Real-time flutter boundary prediction based on time series models
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所属单位：航空学院
发表刊物：Proc SPIE Int Soc Opt Eng
摘要：For the purpose of predicting the flutter boundary in real time during flutter flight tests, two time series models accompanied with corresponding stability criterion are adopted in this paper. The first method simplifies a long nonstationary response signal as many contiguous intervals and each is considered to be stationary. The traditional AR model is then established to represent each interval of signal sequence. While the second employs a time-varying AR model to characterize actual measured signals in flutter test with progression variable speed (FTPVS). To predict the flutter boundary, stability parameters are formulated by the identified AR coefficients combined with Jury's stability criterion. The behavior of the parameters is examined using both simulated and wind-tunnel experiment data. The results demonstrate that both methods show significant effectiveness in predicting the flutter boundary at lower speed level. A comparison between the two methods is also given in this paper. © COPYRIGHT SPIE.
ISSN号：0277-786X
是否译文：否
发表时间：2018-01-01
合写作者：顾文景
通讯作者：周丽