Optical measurements for small rotating wind turbine blades. Both fully rotating and with rigid body motion removed. In plane x and out of plane z motions captured and identified separately. 1 - Point ...

1 - Point tracking sine excitation mode 1, 2 - Point tracking expansion for mode 1 strain, 3 - Point tracking sine excitation mode 5, 4 - Point tracking expansion for mode 5 strain ...

Bad luck strikes again. The same wind turbine blade that scattered debris across local beaches last summer was apparently struck by lightning last week. Vineyard Wind’s visual inspection showed ...