| 模态参数识别在飞行颤振试验中的应用 |
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| 引用本文： | 屈见忠,沙长安.模态参数识别在飞行颤振试验中的应用[J].航空学报,1990,11(11):618-622. |
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| 作者姓名： | 屈见忠 沙长安 |
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| 作者单位： | 飞行试验研究院
(屈见忠)，飞行试验研究院(沙长安) |
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| 摘 要： | 本文介绍了飞机飞行颤振试验的简况、颤振试飞数据处理的特点和一些特殊要求。简要介绍了用频域参数识别方法和时域参数识别方法识别模态频率和阻尼的基本原理和基本数学模型。文中着重介绍了为解决颤振试飞中所获得的信号的信噪比差,而又要求识别的模态阻尼值的精度比较高这个矛盾和为了尽量缩短数据分析所花费的计算时间而采取的若干措施。
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| 关 键 词： | 颤振 模态参数识别 飞行试验 |
APPLICATION OF IDENTIFICATION METHOD OF MODAL PARAMETER TO FLIGHT FLUTTER TEST |
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| China Academy of Flight Test Qu Jianzhong and Sha Changan.APPLICATION OF IDENTIFICATION METHOD OF MODAL PARAMETER TO FLIGHT FLUTTER TEST[J].Acta Aeronautica et Astronautica Sinica,1990,11(11):618-622. |
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| Authors: | China Academy of Flight Test Qu Jianzhong and Sha Changan |
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| Institution: | China Academy of Flight Test Qu Jianzhong and Sha Changan |
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| Abstract: | This paper introduces the compendium of flight flutter test and the features and specific reguirements of data processing with flight flutter test. It outlines the fundamentals and the basic mathematical model of identifying modal frequency and damping by means of parameter identification with frequency domain and time domain. It emphatically describes appropriate measures taken for solving the contradication with lower signal-to-noise ratio of signal obtained from flight flutter test and higher accuracy of identified modal damping, and for short endng the time of data-analysis. |
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| Keywords: | flutter identification of modal parameter flight test |
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