Output-only Modal Analysis using Continuous-Scan Laser Doppler Vibrometry and application to a 20kW wind turbine
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منابع مشابه
Output-Only Modal Analysis Using Continuous-Scan Laser Doppler Vibrometry and Application to a 20kW Wind Turbine
Continuous-scan laser Doppler vibrometry (CSLDV) is a method whereby one continuously sweeps the laser measurement point over a structure while measuring, in contrast to the conventional scanning LDV approach where the laser spot remains stationary while the response is collected at each point. The continuousscan approach can greatly accelerate measurements, allowing one to capture spatially de...
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Continuous Scan Laser Doppler Vibrometry (CSLDV) can greatly accelerate modal testing by continuously sweeping the measuring laser over the structure, effectively capturing the response of the structure at tens or even hundreds of points simultaneously. The authors recently extended this technique to the case where the input forces are unmeasured and random using harmonic power spectrum. This p...
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Experimental structural dynamic measurements are traditionally obtained using discrete sensors such as accelerometers, strain gauges, displacement transducers, etc... These techniques are known for providing measurements at discrete points. Also, a majority of these sensors require contact with the structure under test which may modify the dynamic response. In contrast, a few recently developed...
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Matthew S. Allen Assistant Professor [email protected] Department of Engineering Physics University of Wisconsin-Madison 535 Engineering Research Building 1500 Engineering Drive Madison, WI 53706 Abstract A laser Doppler vibrometer typically measures the translational velocity at a single point along the direction of incident light. However, it has been shown that rotational velocities can ...
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The output data from a structure is the building block for output-only modal analysis. The structure response in the output data, however, is usually contaminated with noise. Naturally, the success of output-only methods in determining the modal parameters of a structure depends on noise level. In this paper, the possibility and accuracy of identifying the modal parameters of a simply supported...
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ژورنال
عنوان ژورنال: Mechanical Systems and Signal Processing
سال: 2012
ISSN: 0888-3270
DOI: 10.1016/j.ymssp.2012.04.012