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Unsteady Aerodynamic Modeling Based on POD-ARX
Wang XP; Zhang CA(张陈安); Liu W(刘文); Wang FM(王发民); Ye ZY
2018-02-18
发表期刊INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
页码5902794
ISSN1687-5966
摘要

The lack of stability is a problem encountered when applying the classical POD-Galerkin method to problems of unsteady compressible flows around a moving structure. To solve this problem, a hybrid reduced-order model named POD-ARX is constructed in this paper. The construction of this model involves two steps, including first extracting the fluid modes with the POD technique and then identifying the modal coefficients with the ARX model. The POD modes with the block of all modified primitive variables are extracted from the system response to the training signal. Once the POD modes are obtained, the snapshots are projected on these modes to determine the time history of modal coefficients and the resulting modal coefficients are used to identify the parameters of ARX model. Then, the ARX model is used to predict the modal coefficients of the system response to the validation signal. Sample two-dimensional aerodynamic force calculations are conducted to demonstrate this method. Results show that this method can produce a stable and accurate prediction to the aerodynamic response with significant improvement of computational efficiency for linear and even some nonlinear aerodynamic problems. In addition, this method also shows good wide-band characteristics by using the "3211" multistep signal as the training signal.

DOI10.1155/2018/5902794
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000446024100001
关键词[WOS]Reduced-order Models ; Proper Orthogonal Decomposition ; Frequency Lock-in ; Compressible Flows ; Volterra Series ; Flutter ; Systems ; Aeroelasticity ; Reduction ; Equations
WOS研究方向Engineering, Aerospace
WOS类目Engineering
项目资助者Strategic Priority Research Program of Chinese Academy of Sciences [XDA17030100]
论文分区Q3
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77954
专题高温气体动力学国家重点实验室
通讯作者Zhang CA(张陈安)
作者单位1.Northwestern Polytech Univ, Xian 710072, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714
Wang XP,Zhang CA,Liu W,et al. Unsteady Aerodynamic Modeling Based on POD-ARX[J]. INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING,2018:5902794.
APA Wang XP,Zhang CA,Liu W,Wang FM,&Ye ZY.(2018).Unsteady Aerodynamic Modeling Based on POD-ARX.INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING,5902794.
MLA Wang XP,et al."Unsteady Aerodynamic Modeling Based on POD-ARX".INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING (2018):5902794.
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