Abstract
Testing was performed on a 34 meter blade at a facility in DTU Risø Campus,
featuring both wired accelerometers and lowpower MEMsbased wireless
accelerometers. Testing was focused on an induced delamination area on the trailing
edge of the blade, which was subject to various configurations in order to simulate
different degrees of damage. Excitation was performed in two ways: near the
delamination zone in a simulation of operational wind excitations, and with a bar
designed to excite torsional modes of the wind turbine blade.
We compare the data collected from the wireless sensors against wired sensors to
demonstrate their performance. We explore methods for determining damage. We first
explore results of autoregressive coefficients for indicating damage levels. Finally, we
demonstrate the use of damage sensitive features from the wavelet transforms of input
and output signals to provide a method suitable for nonstationary blade excitations.
featuring both wired accelerometers and lowpower MEMsbased wireless
accelerometers. Testing was focused on an induced delamination area on the trailing
edge of the blade, which was subject to various configurations in order to simulate
different degrees of damage. Excitation was performed in two ways: near the
delamination zone in a simulation of operational wind excitations, and with a bar
designed to excite torsional modes of the wind turbine blade.
We compare the data collected from the wireless sensors against wired sensors to
demonstrate their performance. We explore methods for determining damage. We first
explore results of autoregressive coefficients for indicating damage levels. Finally, we
demonstrate the use of damage sensitive features from the wavelet transforms of input
and output signals to provide a method suitable for nonstationary blade excitations.
Original language | English |
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Title of host publication | Proceedings of the 7th European Workshop on Structural Health Monitoring |
Number of pages | 8 |
Publication date | 2014 |
Pages | 1863-1870 |
Publication status | Published - 2014 |
Event | European Workshop on Structural Health Monitoring - Nantes, France Duration: 8 Jul 2014 → 11 Jul 2014 http://www.ewshm2014.com/ |
Workshop
Workshop | European Workshop on Structural Health Monitoring |
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Country/Territory | France |
City | Nantes |
Period | 08/07/2014 → 11/07/2014 |
Internet address |
Keywords
- Structural Health Monitoring
- Damage Detection
- Wind Turbine
- Wireless sensing
- Wavelets