Spacecraft reentry trajectory optimization is a kind of optimal control problem.

飞行器再入轨迹优化是一类最优控制问题。

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Using numerical calculation, optimal roll program, the ratio of lift and drag, reentry Angle and reentry time of spacecraft are gotten.

通过数字计算，得到飞船的最优滚转程序、升阻比、再入角和再入终端时间。

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Spacevehicles such as spacecraft and space shuttle are subjected to severe aerothermal environment with the peak heating at height of 60~90km while they maneuver to reentry the earth's atmosphere.

航天飞行器在再入大气过程中会受到严重的气动加热。返回式卫星、飞船返回舱及航天飞机等采取高空机动再入，再入时间长，其峰值加热过程一般在60-90千米高空。

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Landing is the last stage of reentry of manned spacecraft after the flight mission has been completed.

载入飞船完成飞行任务后，返回着陆是飞行的最后一环，据统计也是事故多发阶段。

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For reentry capsules of spacecraft, making up the trajectory in black-out area is a key link of aerodynamic analysis from flight test data.

对于飞船返回舱，黑障区弹道再现是再人飞行试验气动分析工作的重要环节。

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For reentry capsules of spacecraft, making up the trajectory in black-out area is a key link of aerodynamic analysis from flight test data.

对于飞船返回舱，黑障区弹道再现是再人飞行试验气动分析工作的重要环节。

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