摘要
针对高超声速滑翔式再入飞行器轨迹优化和制导关键技术,设计了一种新型的最优滑翔制导律。首先,通过对再入飞行器运动学、动力学状态变量变化特点的假定,将其进行三个快慢时间尺度的划分;然后,应用最优控制理论分别求解三个不同时间尺度上的子问题,得到其解析解;在此基础上,基于奇异摄动方法,设计出具有闭环反馈形式的最优滑翔制导律;最后,对所求制导律的有效性进行了数学仿真验证。仿真结果表明:该制导律能在三维空间内导引再入飞行器朝目标方向最远距离滑翔飞行;该算法得出的闭环解析解满足制导过程中实时计算需求,具有工程应用前景。
A novel optimal glide guidance law was proposed for the purpose of developing the reentry trajectory optimization and guidance technology of a hypersonic glide-reentry vehicle. First, three time- scales separations were established based on the assumptions of the behaviors of state variables for a reentry vehicle. Then, through solving the three sub-problems by optimal control theory, analytical solutions were derived. Furthermore, the closed-loop optimal glide guidance law （COGGL） was created based on the singular perturbation method. Finally, the validity of the proposed guidance law was verified through numerical simulations. The results demonstrate that the COGGL assures maximum- range glide of the reentry vehicle for a three dimensional intercept. Also, the COGGL is potential to apply in engineering, because its closed-looo analytical solutions meet the need of onboard real-time calculations.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2013年第2期307-312,共6页
Journal of System Simulation
关键词
再入飞行器
奇异摄动
最优制导律
高超声速滑翔
三维
reentry vehicle
singular perturbation
optimal guidance law
hypersonic glide
threedimensional
