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首页> 外文期刊>Journal of guidance, control, and dynamics >Constrained spacecraft relative motion planning exploiting periodic natural motion trajectories and invariance
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Constrained spacecraft relative motion planning exploiting periodic natural motion trajectories and invariance

机译：利用周期性自然运动轨迹和不变性的受限航天器相对运动计划

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摘要

Spacecraft relative motion planning is concerned with the design and execution of maneuvers relative to a nominal target. These types of maneuvers are frequently used in missions such as rendezvous and docking, satellite inspection, and formation flight, where exclusion zones representing spacecraft or other obstacles must be avoided. The presence of these exclusion zones leads to nonlinear and nonconvex constraints that must be satisfied. In this paper, a novel approach to spacecraft relative motion planning with obstacle avoidance and thrust constraints is developed. This approach is based on a graph search applied to a virtual net of closed (periodic) natural motion trajectories, where the natural motion trajectories represent virtual net nodes (vertices), and adjacency and connection information is determined by conditions defined in terms of safe, positively invariant tubes built around each trajectory. These conditions guarantee that transitions from one natural motion trajectory to another natural motion trajectory can be completed without constraint violations. The proposed approach improves the flexibility of a previous approach based on the use of forced equilibria and has other advantages in terms of reduced fuel consumption and passive safety. The resulting maneuvers, if planned onboard, can be executed directly or, if planned off-board, can be used to warm start trajectory optimizers to generate further improvements.
机译：航天器相对运动计划涉及相对于标称目标的机动设计和执行。这些类型的演习经常用于诸如会合和对接，卫星检查和编队飞行等任务，在这些任务中，必须避免代表航天器或其他障碍物的禁区。这些禁区的存在导致必须满足的非线性和非凸约束。本文提出了一种新的具有避障和推力约束的航天器相对运动计划方法。此方法基于应用于封闭（周期性）自然运动轨迹的虚拟网络的图搜索，其中自然运动轨迹表示虚拟网络节点（顶点），并且邻接关系和连接信息由在安全性，围绕每个轨迹建立的正变量管。这些条件保证了从一个自然运动轨迹到另一自然运动轨迹的过渡可以完成而不会违反约束。所提出的方法基于强制平衡的使用而改善了先前方法的灵活性，并且在减少燃料消耗和被动安全性方面还具有其他优点。如果计划在机载上，则可以直接执行所得到的机动，或者如果计划在机外，则可以将其用于预热启动轨迹优化器以产生进一步的改进。

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  • 来源
    《Journal of guidance, control, and dynamics》 |2017年第12期|3100-3115|共16页
  • 作者

    Frey Gregory R.; Petersen Christopher D.; Leve Frederick A.; Kolmanovsky Ilya V.; Girard Anouck Renée;

  • 作者单位

    University of Michigan, Department of Aerospace Engineering, Ann Arbor, MI, United States;

    U.S. Air Force Research Laboratory, Kirtland Air Force Base, Albuquerque, NM, United States;

    U.S. Air Force Office of Scientific Research, Arlington, VA, United States;

    University of Michigan, Department of Aerospace Engineering, Ann Arbor, MI, United States;

    University of Michigan, Department of Aerospace Engineering, Ann Arbor, MI, United States;

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