基于模糊理论的微分对策制导律

在现代战场环境下，导弹制导所需信息经常受到各种干扰，有时甚至是不确定的。而基于精确模型的微分对策制导律的实时实现面临着许多困难。为解决这个问题，尝试将模糊理论与微分策制导律相结合，采用多级模糊控制规则，以导弹怀收音机格半为例，给出了模型的建立方法，并探讨了这种模糊微分对策制导律实现的可行性和优点，为将来发展基于微分对策理论的智能制导律提供了一定的思路。     

Cooperative differential games guidance laws for multiple attackers against an active defense target

This paper is concerned with a scenario of multiple attackers trying to intercept a target with active defense. Three types of agents are considered in the guidance: The multiple attackers, the target and the defender, where the attackers aim to pursuit the target from different directions and evade from the defender simultaneously. The guidance engagement is formulated in the framework of a zero-sum two-person differential game between the two opposing teams, such that the measurements on the m...     

Optimal guidance against active defense ballistic missiles via differential game strategies

The optimal guidance problem for an interceptor against a ballistic missile with active defense is investigated in this paper.A class of optimal guidance schemes are proposed based on linear quadratic differential game method and numerical solution of Riccati differential equation.By choosing proper parameters, the proposed guidance schemes are able to drive the interceptor to the target and away from the defender simultaneously.Additionally, fuel cost, control saturation,chattering phenomenon a...     

基于层次评估理论的弹道导弹末段突防制导律研究

针对弹道导弹末段突防问题,应用层次性能评估体系,对弹道导弹末段典型突防制导律进行对比分析.并通过对弹道导弹制导精度、弹道导弹最大过载、弹道飞行时间和反导导弹脱靶量以及它们的均值、均方差的重要性和需求性分析,合理设置评估体系的指标及其权值,应用随机仿真分析方法,对比仿真经典比例导引、修正比例导引和变结构比例导引三种突防制导律的性能.仿真结果证明,层次评估理论可以用于弹道导弹末段突防制导律的评估及优选.     

一种适用于大气层外动能拦截器的末制导律

 针对大气层外动能拦截器拦截问题,设计了一种简单有效的末制导律。推导出计算零控脱靶量一种新的解析表达式,由于在推导过程中考虑了两飞行器间重力差影响,得出的表达式相对于将两飞行器重力差简化为零重力模型得到的解析式具有更高的精度;根据平行接近法原理利用此表达式推导出一种简单的末制导律;详细介绍了脉宽调制(PWM)式实现变推力控制的方案,仿真中在考虑发动机工程约束的情况下,利用PWM技术对提出的制导律进行验证。对机动目标进行拦截仿真显示,提出的制导律在取得良好拦截精度的同时表现出较强的鲁棒性。     

基于时间权函数的落角约束导引律中剩余时间的估计方法

带导弹落角约束的导引律求解需要已知导弹飞行剩余时间。针对弯曲弹道,一般的剩余时间估计方法精度较低,在假设导弹速度一定的前提下,采用n阶多项式函数近似表示剩余路径,给出了一种基于近似闭环轨迹的实用剩余时间估计方法。仿真结果表明,剩余时间估计精度平均提高了13倍以上,且计算量可以满足实时性要求。     

An online data driven actor-critic-disturbance guidance law for missile-target interception with input constraints

In this article, we develop an online robust actor-critic-disturbance guidance law for a missile-target interception system with limited normal acceleration capability. Firstly, the missiletarget engagement is formulated as a zero-sum pursuit-evasion game problem. The key is to seek the saddle point solution of the Hamilton Jacobi Isaacs(HJI) equation, which is generally intractable due to the nonlinearity of the problem. Then, based on the universal approximation capability of Neural Networks(N...     

Three-dimensional cooperative guidance strategy and guidance law for intercepting highly maneuvering target

Cooperative interception of the target with strong maneuverability by multiple missiles with weak maneuverability in the three-dimensional nonlinear model is studied. Firstly, the three-dimensional nonlinear model of cooperative guidance is established. The three-dimensional reachable region is represented composed of lateral acceleration and longitudinal acceleration in the two-dimensional coordinate system. Secondly, the problem of the multiple missile's reachable coverage area is transformed into the problem of cooperative coverage. A cooperative coverage strategy is proposed and an algorithm for quickly calculating the number of required missiles is designed. Then, the guidance law based on the cooperative coverage strategy is proposed, and it is proved that cooperative interception of the target can be achieved under the acceleration limit. Moreover, the relations among the number of missiles, the initial array position of terminal guidance and the coverage area of the target’s large maneuver are analyzed. The dynamic adjustment strategy of guidance parameters is proposed to reduce the guidance error. Finally, simulation results show that multiple missiles with low maneuverability can achieve effective interception of target with strong maneuverability through the proposed cooperative strategy and cooperative guidance method.     

Modified rolling guidance law for single moving mass controlled reentry vehicle against maneuvering target with impact angle constraints

This paper deals with the problem of guidance law design for the single moving mass controlled reentry vehicle when impact angle constraints and maneuvering target are taken into consideration. More specifically, a modified rolling guidance law is proposed with the interactive virtual target and the landing point prediction strategy. First, considering the fact that the roll channel can be controlled directly, the relative motion between the single moving mass controlled reentry vehicle and the ...     

Evasion guidance algorithms for air-breathing hypersonic vehicles in three-player pursuit-evasion games

In practical combat scenario, the cooperative intercept strategies are often carefully designed, and it is challenging for the hypersonic vehicles to achieve successful evasion. Based on the analysis, it can be found that if several Successive Pursuers come from the Same Direction(SPSD) and flight with a proper spacing, the evasion difficulty may increase greatly. To address this problem, we focus on the evasion guidance strategy design for the Air-breathing Hypersonic Vehicles(AHVs) under the S...     

基于自适应动态规划的反高超武器微分对策制导律

随着各国高超声速技术的武器化进程加快,对反高超声速武器拦截技术的研究也不断深入,高超声速 武器高速度、大范围主动博弈突防的拦截制导问题成为拦截制导律设计领域的研究热点。针对具有主动博弈突防能力的高超声速目标拦截场景进行微分对策问题建模,并采用基于双启发式的自适应动态规划算法,对连 续非线性系统的微分对策纳什均衡解进行求取;通过 Matlab数字仿真对设计的拦截制导方法进行验证。结果 表明:相较于最优滑模制导律,基于自适应动态规划的微分对策制导律对目标的逃逸机动具有更强的适应性, 能够获得更高的拦截精度。     

Virtual target guidance-based distributed model predictive control for formation control of multiple UAVs

The paper proposes a Virtual Target Guidance(VTG)-based distributed Model Predictive Control(MPC) scheme for formation control of multiple Unmanned Aerial Vehicles(UAVs).First, a framework of distributed MPC scheme is designed in which each UAV only shares the information with its neighbors, and the obtained local Finite-Horizon Optimal Control Problem(FHOCP) can be solved by swarm intelligent optimization algorithm.Then, a VTG approach is developed and integrated into the distributed MPC scheme...     

三维空间拦截的前置追踪变结构制导律(英文)

This article aims to develop a head pursuit （HP） guidance law for three-dimensional hypervelocity interception, so that the effect of the perturbation induced by seeker detection can be reduced. On the basis of a novel HP three-dimensional guidance model, a nonlinear variable structure guidance law is presented by using Lyapunov stability theory. The guidance law positions the interceptor ahead of the target on its tlight trajectory, and the speed of the interceptor is required to be lower than that of the target, A numerical example of maneuvering ballistic target interception verifies the rightness of the guidance model and the effectiveness of the proposed method.