ABSTRACT
Relative to the unbalanced load caused by wind shear, experts at home and abroad have been done full research. The combination of pitch-regulation based on the azimuth angle and advanced controllers was designed in [9] [10] to solve the problem, but ignored the mechanical fatigue. Bossanyi E. et al. [11], developed an active control strategy to alleviate the unbalanced load. The controller transformed the singles measured into d-and q-axes by a special transformation. Each axis controlled by a PI controller working in a feed-forward Filter separately, but the measurement requirement of this method is higher, and there may be a delay.
