Scanning Laser Doppler Vibrometer Type

Gade, Svend; Møller, Niels; Jacobsen, Niels-Jørgen; Hardonk, Boyd

doi:10.4271/2002-01-3575

Cited by 1 publication

(2 citation statements)

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“…Different approaches to perform a modal analysis on civil constructions such as bridges are commonly in practice [1][2][3][4][5][6][7][8][9][10][11][12]. Depending on the excitation used these methods are divided into Experimental Modal Analysis (EMA) or Operational Modal Analysis (OMA).…”

Section: Introductionmentioning

confidence: 99%

“…[11] investigates the application of the SLDV for structural health monitoring and covers the issues of data acquisition, system identification and structural damage detection. Other advantages of the SLDV system are reduction of the measurement time and possibility for the measurement of structural elements located in a difficult position or a hazardous environment since the data acquisition is possible without contact [12].…”

Section: Introductionmentioning

confidence: 99%

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Implementation of the Scanning Laser Doppler Vibrometer Combined with a Light-Weight Pneumatic Artificial Muscle Actuator for the Modal Analysis of a Civil Structure

Deckers

Guillaume

Vuye

et al. 2012

Shock and Vibration

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Abstract. The identification of the modal parameters of bridges and other large civil constructions has become an important research issue. Different approaches have been proposed depending on the excitation used: ambient excitations (due to wind, traffic, . . .) or artificial excitations (e.g. impact test with heavy drop weights). In practice it turns out that not all modes are well excited by the ambient forces. Hence the application of an artificial actuator is advisable. The problem is that larger constructions often require large and heavy excitation devices, which are hard to manipulate. Another difficulty encountered in performing a modal analysis on large civil constructions is the necessity for a large number of high sensitivity sensors. Consequently a large number of cables has to be installed resulting in a large setup time.This paper is a proof-of-concept which demonstrates the possibility of using lightweight Pneumatic Artificial Muscles combined with the scanning laser Doppler vibrometer to perform a modal analysis on a civil structure. This combination allows for an important reduction in setup time and allows for sine testing as well as the application of broadband signals such as periodic chirps, true noise or multisines.

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