Results 211 to 220 of about 17,209 (267)

Identification of modal parameters in vibrating structures

Journal of Sound and Vibration, 1988
Abstract A method is presented for the identification of the eigensolution associated with vibrating structures. The identification can be performed in the presence of periodic external excitations and noisy measurements. It is assumed that the mass properties of the structure are known, and that the stiffness properties are not known.
H. Baruh, H.P. Khatri
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On the frequency mapping of modal parameters identification

Mechanical Systems and Signal Processing, 2007
Abstract With borrowing the complex orthogonal polynomial (OP), the numerical condition of the normal matrix of the rational fractional polynomial method is insensitive to frequency scaling. The other two concerns are, the first, transforming coefficients based on OPs into coefficients based on monomials, and the second, computing polynomials.
Kui-Fu Chen, Qun-Ying Jiao, Yan-Hua Shen
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Mode isolation: A new algorithm for modal parameter identification

The Journal of the Acoustical Society of America, 2001
Multiple degree of freedom (MDOF) algorithms are the dominant methods for extracting modal parameters from measured data. These methods are founded on the notion that because the response of a linear dynamic system is the sum of many modal contributions, the extraction technique must deal with all of the modal parameters in a simultaneous fashion.
M V, Drexel, J H, Ginsberg
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Identification of Modal Parameters with Unknown Input

2003
The techniques developed for structural identification are typically devoted to obtain a structural model on the base of information on the response and on the forcing action. In many situations, however, it can be necessary to refer only to the measured responses.
DE ANGELIS, Maurizio, SEPE V., CAPECCHI, Danilo   +2 more
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Theory and Application of Modal Parameter Identification in Civil Engineering

Proceedings of the 3rd International Conference on Information Technologies and Electrical Engineering, 2020
Civil engineering is an important part of China's infrastructure equipment, which directly affects the lives of our people. In the process of civil engineering construction, it is necessary to detect, evaluate and monitor the overall structure of the engineering, so as to give full play to the characteristics of civil engineering.
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Identification Technology of Modal Parameter of a Strap-on Launch Vehicle

International Journal of Computational Methods, 2016
It is generally needed to conduct ground modal tests over strap-on launch vehicle to provide modal parameters for the attitude control design and load calculating. These modal parameters can also provide basis of installing sense organs on the launch vehicle.
Liu, Pan, Xie, Yong, Guo, Shao-Jing, Cai, Guo-Ping   +3 more
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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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Parameter identification for the shallow water equation using modal decomposition

2007 46th IEEE Conference on Decision and Control, 2007
A parameter identification problem for systems governed by first-order, linear hyperbolic partial differential equations subjected to periodic forcing is investigated. The problem is posed as a PDE constrained optimization problem with data of the problem given by the measured input and output variables at the boundary of the domain.
Wu, Qingfang, Amin, Saurabh, Munier, Simon, Bayen, Alexandre, Litrico, Xavier, Belaud, Gilles   +5 more
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Effects of measurement noise on modal parameter identification

Smart Materials and Structures, 2012
In the past decade, much research has been conducted on data-driven structural health monitoring (SHM) algorithms with use of sensor measurements. A fundamental step in this SHM application is to identify the dynamic characteristics of structures.
S Dorvash, S N Pakzad
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Modal identification of gyroscopic distributed-parameter systems

AIAA Journal, 1990
A new modal identification method for gyroscopic distributed-parameter systems is presented. The method represents an extension of previous work for the class of self-adjoint distributed-parameter systems. The modal identification method is formulated as a variational problem in which stationary values of a functional quotient are sought.
Mark A. Norris, Larry Silverberg
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