颤振试飞脉冲激励信号分析技术

摘要

Flutter mode parameters identification plays an important role in flight flutter test. A method is introduced to analyze the impulse excitation signal of flight flutter test. The improved spatial correlation filtering algorithm is used to reduce die noise of the impulse respond signal and improve the estimating precision of frequency response function. The orthogonal polynomial subsection fitting is used during model parameters identification, which helps to achieve estimating the flutter mode parameters.%颤振模态参数识别是当前飞机颤振试飞的一个重要课题.介绍了一种脉冲激励颤振试飞信号数据处理方法.采用改进的空域相关滤波法对脉冲响应信号进行降噪处理,改善频响函数估计精度.在模态参数识别过程中采用有理分式正交多项式分段拟合技术,实现颤振模态参数估计.