Results 211 to 220 of about 62,230 (267)

Cable Modal Parameter Identification. II: Modal Tests

Journal of Engineering Mechanics, 2009
The cable dynamic stiffness describes the load – deformation behavior that reflects the cable intrinsic dynamic characteristics. It is defined as a ratio of response to excitation and represents a very similar frequency response property to the frequency response function (FRF). Therefore, by fitting both analytical cable dynamic stiffness and measured
Wei-Xin Ren, Wei-Hua Hu
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Modal parameter identification using simulated evolution

AIAA Journal, 1997
A global optimization algorithm based on the Darwinian evolutionary theory is implemented for the identification of modal parameters of linear vibrating structures. The capability of the evolutionary search method in locating the global minimum among numerous local minima is demonstrated.
Chiang, Dar-Yun, Huang, Si-Tsong
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Modal Parameter Analysis of Gyroelastic Continua

Journal of Applied Mechanics, 1986
This paper builds on the theory of gyroelastic dynamics presented in a recent paper by the authors. An elastic continuum with a continuous distribution of stored angular momentum (called gyricity) is considered. We introduce the modal parameters (coefficients) thereof, including integrals of the mode shapes, and show they must satisfy a number of ...
Hughes, P. C., D'Eleuterio, G. M. T.
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Modal Parameter Identification of Controlled Structures

Journal of Guidance, Control, and Dynamics, 1997
A simple procedure to extract the modal parameters of the closed-loop structural system is proposed. It is formulated by using the extended Kalman filter (EKF) technique. The unknown parameters are eigenfrequencies, damping ratios, mode shapes, and modal masses.
Kasai, Tokio, Komatsu, Keiji, Sano, Masa
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Modal Parameter Estimation Using Acoustic Modal Analysis

2011
Acoustic modal analysis (AMA) is of interest in cases where accelerometer measurements are limited by mounting techniques and where the mass of sensors affects the system dynamics. Major problems in performing AMA are time delay adjustment and the inability of obtaining true driving point measurements.
W. Elwali, H. Satakopan, V. Shauche, R. Allemang, A. Phillips   +4 more
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Modal Parameter Estimation for Piezostructures

Journal of Vibration and Acoustics, 1995
This paper is motivated by the need for consistency between piezostructure measurements and existing modal analysis approaches. Fundamental relationships are developed which reveal that the existing framework of traditional modal analysis approaches can be used to estimate modal parameters which describe the piezostructure dynamics.
D. G. Cole, W. R. Saunders, H. H. Robertshaw   +2 more
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Modal parameter estimation using synchrophasors

2015 IEEE PES Innovative Smart Grid Technologies Latin America (ISGT LATAM), 2015
The development and diversification of the Uruguayan power electric infrastructure, with the significant incorporation of renewable sources is leading to changes in the operation criteria.With all these efforts to make the power system more efficient and smarter, real-time analysis are becoming more required and necessary.
Agustin Fraschini, Celia Sena
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Experimental modal analysis and modal parameters extraction

2009
A case study approach in the inverse analysis of the modal extraction parameter has been implemented. The Mathematical model has been used to generate time response and random generator to generate added noise. The accuracy of modal parameters extraction techniques to error-contaminated measured data has been assessed for the simple examples.
Lozina, Željan, Sedlar, Damir, Karišik, Edin   +2 more
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FINITE DIFFERENCE FORMULATION FOR MODAL PARAMETER ESTIMATION

Journal of Sound and Vibration, 2000
Summary: We deal with a new finite difference method for modal parameter estimation. This method uses formulas which involve differences between the frequency response data at three frequencies in the vicinity of a natural frequency to estimate this natural frequency together with the damping and the residue.
Yin, H. P., Duhamel, D.
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Modal parameter identification using Z‐transforms

International Journal for Numerical Methods in Engineering, 1989
AbstractA method for the time domain identification of modal parameters of a vibrating structure using Z‐transformation sequences is presented in this paper.This identification proceeds using the Z‐transfer function of a vibrating structure from which an auto‐regressive and moving‐average (ARMA) model of the vibrating structure is derived.
Mickleborough, Neil C., Pi, Y.L.
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