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模态参数识别的特征系统实现算法:研究与比较
引用本文:秦仙蓉,王彤,张令弥.模态参数识别的特征系统实现算法:研究与比较[J].航空学报,2001,22(4):340-342.
作者姓名:秦仙蓉  王彤  张令弥
作者单位:南京航空航天大学振动工程研究所,
摘    要: 以 GARTEUR飞机模型的飞行颤振和地面共振试验为例,对模态参数识别的特征系统实现算法的4种变形特征系统实现算法(ERA)、快速ERA(FERA)、相关ERA(ERA/ DC)和快速相关ERA(FERA/ DC),进行了深入的理论分析和仿真研究。结果表明:与ERA相比,ERA/ DC的阻尼识别精度在10%和30%噪声下可以提高6~60倍;FERA的识别速度可以比ERA提高4~1 0倍,且精度较高;而FERA/ DC的识别速度可以比ERA/ DC提高 3~5倍,并且精度不会降低。

关 键 词:模态参数识别  特征系统实现  相关算法  地面共振  飞行颤振  
文章编号:1000-6893(2001)04-0340-03
修稿时间:2000年4月11日

COMPARISON OF DIFFERENT VARIANTS OF THE EIGENSYSTEM REALIZATION ALGORITHM IN MODAL PARAMETER IDENTIFICATION
QIN Xian-rong,WANG Tong,ZHANG Ling-mi.COMPARISON OF DIFFERENT VARIANTS OF THE EIGENSYSTEM REALIZATION ALGORITHM IN MODAL PARAMETER IDENTIFICATION[J].Acta Aeronautica et Astronautica Sinica,2001,22(4):340-342.
Authors:QIN Xian-rong  WANG Tong  ZHANG Ling-mi
Institution:Institute of Vibration Engineering, Nanjing University of Aeronautic s and Astronautics, Nanjing 210016, China
Abstract:Different variants of the Eigensystem Realization Algorithm(ERA), i.e, ERA, Fast ERA(FERA), ERA with Data Correlation(ERA/DC), Fast ERA/DC(FERA/DC), are compared for accuracy, robustness and identification speed. Comparisons are made on the basis of a popular aircraft model, GARTEUR. Ground and flutter tests of the model are simulated in detail. Results suggest that identification quality of the two DC algorithms is clearly superior to the others, with the accuracy of the identified modal damping improved by 6-60 times, and that FERA accelerates the process of ERA 4-10 times and likely renders more accurate results. As to FERA/DC, its speed is 3-5 times that of ERA/DC, while the accuracy has not deteriorated.
Keywords:modal parameter identification  eigensystem realizati on  correlation algorithm  ground test  flutter test
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