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Vibration-based damage detection in wind turbine blades using Phase-based Motion Estimation and motion magnification by Aral Sarrafi; Zhu Mao; Christopher Niezrecki; Peyman Poozesh is a Engineering article available to read on EtoBox.

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Vibration-based Structural Health Monitoring (SHM) techniques are among the most common approaches for structural damage identification. The presence of damage in structures may be identified by monitoring the changes in dynamic behavior subject to external loading, and is typically performed by using experimental modal analysis (EMA) or operational modal analysis (OMA). These tools for SHM normally require a limited number of physically attached transducers (e.g. accelerometers) in order to record the response of the structure for further analysis. Signal conditioners, wires, wireless receivers and a data acquisition system (DAQ) are also typical components of traditional sensing systems used in vibration-based SHM. However, instrumentation of lightweight structures with contact sensors such as accelerometers may induce mass-loading effects, and for large-scale structures, the instrumentation is labor intensive and time consuming. Achieving high spatial measurement resolution for a large-scale structure is not always feasible while working with traditional contact sensors, and there is also the potential for a lack of reliability associated with fixed contact sensors in outliving

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Author

Aral Sarrafi; Zhu Mao; Christopher Niezrecki; Peyman Poozesh

Published

2018

Language

EN

Field

Engineering (Physical Sciences)