机载雷达综合显示器的仿真实现

雷达综合显示器是一种能够灵活地把雷达一次信息、二次信息、地图背景和各种表格数据综合在同一个显示界面进行显示的雷达终端系统,可以形象地提供雷达威力范围内比较全面的综合信息。本文对应用Visual C＋＋程序设计来实现航空机载雷达综合显示器的仿真问题进行了探讨。     

可重复使用飞行器末端能量管理段轨迹和制导研究

采用Bernoulli螺旋线来描述航向调整圆锥在水平面中的投影,以此为基础建立了可重复使用飞行器在航向调整段的动力学和运动学模型,提出了一种根据末端能量管理段起始点水平面位置和飞行器的能量/航程比动态来生成航向调整圆锥的方法,以及航向调整段和捕获段的制导方法;数字仿真结果表明,本文提出的轨迹设计和制导方法可以使可重复使用飞行器以自动着陆界面要求的速度和高度对准跑道,实现飞行器安全降落。     

Modeling of LEO orbital debris populations for ORDEM2008

The NASA Orbital Debris Engineering Model, ORDEM2000, is in the process of being updated to a new version: ORDEM2008. The data-driven ORDEM covers a spectrum of object size from 10 μm to greater than 1 m, and ranging from LEO (low Earth orbit) to GEO (geosynchronous orbit) altitude regimes. ORDEM2008 centimeter-sized populations are statistically derived from Haystack and HAX (the Haystack Auxiliary) radar data, while micron-sized populations are estimated from shuttle impact records. Each of the model populations consists of a large number of orbits with specified orbital elements, the number of objects on each orbit (with corresponding uncertainty), and the size, type, and material assignment for each object. This paper describes the general methodology and procedure commonly used in the statistical inference of the ORDEM2008 LEO debris populations. Major steps in the population derivations include data analysis, reference-population construction, definition of model parameters in terms of reference populations, linking model parameters with data, seeking best estimates for the model parameters, uncertainty analysis, and assessment of the outcomes. To demonstrate the population-derivation process and to validate the Bayesian statistical model applied in the population derivations throughout, this paper uses illustrative examples for the special cases of large-size (>1 m, >32 cm, and >10 cm) populations that are tracked by SSN (the Space Surveillance Network) and also monitored by Haystack and HAX radars operating in a staring mode.     

基于IFM技术的捷变频雷达综合测试仪

介绍了一种基于瞬时测频(IFM)技术的非相参捷变频雷达综合测试仪的设计方法.应用该仪器可以在捷变频状态下对捷变频雷达导引头进行各种性能测试,解决了捷变频雷达导引头不能在捷变频状态下进行测试的难题.     

基于弹道制导一体化的巡航飞行器末制导方案研究

以巡航飞行器为对象,重点研究高精度末制导方案。考虑到超声速飞行器制导设计与弹道设计及单机指标确定之间的紧密耦合关系,进行弹道制导一体化设计,提出弹道设计的关键点要求及导引头开机方案和要求,并通过控制系统六自由度仿真试验验证方案设计的有效性,为后续工程研制奠定了理论基础。     

Integrated guidance and control design of a flight vehicle with side-window detection

This paper considers the guidance and control problem of a flight vehicle with side-window detection. In order to guarantee the target remaining in the seeker's sight of view, the line of sight and the attitude of the flight vehicle should be under some constraints caused by the side-window, which leads to coupling between the guidance and the attitude dynamics model. To deal with the side-window constraints and the coupling, a novel Integrated Guidance and Control (IGC) design approach is proposed. Firstly, the relative motion equations are derived in the body-Line of Sight (LOS) coordinate system. And the guidance and control problem of the flight vehicle is formulated into an IGC problem with state constraints. Then, based on the singular perturbation method, the IGC problem is decomposed into the control design of the quasi-steady-state subsystem and the boundary-layer subsystem which can be designed separately. Finally, the receding horizon control is applied to the control design for the two subsystems. Simulation results show the effectiveness of the proposed approach.     

终端角度约束制导及制导控制一体化方法综述

针对制导武器终端角度约束下的制导方法和制导控制一体化方法进行综述。首先，对比分析了几种典型的终端角度约束定义，针对二维、三维交战场景构建了面向终端角度约束的制导及制导控制一体化设计的状态空间模型；其次，针对终端角度约束下的制导方法以及制导控制一体化设计方法进行分类、归纳总结与对比；最后，针对终端角度约束制导和制导控制一体化设计中存在的多约束落角控制、信息估计、落角范围估计、协同制导等问题进行了展望。     

Three-dimensional time-varying sliding mode guidance law against maneuvering targets with terminal angle constraint

This paper deals with the problem of intercepting maneuvering targets with terminal angle constraints for missiles subjected to three-dimensional non-decoupling engagement geometry.To achieve the finite-time interception and satisfactory overload characteristics, a time varying sliding mode control methodology is developed based on a time base generator function. The main feature of the proposed guidance law guarantees the Line-of-Sight(LOS) angles to converge to small neighborhoods of the desir...