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Reliable Distributed Integrated Navigation Based on CI during Mars Entry

机译：火星进入过程中基于CI的可靠分布式集成导航

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摘要

A reliable distributed covariance intersection (CI) fusion integrated navigation algorithm with information feedback during the Mars atmospheric entry is proposed to meet robust, reliable, and high-precision Mars atmospheric entry navigation strategy. A distributed integrated navigation scheme includes four independent subsystems consisting of an IMU and one radio beacon, but each subsystem is weakly observable under limited Mars entry measurements. The scalar weights are fast obtained by maximizing the information contribution of the corresponding estimate. The distributed framework based upon the CI fusion algorithm is designed by using dynamic information distribution coefficients and information feedback strategy. This distributed fusion approach could meet the lower computation cost and robust and reliable capacity and especially is beneficial to the weakly observable or unobservable subsystems during the Mars entry navigation scheme. Numerical simulations show that the proposed distributed CI fusion integrated navigation algorithm can provide consistent navigation accuracy for the Mars entry vehicle and improve the entry navigation robustness under the weakly observable navigation subsystems.
机译：为了满足鲁棒，可靠，高精度的火星大气进入导航策略，提出了一种可靠的分布式信息协方差交点融合融合导航算法，该算法具有信息反馈。分布式集成导航方案包括由IMU和一个无线电信标组成的四个独立子系统，但是在有限的火星进入测量下，每个子系统都很难观察到。通过最大化相应估计的信息贡献，可以快速获得标量权重。利用动态信息分配系数和信息反馈策略设计了基于CI融合算法的分布式框架。这种分布式融合方法可以满足较低的计算成本，鲁棒和可靠的容量，并且特别有利于火星进入导航方案中的弱可观测或不可观测子系统。数值仿真表明，本文提出的分布式CI融合集成导航算法可以为火星进入车辆提供一致的导航精度，并在弱可观测的导航子系统下提高了进入导航的鲁棒性。

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  • 来源
    《International journal of aerospace engineering》 |2019年第2期|1802659.1-1802659.11|共11页
  • 作者

    Lou Tai-shan; Chen Nan-hua; Wang Xiao-qian; He Zhen-dong; Liu Jie;

  • 作者单位

    Zhengzhou Univ Light Ind, Sch Elect & Informat Engn, Zhengzhou 45002, Henan, Peoples R China;

    Zhengzhou Univ Light Ind, Sch Elect & Informat Engn, Zhengzhou 45002, Henan, Peoples R China;

    Zhengzhou Univ Light Ind, Sch Elect & Informat Engn, Zhengzhou 45002, Henan, Peoples R China;

    Zhengzhou Univ Light Ind, Sch Elect & Informat Engn, Zhengzhou 45002, Henan, Peoples R China;

    Zhengzhou Univ Light Ind, Sch Elect & Informat Engn, Zhengzhou 45002, Henan, Peoples R China;

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