多高超声速飞行器静态协同再入制导方法

为实现多高超声速飞行器的协同再入，提出一种基于参考轨迹的静态协同再入制导方法。首先以实际轨迹长度代替大圆弧假设，研究了实际轨迹长度与总飞行时间的对应关系，提出采用公共轨迹长度作为协调变量的思路；然后设计了一种双层协同框架，其中协调层将轨迹长度作为协调参数进行协调匹配，执行层依据分配的协调参数完成再入飞行；最后针对协同再入的时间一致性要求，提出一种新的协同逻辑转换策略，将终端时间的一致性问题转化为到达截止时间的状态收敛问题。该方法在能量域内进行公共参考轨迹设计，之后通过时域信息提取在时域内完成公共参考轨迹跟踪，最终实现多成员的协同再入。分别在标称状态与模拟扰动环境对所提方法进行了数值仿真，结果表明，所提方法能够简明实现多飞行器的再入协同制导，具有较好的应用潜力。

Static Cooperative Reentry Guidance Method for Multi Hypersonic Vehicles

A static cooperative reentry guidance method is proposed for multi-hypersonic vehicle. Firstly, the relationship between trajectory length and flight time is studied. The idea that common trajectory length can be used as a coordination variable is proposed. Then a two-layer cooperative framework is presented, in which the upper layer is used as the coordination layer, and the lower layer is used as the execution layer to complete the reentry flight. Finally, according to the special requirement of time consistency, a strategy of extracting time-domain information is proposed, which transforms the problem of terminal time consistency into the final state convergence problem. The reference trajectory is designed in the energy domain, and is tracked in the time domain by extracting the information from the energy domain. The proposed method is simulated in nominal state and disturbance environment respectively. The results show that the proposed method can concisely realize the reentry cooperative guidance of multiple aircraft, and has good application potential.