在轨航天器动力学参数辨识技术研究

针对在轨航天器低频密集和辨识时激励源有限且难于测量等特点,开展了适用于低频密集模态且不需激励信息的在轨航天器动力学参数辨识方法的研究,探讨了直接利用在轨响应数据在频域内辨识航天器动力学参数的技术;并根据在轨航天器低频密集特点,设计了在轨航天器动力学参数辨识仿真试验系统,对该辨识方法进行了试验验证。

Investigation of Dynamic Parameter Identification of On-orbit Spacecraft

In dynamic parameter identification of on-orbit spacecraft, the modal frequencies are low and high density, the excitation sources are limited and indiscernible. According to these characteristics, a dynamic parameter identification method for on-orbit spacecraft was investigated, directly utilizing on-orbit response to identify the dynamic parameters in frequency domain. It can be used for low and high density frequency identification without excitation information. Considering the characteristic of low and high density frequencies, a simulation test system for dynamic parameter identification of on-orbit spacecraft was developed, which was used to validate the method above.