A solar wing modal type rapid identification method for on-orbit identification comprises the following steps: (1) processing free vibration time domain information of measuring points distributed on a solar wing by adopting an FFT (Fast Fourier Transform) method to obtain vibration spectrums of the measuring points in three orthogonal motion directions; and (2) identifying in-plane and out-of-plane modals according to a frequency spectrum calculation result. And (3) after the solar wing flexible structure enters a free vibration state by adopting an ERA method, intercepting free vibration response data in the out-of-plane movement direction of each measuring point for a period of time to obtain a system state matrix and an observation matrix reflecting the discrete state equation of the out-of-plane movement of each measuring point. And (4) calculating the real modal shape of the flexible structure. And (5) completing out-of-plane modal type identification according to the obtained real modal shape. According to the method, when in-orbit identification is carried out on a large-scale space solar wing structure, the types of the modals of all orders can be rapidly distinguished, and therefore the purposes of rapid analysis and comparison with a ground finite element model and the like are achieved.

    一种面向在轨辨识的太阳翼模态类型快速识别方法,步骤为:(1)采用FFT方法对太阳翼上分布的测点的自由振动时域信息进行处理,得到各测点在三个正交运动方向的振动频谱。(2)根据频谱计算结果,识别面内和面外模态。(3)采用ERA方法,在太阳翼挠性结构进入自由振动状态后,截取一段时间长度的各测点面外运动方向自由振动响应数据,得到反映各测点面外运动的离散状态方程的系统状态矩阵、观测矩阵。(4)计算挠性结构的实模态振型。(5)根据得到的实模态振型,完成面外模态类型识别。本发明方法能够对大型空间太阳翼结构实施在轨辨识时,快速判别所得各阶模态的类型,从而实现与地面有限元模型的快速分析比对等目标。


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    Titel :

    Solar wing modal type rapid identification method for on-orbit identification


    Weitere Titelangaben:

    一种面向在轨辨识的太阳翼模态类型快速识别方法


    Beteiligte:
    ZHANG GUOQI (Autor:in) / LI GONGJUN (Autor:in) / ZHANG JINJIANG (Autor:in) / LEI YONGJUN (Autor:in)

    Erscheinungsdatum :

    2023-12-22


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / B64G Raumfahrt , COSMONAUTICS



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