Results 291 to 300 of about 474,164 (345)
Some of the next articles are maybe not open access.
Identification of time varying modal parameters
The Aeronautical Journal, 1990AbstractThe ability to track time varying frequency and damping parameters using on-line versions of seven time domain system identification algorithms; Least Squares, Double Least Squares, Correlation Fit, Instrumental Variables, Instrumental Matrix with Delayed Observations, Extended Least Squares and Maximum Likelihood, is examined.
openaire +1 more source
Operational modal parameter identification based on PCA-CWT
Measurement, 2019A new continuous wavelet transform (CWT) based modal identification method is proposed to apply to ambient vibration tests. Firstly, to improve computational efficiency, perform singular value decomposition on positive power spectrum matrix, determine ...
Guowen Zhang, B. Tang, Zhuo Chen
semanticscholar +1 more source
Software Development in Frequency Domain Modal Parameter Identification
Applied Mechanics and Materials, 2012A modal parameter identification software named as N-Broband is developed in VC++ platform. The software is suitable for EMA and OMA with broband identification feature. Meanwhile it also includes narrow band and selected band modal parameter identification methods. Correlation analysis between experiment and FEA can be performed in N-Broband.
Xin Hui Sun, Mu Ming Hao, Zhen Tao Li
openaire +1 more source
Measurement, 2018
Structures are built on a design and then damaged in time by natural and manmade effects, repaired and strengthened for reusing. Determination of the structural behavior is very important to avoid future disaster.
A. Altunışık +6 more
semanticscholar +1 more source
Structures are built on a design and then damaged in time by natural and manmade effects, repaired and strengthened for reusing. Determination of the structural behavior is very important to avoid future disaster.
A. Altunışık +6 more
semanticscholar +1 more source
Identification of Modal Parameters of Rotors
1984The occurence of instability in rotating machinery may be caused by different effects: oil film in journal bearings, sealings, internal damping etc.
openaire +1 more source
Wavelet transform-based modal parameter identification considering uncertainty
Journal of Sound and Vibration, 2006Abstract This paper presents an integrated identification method to consider the uncertainty effect on modal parameters for output-only system. The method is based on the time–frequency characteristics of the wavelet transform (WT) and the capabilities of the bootstrap distribution in statistical estimation.
B.F. Yan, A. Miyamoto, E. Brühwiler
openaire +1 more source
Modal Parameters Identification with Particle Swarm Optimization
Key Engineering Materials, 2013The paper presents method of the modal parameters identification based on the Particle Swarm Optimization (PSO) algorithm. The basic PSO algorithm is modified in order to achieve fast convergence and low estimation error of identified parameters values.
openaire +1 more source
On the frequency mapping of modal parameters identification
Mechanical Systems and Signal Processing, 2007Abstract 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
openaire +1 more source
Effects of measurement noise on modal parameter identification
Smart Materials and Structures, 2012In 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
openaire +1 more source