RLV末端能量管理段轨迹优化与纵向控制律设计

Trajectory optimization and longitudinal control for terminal area energy management of reusable launch vehicle

末端能量管理段的目的是控制RLV的能量,使其能够以合适的能量状态进入自动着陆窗口,以保证最终能够安全着陆。重点是满足飞行过程中的物理约束和自动着陆窗口终端约束的轨迹规划和轨迹跟踪。本文首先将轨迹规划转化为优化问题,然后给出能量走廊之内的能量剖面跟踪策略,最后设计纵向轨迹跟踪控制律并进行仿真。仿真结果表明此方法能够设计出合理的下滑轨迹并进行跟踪,跟踪精度较高。

Managing the energy of reusable launch vehicle（RLV） to make it arrive the auto-landing interface and ensure that RLV can land safely, it’s the main purpose of terminal area energy management（TAEM）. The emphases are trajectory programming and tracking that can meet the physical？and auto-landing interface constraints. In this article, trajectory programming is transformed into an optimized problem.Then the trajectory tracking method is built. At last, the trajectory tracking law is designed. The simulations show the method mentioned above can give a reasonable？trajectory with a high tracking precision.