A method for reducing vibrations of a tower of a wind turbine, the method comprising: continuously determining a torsional movement of the tower based at least in part on measurements obtained from one or more sensors (102,104) by measuring, via the one or more linear acceleration sensors (102, 104), a first movement at a first location of the wind turbine, measuring, via the one or more linear acceleration sensors(102, 104), a second movement at a second location of the wind turbine, and subtracting the measured first movement from the measured second movement, wherein the first location comprises a tower center and the second location comprises at least one of a posterior side of the nacelle or an anterior side of the nacelle; continuously determining, via a controller, a main pitch control command a plurality of pitch drive mechanisms of the wind turbine based on the torsional movement by: a) determining a fixed frame/Q pitch command using a secondary control device; b) transforming the fixed frame/Q pitch command into a direct-quadrature (d-q) rotating reference frame based upon a rotor position and phase correction to provide the main pitch control command; and operating the pitch drive mechanisms based on the main pitch control command so as to dampen the torsional movement of the tower. continuously determining a torsional movement of the tower based at least in part on measurements obtained from one or more sensors (102,104) by measuring, via the one or more linear acceleration sensors (102, 104), a first movement at a first location of the wind turbine, measuring, via the one or more linear acceleration sensors(102, 104), a second movement at a second location of the wind turbine, and subtracting the measured first movement from the measured second movement, wherein the first location comprises a tower center and the second location comprises at least one of a posterior side of the nacelle or an anterior side of the nacelle; measuring, via the one or more linear acceleration sensors (102, 104), a first movement at a first location of the wind turbine, measuring, via the one or more linear acceleration sensors(102, 104), a second movement at a second location of the wind turbine, and subtracting the measured first movement from the measured second movement, wherein the first location comprises a tower center and the second location comprises at least one of a posterior side of the nacelle or an anterior side of the nacelle; continuously determining, via a controller, a main pitch control command a plurality of pitch drive mechanisms of the wind turbine based on the torsional movement by: a) determining a fixed frame/Q pitch command using a secondary control device; b) transforming the fixed frame/Q pitch command into a direct-quadrature (d-q) rotating reference frame based upon a rotor position and phase correction to provide the main pitch control command; and a) determining a fixed frame/Q pitch command using a secondary control device; b) transforming the fixed frame/Q pitch command into a direct-quadrature (d-q) rotating reference frame based upon a rotor position and phase correction to provide the main pitch control command; and operating the pitch drive mechanisms based on the main pitch control command so as to dampen the torsional movement of the tower.