A stress recovery procedure for 3-D linear finite elements

In this thesis, a stress recovery procedure for 3-D linear finite elements is presented. The formulation is based on a modified version of the Hu-Washizu variational principle, in which the recovered stresses are calculated by minimizing the error with respect to the directly-computed stresses, and ensuring that the recovered stresses satisfy...

Feedforward Learning Control for Individual Blade Pitch Control of Modern Two-Bladed Wind Turbines

Wind is arguably the most promising source of sustainable energy. However, it is still considered to be an expensive option compared to fossil fuels. Recent developments have achieved significant cost reductions and increased the reliability on wind energy. The main reason for this has been the application of innovative and effective control...