摘要
从结构模态参数的可识别性出发,结合时域频域参数识别技术和数字处理技术,开发出航天器动力学特征参数在轨辨识系统,系统包括硬件和软件。在此基础上设计了模拟在轨航天器的试验验证系统,以检验辨识算法和设计软件的可靠性以及航天器在轨辨识的实时性,该试验系统包括一个对称的双梁结构,利用对称结构的弱耦合可得到多个密集模态。试验和模拟数字考核结果表明系统辨识算法可靠,精度可以到达设计要求。
Based on the structure identifiability, some frequency-domain technologies using free dynamic response were discussed. Including the identification software and algorithm, an identification system which is used to identify dynamic characteristics of an on-orbit space vehicle has been developed. And also a test certification system was designed to verify the reliability of the system as well as the identification algorithm. The test certification system consists of a twin-beam whose two parts are weakly coupled through a flexible beam-like element and possesses several densely spaced low-frequency modes. The test results show that the system is reliable and the precision of the identification algorithm can meet design requirements.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第6期65-67,84,共4页
Journal of Vibration and Shock
关键词
在轨航天器
环境激励
低频密集
动力学特性
参数辨识
Algorithms
Dynamic response
Identification (control systems)
Perturbation techniques
Reliability
