• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>AAS/AIAA astrodynamics specialist conference >ASTEROID PRECISION LANDING VIA MULTIPLE SLIDING SURFACES GUIDANCE TECHNIQUES
【24h】

ASTEROID PRECISION LANDING VIA MULTIPLE SLIDING SURFACES GUIDANCE TECHNIQUES

机译：通过多滑面引导技术进行星体精密降落

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Autonomous close proximity operations (hovering, landing) in the low-gravityenvironment exhibited by asteroids are particularly challenging. A novel nonlinearlanding guidance scheme has been developed for spacecrafts that are requiredto execute autonomous closed-loop guidance to a designated point onthe asteroid surface. Based on High Order Sliding Mode control theory, theproposed Multiple Sliding Surface Guidance (MSSG) algorithm has been designedto take advantage of the ability of the system to reach the sliding surfacein a finite time. High control activity typical of sliding control design isavoided resulting in a guidance law that is robust against unmodeled yetbounded perturbations. The proposed MSSG does not require any off-line trajectorygeneration and therefore it is flexible enough to target a large variety ofpoints on the surface without the need of ground-based trajectory analysis. Theglobal stability of the proposed guidance algorithm is proven using aLyapunov-based approach. The behavior of the MSSG-based class of asteroidlanding trajectories is investigated via a parametric analysis and a full set ofMonte Carlo simulations in realistic landing scenarios. Based on such results,the MSSG algorithm is demonstrated to be very accurate and flexible. The proposedscheme is suitable for onboard implementation and deployment for asteroidlanding and close proximity operations.
机译：低重力下的自主近距离操作（悬停，着陆） 小行星所展现的环境特别具有挑战性。一种新颖的非线性 已经为所需的航天器制定了着陆引导方案 执行自主闭环引导至指定点 小行星表面。基于高阶滑模控制理论， 提出了一种多滑动面制导（MSSG）算法 利用系统到达滑动表面的能力 在有限的时间内滑动控制设计中典型的高控制活动是 避免产生对未建模的鲁棒的指导法则 有限的扰动。拟议的MSSG不需要任何离线轨迹 代，因此它足够灵活，可以针对多种 不需要地面轨迹分析就可以在表面上确定点。这 所提出的制导算法的全局稳定性通过使用 基于Lyapunov的方法。基于MSSG的小行星的行为 登陆轨迹通过参数分析和全套 现实降落场景中的蒙特卡洛模拟。基于这样的结果， MSSG算法被证明是非常准确和灵活的。建议 该方案适用于小行星的机载实施和部署 着陆和近距离作战。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号