Results 211 to 220 of about 15,502 (266)

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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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 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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Cable Modal Parameter Identification. I: Theory

Journal of Engineering Mechanics, 2009
Cable modal parameters (natural frequencies and damping ratios) that represent the cable inherent dynamic characteristics play an important role in the construction, vibration control, condition assessment, and long-term health monitoring of cable-supported structures.
Wei-Xin Ren, Wei-Hua Hu
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Output-only modal parameter identification of structures by vision modal analysis

Journal of Sound and Vibration, 2021
Abstract Testing of structures by non-contact and possibly-remote video camera measurement has emerged as a promising topic in engineering fields. This paper develops a vision modal analysis framework for output-only structural modal parameter identification using vision measurement. The establishment of this framework is mainly twofold.
Zhong-Rong Lu, Guanfu Lin, Li Wang
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Multi‐modal parameter identification by automata approach

Journal of the Chinese Institute of Engineers, 1993
Abstract In this paper, we consider the multi‐modal function optimization problem. An automata model with improved learning schemes is proposed to solve the global optimization problem. Theoretically, we prove that the automaton converges to the global optimum with a probability arbitrarily close to 1.
Zen‐Kwei Huang, Sheng‐De Wang, Te‐Son Kuo   +2 more
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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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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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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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Identification of modal parameters from transmissibility measurements

Journal of Sound and Vibration, 2008
Abstract It is a well-known fact that linear dynamic behavior of structures can be studied by modeling the relation between force(s) [input(s)], acting on a structure, and their resulting structural vibration response(s) [output(s)]. For industrial structures, in their real in-operation conditions, it often becomes hard (or impossible) to ...
Devriendt, Christof, Guillaume, Patrick
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