基于陀螺测量信息的航天器突变参数识别方法

利用速率陀螺的测量信息研究了航天器质量特性参数突变的识别问题。基于物理学原理建立了航天器转动和速率陀螺的数学模型；对航天器的结构布局进行分析，提出了辨识策略和算法；利用条件数和奇异值分解理论对测量矩阵进行分析，观察突变参数的可辨识性及可辨识度；以某航天器为例，就其质量特性的可辨识性及可辨识度进行数值分析，并进行在轨辨识仿真。结果表明，当航天器参数突变后，按照所提的策略，其质量和质心位置可以辨识，且质心位置的可辨识度高于质量。

Identification of the mutation parameters for the spacecraft based on gyros

The mass property identification for a spacecraft is studied based on the gyros. Firstly, the mathematical models of the spacecraft and the measurement equations of the gyros are formulated based on the theory of physics. Secondly, the identification strategy is described by the analysis of the configuration. Thirdly, the singular value decomposition and condition number of the measure matrix are used to analyze the identifiability and identifiability degree (ID) of the mutation parameters. Finally, taking a spacecraft as an example the identifiability and ID are studied, and the least square method is proposed to identify the mass property. Simulation results show that the abrupt mass property of the spacecraft can be identified by the proposed strategy and the ID of the position is higher than mass.