Research on the Follow-Up Control Strategy of Biaxial Fatigue Test of Wind Turbine Blade Based on Electromagnetic Excitation

Aiming at the drift problem that tracking control of actual load relative to target during electromagnetic excitation biaxial fatigue test wind turbine blades is easy drift, a testing machine for designed, and following strategy studied. A Fast Transversal Recursive Least Squares algorithm based on fuzzy logic (Fuzzy FTRLS) proposed develop loading dynamic strategy, which adjusts forgetting factor in through overcome contradiction between convergence accuracy speed solve phenomenon amplitude overshoot phase lag load. Combined with previous research results, simulation model was constructed verify strategy’s effectiveness. Field tests were carried out its follow-up effect. The results show error flapwise edgewise direction within 4%, has better robustness static performance than traditional (RLS) algorithm.