飞机颤振模态参数的频域子空间辨识

 研究了基于非参数噪声模型的频域子空间系统辨识法，并采用频域子空间辨识算法实现了基于多通道数据的颤振模态参数辨识，改变了传统的单通道颤振试验数据分析模式，试验结果表明子空间算法能有效提取多通道数据中包含的主要危险模态信息，且计算量小，适用于模态参数的在线分析。

Subspace Identification in Frequency-domain Applied to Aircraft Flutter Modal Parameter Identification

The frequency-domain subspace system identification using non-parametric noise model is discussed in this paper,and a new flutter modal identification method based on subspace system is presented to identify the modal parameters from multichannel data.Finally,this method is illustrated by real flight data,and the results show that it can draw crisis mode efficiently and show some interesting properties for on-line flutter monitoring.