机构地区: 五邑大学信息学院
出 处: 《微计算机信息》 2010年第31期143-144,135,共3页
摘 要: 应用二阶盲辨识实现模态参数辨识是一种新的时域模态分析方法。该方法将系统的各阶模态假定为各自独立的源信号,对环境激励下的系统响应信号进行二阶盲辨识处理,得到系统混合矩阵、独立的源信号和各阶模态参数。文中利用有限带宽的高斯白噪声激励简支梁模型进行模态识别实验,得出了简支梁的4阶模态参数。实验结果表明基于二阶盲辨识的模态分析法可以有效地识别系统的模态参数。 Modal parameter identification based on the second order blind identification (SOBI) is a new time domain method of modal analysis. Using this method,the system modals are assumed to be some independent source signals,then system mixing matrix,independent source signals and the modal parameters of every order are acquired by using SOBI to process the system excitation responses. In this paper,4-order model parameter identification of a simply supported beam is tested by the limited bandwidth Gaussian white noise excitation. The result shows that this method has a good effect in model analysis.
领 域: [自动化与计算机技术] [自动化与计算机技术]