a wind turbine active damping arrangement for damping forces exerted on a component connected to a main shaft of a wind turbine is proposed . the damping arrangement comprises a smart fluid damper and a control device for controlling a field generator of the smart fluid damper to control the extent of damping according to a performance parameter of the wind turbine . the smart fluid damper comprises a closed chamber containing a smart fluid and a piston . the piston travels along a direction in the chamber and comprises a channel through which the smart fluid can flow . the smart fluid damper comprises a field generator for generating a field across the smart fluid and an input for a field generator control signal for controlling the field generator to alter the field according to the performance parameter of the wind turbine .