Patent ID: 9644606
Date: 2017-05-09
CPC Classifications: F03D,F05B,Y02E

Claim:
1. A wind turbine, comprising: a rotor comprising one or more rotor blades; a tower operatively coupled to the rotor; a pitch control system configured to reduce tower oscillations in the wind turbine, the pitch control system comprising: or approximations thereof, where J r is the moment of inertia of a rotor, δ{circumflex over (ω)} rc is a combination of the first rotor velocity component and the second rotor velocity component, δ{circumflex over ({dot over (ω)})} rc is rate of change of the combination of the first rotor velocity component and the second rotor velocity component, δ{dot over (X)} fa is the tower to velocity, and δθ twr is the second pitch angle.