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针对考虑交接班误差的重复使用运载器(RLV)无动力自动进场着陆段轨迹设计问题进行了研究。将整个自动进场着陆过程分成交接段、标称下滑段和标称拉平段3个阶段。在依据标称交接班状态、触地状态逆序完成拉平段、下滑段的标称轨迹设计的前提下,针对可能存在的交接班误差,提出一种综合考虑纵、侧向位置和速度交接班误差的交接段在线三维轨迹设计方法,并结合阻力舵调整策略,实现RLV从交接班点向标称轨迹的平滑过渡;然后,在交接段轨迹设计基础上提出了交接高度平面内“安全交接区域(SIA)”的概念及其求解方法。仿真结果表明:所提出的轨迹设计方法及SIA对存在交接班误差的无动力进场着陆轨迹设计问题具有实际的参考意义。
In this paper, the design of trajectory of landing section of unpowered automatic approach for RLV (Reusable Launcher) is studied. The whole process of automatic approach landing is divided into the delivery section, the nominal sliding section and the nominal stage of leveling three stages. Based on the nominal shift status and the ground contact reverse order to complete the nominal trajectory design of the leveled section and the glide section, aiming at the possible shift error, And the method of adjustment of resistance rudder is adopted to realize the smooth transition of RLV from the transfer point to the nominal track. Then, based on the trajectory design of the transfer section, a new concept of “safe handover area (SIA) ”and its solution. The simulation results show that the proposed trajectory design method and SIA have practical reference significance for the design of landing trajectory without power approach with handover error.