频域主分量模态分析法及在颤振试飞中的应用  

Frequency domain principal component modal analysis and its application in flight flutter test

作　　者：王东森[1] 王彤[2] 卢晓东[1] 周友明[1] 

机构地区：[1]中国飞行试验研究院,陕西西安710089 [2]南京航空航天大学,江苏南京210016

出　　处：《中国测试》2013年第6期89-92,共4页China Measurement & Test

摘　　要：为提高对颤振边界预测至关重要的模态阻尼的识别精度,基于频域多参考点法,采用主分量分析、奇异值分解和最小二乘技术,考虑频率响应函数负共轭部分和带外模态的影响,提出频域主分量分析模态参数识别方法,具有处理速度快、所需用户交互少的特点。通过飞机模型仿真算例验证在模态高度耦合情况下该方法的有效性,并在实际飞行颤振试验中进行应用。A frequency domain principal component modal identification algorithm was presented to improve the precision of damping estimation in this paper. The techniques of principal component analysis,singular value decomposition and least-square estimation were utilized, and the influence of out-band modes and negative conjugate part of the frequency response functions were considered as well. The algorithm has the characteristics of fast running and little interaction. It was validated with a simulation example of GARTEUR airplane model with highly coupled modes,and was applied to the real flight flutter test.

关 键 词：飞行器试验技术 模态分析 主分量分析 阻尼估计 

分 类 号：V217.1[航空宇航科学与技术—航空宇航推进理论与工程] V212