颤振试飞脉冲激励信号分析技术  

Analysis Technology Applied to the Impulse Excitation Signal of Flight Flutter Test

作　　者：关爱锐[1] 刘旭华[1] 张芹芹[1] 

机构地区：[1]中国飞行试验研究院,西安710089

出　　处：《科学技术与工程》2012年第4期836-838,共3页Science Technology and Engineering

摘　　要：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。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 the 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.

关 键 词：颤振试飞 脉冲激励 空域相关滤波 正交多项式 模态参数辨识 

分 类 号：V215.34[航空宇航科学与技术—航空宇航推进理论与工程]