Operational Modal Analysis for Vibration Control Following Moving Window Locality Preserving Projections for Linear Slow-Time-Varying Structures
نویسندگان
چکیده
Modal parameters can reflect the dynamic characteristics of structure and be used to control vibration. To identify operational modal linear slow-time-varying structures only from non-stationary vibration response signals, a method based on moving window locality preserving projections (MWLPP) algorithm is proposed. Based theory “time freeze”, selects fixed length takes displacement signal in each as stationary random sequence. The transient frequency shape at this window. low-dimensional embedding data set calculated by (LPP) corresponds coordinate matrix, transformation matrix matrix. simulation results mass three degree freedom (DOF) density cantilever beam show that new effectively natural signal, performance better than principal component analysis (MWPCA).
منابع مشابه
Locality Preserving Projections
Many problems in information processing involve some form of dimensionality reduction. In this paper, we introduce Locality Preserving Projections (LPP). These are linear projective maps that arise by solving a variational problem that optimally preserves the neighborhood structure of the data set. LPP should be seen as an alternative to Principal Component Analysis (PCA) – a classical linear t...
متن کاملLocality Preserving Projections (LPP)
Many problems in information processing involve some form of dimensionality reduction. In this paper, we introduce Locality Preserving Projections (LPP). These are linear projective maps that arise by solving a variational problem that optimally preserves the neighborhood structure of the data set. LPP should be seen as an alternative to principal component analysis (PCA) – a classical linear t...
متن کاملFisher Locality Preserving Projections for Face Recognition ?
In this paper, a novel dimensionality reduction method termed Fisher Locality Preserving Projections (FLPP) is proposed by introducing the maximum scatter difference criterion (MSDC) to the objective function of Locality Preserving Projections (LPP). FLPP not only inherits the advantages of LPP which attempts to preserve the local structure, but also makes full use of class information and orth...
متن کاملLocality Preserving Projections for Grassmann manifold
Learning on Grassmann manifold has become popular in many computer vision tasks, with the strong capability to extract discriminative information for imagesets and videos. However, such learning algorithms particularly on high-dimensional Grassmann manifold always involve with significantly high computational cost, which seriously limits the applicability of learning on Grassmann manifold in mo...
متن کاملModal Vibration Control in Periodic Time-varying Structures with Focus on Rotor-blade Systems
Abstract. In this paper an active controller for a periodic time-variant coupled rotor-blade system is designed. A periodic modal state feedback control scheme is designed based on a modal transformation of the system into a linear time-invariant formulation. The transformation makes it possible to design the controller using classical linear control techniques. Moreover, it provides the possib...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied sciences
سال: 2021
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app11020791