中国空间科学技术

中国空间科学技术

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椭圆轨道卫星编队燃料最优机动实时算法

赵宇;张洪华;   

  1. 北京控制工程研究所空间智能控制技术国家级重点实验室;
  • 发布日期:2009-10-25

Real-time Algorithm for Formation Satellite Fuel-optimal Maneuvers in Elliptic Orbits

Zhao Yu Zhang Honghua(National Laboratory of Space Intelligent Control,Bejing Institute of Control Engineering,Beijing 100190)   

  • Online:2009-10-25

被引次数

1

摘要： 文章针对椭圆轨道编队卫星最优燃料机动的实时计算问题进行研究。利用LGL伪谱法对问题进行快速求解。由于最优燃料控制为非连续控制,如直接采用伪谱法则只有当离散点数目很大时,才能实现较高精度的编队机动控制,而这会影响算法的实时计算效率。为了克服这方面的不足,文章提出了一种时间尺度变换策略,并结合模型预测的滚动优化方法,设计了一种编队实时机动控制算法。该算法在兼顾解的全局最优性的同时改善了解的局部精确性,最后通过数值仿真验证了所设计算法的有效性。

关键词: 编队飞行, 椭圆轨道, 机动飞行控制, 伪谱法, 实时控制, 卫星

Abstract: The LGL pseudo-spectral method was applied to the rapid computation.Since a large number of discrete nodes were needed to realize the high precise formation flying control due to the non-continuity in the fuel-optimal control method,which would influence the computation efficiency,a new real-time algorithm for formation maneuvers was presented combining the time-scaling strategy with the recursive optimization method in model predictive control.The algorithm improved the local precision of results with the global optimization of results preserved.Numerical simulation results demonstrate the effectiveness of the proposed algorithm.