离散相似法在空-空导弹数字仿真中的应用  

Application of discrete similar method to the digital simulation for air-to-air missiles

作　　者：王志刚[1,2] 李伟[1,2] 张宁 

机构地区：[1]西北工业大学航天学院,西安710072 [2]航天飞行动力学技术重点实验室,西安710072

出　　处：《固体火箭技术》2014年第5期600-605,共6页Journal of Solid Rocket Technology

基　　金：上海航天科技创新基金(SAST201203)

摘　　要：为满足空-空导弹火控系统解算攻击区的实时性要求,提出一种新的快速仿真方案。在六自由度弹道模型基础上进行合理有效地简化,基于瞬时平衡假设建立了导弹质心运动方程。采用时域离散相似法将导弹质心运动方程进行了离散化处理。通过传统模型、变步长积分模型、气动系数拟合模型和离散模型的仿真结果比较,表明气动系数拟合模型虽然运算速度最快但仿真精度最差,而离散模型不仅能大幅提高仿真速度,还能保证较高的计算精度,从而为空-空导弹攻击区快速解算提供了一种合理可行的方案。To obtain the real-time calculation of attack area for air-to-air missile, a new method for fast simulation was presen-ted. The six degree of freedom simulation model was simplified effectually. Based on the instantaneous equilibrium assumption, the centroid equations of motion was established. The discrete model was built by using the time discrete similar method. Through com-puter simulation to compare the traditional model, variable step integration model, aerodynamic coefficients fitting model and dis-crete model simulation,results show that the aerodynamic coefficients fitting model provides the fastest but least accurate simulation. Compared to the traditional model,the discrete model can greatly increase the simulation velocity with high precision,which may present a feasible project for rapid resolving of attack area of air-to-air missile.

关 键 词：空-空导弹 瞬时平衡假设 弹道仿真 离散相似法 

分 类 号：V412[航空宇航科学与技术—航空宇航推进理论与工程]