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Lateral entry guidance with no-fly zone constraint

机译：具有禁飞区约束的侧向进入引导

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No-fly zones are geographic constraints for the atmospheric entry flight. Two lateral guidance methods are presented for the entry flight constrained by multiple no-fly zones. The first method employs a dynamic heading corridor to control the vehicle's velocity heading angle. The corridor is generated based on a chain mode strategy that takes heading limits for all the no-fly zones and the target into account. The dynamic corridor is adaptively updated during the flight according to the vehicle's state and the actual constraints. The second method is designed based on a waypoint vector which is located between each pair of no-fly zones. This waypoint vector contains both the location and the direction constraints for the flight trajectory. The vehicle is capable of flying the avoidance trajectory by passing through one or more expected waypoints in specified directions. The two guidance methods are finally tested in four entry missions constrained by various no-fly zones. Results indicate that these methods are effective for no-fly zone avoidance missions in both the nominal and dispersed cases. (C) 2016 Elsevier Masson SAS. All rights reserved.
机译：禁飞区是大气进入飞行的地理限制。针对被多个禁飞区限制的进场飞行，提出了两种侧向制导方法。第一种方法采用动态航向走廊来控制车辆的速度航向角。走廊是基于链式策略生成的，该策略考虑了所有禁飞区和目标的航向限制。在飞行过程中，动态走廊会根据车辆的状态和实际限制条件进行自适应更新。第二种方法是基于位于每对禁飞区之间的航路点矢量设计的。该航点矢量包含飞行轨迹的位置和方向约束。该车辆能够通过在指定方向上通过一个或多个预期航路点来逃避回避轨迹。两种制导方法最终在受各种禁飞区约束的四个进入任务中进行了测试。结果表明，这些方法对于名义和分散情况下的禁飞区任务都是有效的。 （C）2016 Elsevier Masson SAS。版权所有。

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