User-assisting tools for a fast frequency-domain modal parameter estimation method

Verboven, Peter; Cauberghe, Bart; Parloo, Eli; Vanlanduit, Steve; Guillaume, Patrick

doi:10.1016/s0888-3270(03)00053-0

Cited by 30 publications

(24 citation statements)

References 13 publications

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“…The formulation is similar to the LSCF estimator described in [4,11,62]. The LSCF estimator uses a common-denominator model to be curvefitted on all FRF estimates in a least squares sense.…”

Section: Step 1 Rfpsmentioning

confidence: 99%

“…The computation of the poles for each model order can be done in an efficient way by solving Eq. (6.17) for submatrices of L i , see [62] for details. The continuous system poles can also be plotted for varying the fixed coefficient (i.e from α i0 = 1 to α in = 1), see Figs.…”

Section: Step 4 Stabilization Chartsmentioning

confidence: 99%

“…If desired, "accidentally stable" poles can be deleted by the user or "accidentally unstable" poles can be kept. In [62] an alternative method is presented to automatically select the poles.…”

Section: Step 4 Stabilization Chartsmentioning

confidence: 99%

“…based on predictive error models [34] or subspace identification [12], identify a model describing input-output relations. Modal identification methods [4,6,11,62] are dedicated to identify the resonance frequencies and mode shapes of a structural dynamic system. An advantage of modal identification methods over general system identification methods is that some basic knowledge about the nature of the system can be used to enforce constraints (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The first step of the method is based on the framework of the least squares complex frequency domain (LSCF) estimator [4,11,62]. The LSCF estimator is using estimates of the frequency response functions (FRF estimates) to identify the system poles by curvefitting a model on all FRF estimates simulta-neously.…”

Section: Introductionmentioning

confidence: 99%

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Section: Step 1 Rfpsmentioning

confidence: 99%

Section: Step 4 Stabilization Chartsmentioning

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Section: Step 4 Stabilization Chartsmentioning

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Development of laser‐based remote sensing technique for detecting defects of concrete lining

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Kotyaev

Kurahashi

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Laser‐based remote sensing system (LRSS) for detecting defects of concrete lining has been developed. This system can move a central passage in Shin‐kansen tunnel and detected the concrete defects. We have developed automatic positioning and focusing system of impact and detection lasers. It was confirmed that this system inspected concrete defects with remote and high speed and soundness could be judged.

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A reassessment of dynamic characteristics of the Quincy Bayview Bridge using output‐only identification techniques

Pridham

Wilson

2005

Earthq Engng Struct Dyn

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SUMMARYA reassessment of the dynamic characteristics of the 542 m cable-stayed Bayview Bridge in Quincy, Illinois, is presented using a newly developed output-only system identiÿcation technique. The technique is applied to an extensive set of ambient vibration response data acquired from the bridge in 1987. Vertical, torsional and transverse modal frequencies of the deck are identiÿed, and uncertainty in damping values are estimated using an automated procedure on several redundant measurements at four locations. Important practical implementation issues associated with the implementation of the procedure and selection of algorithm design parameters for stochastic subspace identiÿcation techniques are discussed.An overall mean and standard deviation of damping of 1:0 ± 0:8% is estimated considering all identiÿed vertical, torsional and transverse modes in the 0-2 Hz band. The mean damping for the fundamental vertical mode (0:37 Hz) is identiÿed as 1:4 ± 0:5%, and for the ÿrst coupled torsiontransverse mode (0:56 Hz) is identiÿed as 1:1 ± 0:8%. Variability in the damping estimates is shown to decrease as estimated modal RMS acceleration levels increase. Standard deviations on estimated damping range from 0.05% to 2%. The results are shown to be a substantial improvement in the evaluation of damping compared to earlier spectral analysis conducted on the same data set.

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User-assisting tools for a fast frequency-domain modal parameter estimation method

Cited by 30 publications

References 13 publications

Active hard mount vibration isolation for precision equipment

Active hard mount vibration isolation for precision equipment

Development of laser‐based remote sensing technique for detecting defects of concrete lining

A reassessment of dynamic characteristics of the Quincy Bayview Bridge using output‐only identification techniques

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