论文部分内容阅读
本文利用状态空间方程给出一般粘性阻尼线性振动系统的线性高阶微分多项式模型,及其所对应的离散差分模型.这个模型描述了系统多输入激励信号和多输出响应信号之间的关系.近十年来发展起来的多输入—多输出实验模态参数识别都是建立在这个模型之上的,在这个意义上,我们称之为多输入—多输出实验模态参数识别技术的统一数学模型.当考虑到测量频段外模态和测量数据中噪声的影响时,本文也给出了相应的统一数学模型.
In this paper, a linear high-order differential polynomial model of a general viscous-damping linear vibration system and its corresponding discrete difference model are given by the state-space equation. This model describes the relationship between the system multi-input excitation signal and the multi-output response signal. The multi-input and multi-output experimental modal parameter identification developed in the past decade is based on this model. In this sense, we call it the unified mathematical model of multi-input and multi-output experimental modal parameter identification technology. When considering the effect of noise outside the measurement frequency band mode and measurement data, this paper also gives the corresponding unified mathematical model.