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基于改进人工势函数的航天器近距离安全控制方法

许丹丹 张进

许丹丹, 张进. 基于改进人工势函数的航天器近距离安全控制方法[J]. 力学学报, 2020, 52(6): 1581-1589. doi: 10.6052/0459-1879-20-112
引用本文: 许丹丹, 张进. 基于改进人工势函数的航天器近距离安全控制方法[J]. 力学学报, 2020, 52(6): 1581-1589. doi: 10.6052/0459-1879-20-112
Xu D, an. A COLLISION-AVOIDANCE CONTROL ALGORITHM FOR SPACECRAFT PROXIMITY OPERATIONS BASED ON IMPROVED ARTIFICIAL POTENTIAL FUNCTION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(6): 1581-1589. doi: 10.6052/0459-1879-20-112
Citation: Xu D, an. A COLLISION-AVOIDANCE CONTROL ALGORITHM FOR SPACECRAFT PROXIMITY OPERATIONS BASED ON IMPROVED ARTIFICIAL POTENTIAL FUNCTION[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(6): 1581-1589. doi: 10.6052/0459-1879-20-112

基于改进人工势函数的航天器近距离安全控制方法

doi: 10.6052/0459-1879-20-112
基金项目: 1) 国家自然科学基金资助项目(11572345)
详细信息
    作者简介:

    3) 张进, 副教授, 主要研究方向: 航天飞行任务规划. E-mail: zhangjin@nudt.ed.cn
    2) 许丹丹, 助教, 主要研究方向: 航天动力学与控制. E-mail: 1106124587@qq.com;

    通讯作者:

    许丹丹

    许丹丹,张进

  • 中图分类号: V412.4

A COLLISION-AVOIDANCE CONTROL ALGORITHM FOR SPACECRAFT PROXIMITY OPERATIONS BASED ON IMPROVED ARTIFICIAL POTENTIAL FUNCTION

  • 摘要: 针对航天器近距离操作的安全问题,提出了一种基于人工势函数改进的碰撞规避控制算法.根据航天器与目标、障碍物之间的实时状态, 利用人工势函数算法,计算航天器的实时加速度, 规划航天器的轨迹. 为改进人工势函数方法的适用性,提出三个方面的改进措施: 首先, 在人工势函数算法中, 为提高碰撞预警的准确性,减少额外机动, 碰撞预警采用碰撞概率代替相对距离. 其次, 为了提高对接安全,降低接近目标航天器的相对速度, 利用相对速度的安全接近走廊来计算目标排斥力.最后, 针对大多航天器不能提供任意连续变化推力的情况, 设置两种实用的推力形式,如bang-bang控制的推力形式和恒定变化率的推力形式, 代替连续变推力形式.通过对不同算例的比较,成功地揭示了主要任务参数(如碰撞预警方法、速度安全边界和实际加速度形式)对近距离操作安全的影响.结果表明, 该方法可以提高航天器近距离操作的安全性、效率性, 并且结构简单,实时性强.

     

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出版历程
  • 收稿日期:  2020-04-14
  • 刊出日期:  2020-12-10

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