论文部分内容阅读
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。
Aiming at the key techniques of trajectory optimization and guidance of hypersonic gliding reentry vehicles, a new type of optimal glide guidance law is designed. First of all, through the assumptions of the characteristics of kinematics and dynamics of the reentry vehicle, it is divided into three fast time scales. Then, the optimal control theory is used to solve the sub-problems in three different time scales respectively. Based on this, the optimal gliding guidance law with closed-loop feedback is designed based on the singular perturbation method. Finally, the validity of the guidance law is proved by mathematical simulation. The simulation results show that the guidance law can guide the reentry vehicle to glide in the direction of the target for the most distance in three-dimensional space. The closed-loop analytical solution obtained by the algorithm meets the real-time calculation requirements in the guidance process and has the prospect of engineering application.