基于特征系统实现算法的天线类产品在轨模态辨识方法研究

Research on the Modal Identification Method of Antenna Products on Orbit Based on Eigensystem Realization Algorithm

采用系统实现算法(ERA)对航天器大型薄壁结构进行基于响应的时域模态参数辨识。阐述了该算法的基本原理和具体实现过程。仿真和试验结果表明,ERA辨识算法可靠,精度能够达到设计要求。

Eigensystem realization algorithm（ERA）was uesd for the modal identification of large antennas in orbit.The basic principle and realization process of the algorithm were expounded.Simulation and test results show that the algorithm is reliable,and the accuracy can meet the design requirements.