仿真在箔条干扰中的应用

Simulation Modeling for Chaff Jamming

箔条干扰是破坏地面雷达、制导雷达的跟踪系统,使其无法跟踪真实目标,实现干扰。计算机模拟仿真是对箔条干扰实战验证最主要的补充手段之一,其核心是建立数学模型。本文以雷达制导导弹为例,对箔条干扰的仿真数学模型进行探讨,在分析箔条干扰机理的基础上,首先,建立了导弹空间运动模型,分析导弹误差信号的形成和控制的实现,用比例导引法确定导弹的运动特征;其次,根据导弹导引头的参数特性,建立了雷达导引头运动模型,运用该模型,导引头解算出目标的特性(包括位置、速度大小和方向)后,确定跟踪目标;最后,分析箔条诱饵在重力和空气阻力的作用下的运动特性,建立箔条诱饵的运动学、动力学模型,并实现了在大地坐标系和飞机坐标系之间的转换。箔条干扰的实现是系统工程,其中导弹、雷达导引头、箔条诱饵是形成干扰的最主要的要素,在实际应用中,可根据仿真的需求,运用该数学模型,模拟箔条干扰的全过程。

The major objective of chaff jamming is to destroy the tracking system of ground radar and guidance radar, and hide real aim. Computer simulation is one of the major supplemental methods to validate chaff jamming effect in actual combat. This thesis takes radar missile as an example to analyze the mathematic model of chaff jamming simulation. Based on analysis of chaff jamming theory, firstly we set up the model of missile motion in space, studied the formation process of missile error signal and its control method; identified the kinetic characteristics of the missile using scale guidance method. Secondly, based on the parameter characteristics of radar guidance head we created its kinetic model; according to this model worked out the target characteristics of guidance head （including location, speed, and orientation） and identified the tracking aim. Finally, we analyzed the kinetic characteristics of chaff under gravi- tation and air resistance, built up the kinematic and kinetic models of chaff, and realized the transformation between ground coordinate and plane coordinate. Chaff jamming is an integration system, within which missile, radar guidance head and chaff are the major ele- ments to carry out jamming. In practical applications, this simulation model could be used to simulate the whole process of anti -jamming according to simulation demand.