Full Field Dynamic Strain on Wind Turbine Blade Using Digital Image Correlation Techniques and Limited Sets of Measured Data from Photogrammetric Targets

2014 ◽  
pp. 317-328
Author(s):  
Jennifer Carr ◽  
Christopher Niezrecki ◽  
Peter Avitabile
Keyword(s):  
Digital Image Correlation ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Digital Image ◽  
Measured Data ◽  
Image Correlation ◽  
Dynamic Strain ◽  
Full Field ◽  
Field Dynamic ◽  
Correlation Techniques

Full-field inspection of a wind turbine blade using three-dimensional digital image correlation

2011 ◽  
Author(s):  
Bruce LeBlanc ◽  
Christopher Niezrecki ◽  
Peter Avitabile ◽  
Julie Chen ◽  
James Sherwood ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Digital Image ◽  
Three Dimensional ◽  
Wind Turbine Blade ◽  
Image Correlation ◽  
Full Field ◽  
Field Inspection

Error Assessment of Blade Deformation Measurements on a Multi-Megawatt Wind Turbine Based on Digital Image Correlation

2015 ◽  
Author(s):  
Jan Winstroth ◽  
Joerg R. Seume
Keyword(s):  
Digital Image Correlation ◽  
Wind Turbine ◽  
Error Estimation ◽  
Digital Image ◽  
Rotor Blades ◽  
Image Correlation ◽  
Optical Measurements ◽  
Full Field ◽  
Out Of Plane ◽  
Plane Bending

Optical full-field measurement methods such as Digital Image Correlation (DIC) provide a new opportunity for measuring deformation and vibration in wind turbine rotor blades during operation, in high spatial and temporal resolution. Recent field tests on a multi-megawatt wind turbine have demonstrated the vast potential for full scale testing, however little is known about the overall accuracy of DIC measurements on wind turbines. The present work proposes using a virtual 3D wind turbine model for estimating the error associated with the optical measurements. The entire setup is simulated a priori and accurate error estimation becomes possible. The error estimation for a 3.2 MW wind turbine suggests that relative out-of-plane bending of the rotor blades can be measured with an accuracy of ±9.1 mm, relative in-plane bending of the rotor blades can be measured with an accuracy of ±10.2 mm, and relative blade torsion can be measured with an accuracy of ±0.07 deg. This corresponds to a relative error of 0.46% for out-of-plane bending, 1.11% for in-plane bending and 5.46% for blade torsion.

Sign in / Sign up

Export Citation Format

Share Document