可重复使用运载器上升段飞行控制

上升段是整个可重复使用运载器任务飞行的初始阶段，这个阶段中飞行器重心、大气环境和运动状态变化较快. 为便于分析整个飞行过程的特性，保证可重复使用运载器在整个飞行过程中具有良好的稳定性与操纵性，该文将上升段分为投放分离段、拉起点火段、动力爬升段和无动力爬升段. 通过分析各段的飞行特点并结合轨迹线性化技术，采取不同的控制策略设计了前馈与反馈控制律，前馈控制用于提高控制系统的非线性跟踪能力，反馈控制增强控制系统的鲁棒性. 非线性仿真结果表明，控制方案能满足上升段的飞行控制要求，实现姿态的快速跟踪.

Control of Ascending Flight of Reusable Launch Vehicles

As the initial flight phase of reusable launch vehicle(RLV),the ascending phase has its special characteristics,that is,fast changes during flight in the gravity center,the atmospheric density and the motion state.The control law should suit the fine stability and maneuverability in the whole flight envelope to make analysis easy.The entire flight is divided into four phases in this paper:drop,ignition,powered climb and unpowered climb.Different control strategies are used according to the characteristic of...