The current emergency landing site for manned spacecraft of China was designed accord-ing to the demands before TG space station, however, the orbit height and inclination will be changed obviously in the phase of China space station. Therefore, it is necessary to analyze the a-daptability of the current emergency landing site. In this paper, the problem of emergency return was analyzed, and the equivalent model of ballistic return was proposed. The math model of site trajectory of spacecraft, borderlines of the emergency landing site, and length of site trajectory in landing site were also proposed, and the criteria of adaptability was constructed. The adaptability of the current emergency landing site was simulated, and the result was verified via STK software. Lastly, the strategy to adjust the current emergency landing site was put forward. The research re-sults of this paper can provide a reference for the emergency landing site setting in the phase of Chi-na space station.%我国现有载人飞船自主应急返回着陆区是按照空间实验室任务阶段之前应急返回需求设计的,在空间站任务阶段,航天器轨道高度和轨道倾角设计范围与前期有较大变化,因此,有必要分析现有自主应急返回着陆区能否满足后续任务需求. 通过进行载人飞船应急返回问题分析,提出了弹道式返回等价分析模型. 构建了星下点轨迹、应急着陆区边界、弹道式返回航程计算等数学模型,形成了适应能力分析判据. 对现有自主应急返回着陆区适应能力进行了仿真,采用STK对仿真结果进行了验证,并给出了着陆区调整的具体建议. 论文研究成果可为我国空间站阶段的应急返回着陆区设置提供参考.
展开▼
