Closed-loop Control of Biaxial Fatigue Loading of Wind Turbine Blades Based on Visual Inspection

Abstract Based on the inertial vibration excitation device, a biaxial fatigue loading system for wind turbine blades is established by using visual inspection technology and virtual spindle decoupling to control motion of blades. The image feature point tracking method used detect blade state. Considering frequency characteristics, phase difference between exciting force displacement detected based detector, resonance adaptively tracked achieve accurate double-free amplitude blade. test shows that can maintain error blade, adaptive reliable effective, accuracy reliability are improved.