪问题,在反舰导弹做比例导引运动的基础上,将比例导引规律引入状态方程,建立线性时变模型,实现对系统状态的自适应滤波,运用语言进行仿真计算,分析并得到了在不同的初始航向角、比例导引系数、导弹的初始位置和速度下的导引弹道滤波曲线和弹目相遇时间。仿真结果表明,导弹的运动数学模型是实用而有效的,较准确地反映目标的机动变化;在此基础上的机动目标跟踪模型在原理上是正确的,由此构建的滤波器能够较快地收敛,其跟踪精度较高。

Based on the proportional guide motion of anti - ship missile, the article discusses the problem of maneuvering target tracking through introducing the character of proportion guide into state equation, constructing a linear time - varying modal, estimating parameters of the system, and using the standard Kalman filter with parameters to get the state estimate of the system, and uses matlab language to simulate it. Then it analyzes various conditions of different initial values of voyage direction, proportion guide coefficient, missile＇ s initial location, and velocities, and gets these different guide trajectory filter curves and encountering times of missile and target. The simulation results indicate that the principle is right and the methods are feasible, and the missile motion model can reflect the target maneuvering trajectory. The filter based on missile motion model has better tracking performance.