A system for controlling a pitch angle of a rotor blade of a wind turbine, the system comprising: a rotor including a hub and a rotor blade; a pitch adjustment mechanism for adjusting the pitch angle of the rotor blade by rotating the rotor blade about a pitch axis relative to the hub; and a controller communicatively coupled to the pitch adjustment mechanism, the controller configured to: determine a wind asymmetry parameter based on an operating parameter of the wind turbine, the wind asymmetry parameter being indicative of an asymmetry in the wind experienced by the wind turbine; generate a wind asymmetry parameter signal indicative of the wind asymmetry parameter; determine first and second signal components (128,130) of the wind asymmetry parameter signal, the first signal component being indicative of a maximum load on a first wind turbine component, the second signal component being indicative of fatigue on a second wind turbine component, wherein the controller is configured to filter the wind asymmetry parameter signal to determine the first and second signal components; calculate a wear parameter for the first and second wind turbine components based on the first and second signal components (128,130); and initiate an adjustment of the pitch angle of the rotor blade based on the wear parameter; wherein the system controls the pitch angle of the rotor blade based on the wear parameter in a manner that distributes the wear across the first wind turbine component and the second wind turbine component. a rotor including a hub and a rotor blade; a pitch adjustment mechanism for adjusting the pitch angle of the rotor blade by rotating the rotor blade about a pitch axis relative to the hub; and a controller communicatively coupled to the pitch adjustment mechanism, the controller configured to: determine a wind asymmetry parameter based on an operating parameter of the wind turbine, the wind asymmetry parameter being indicative of an asymmetry in the wind experienced by the wind turbine; generate a wind asymmetry parameter signal indicative of the wind asymmetry parameter; determine first and second signal components (128,130) of the wind asymmetry parameter signal, the first signal component being indicative of a maximum load on a first wind turbine component, the second signal component being indicative of fatigue on a second wind turbine component, wherein the controller is configured to filter the wind asymmetry parameter signal to determine the first and second signal components; calculate a wear parameter for the first and second wind turbine components based on the first and second signal components (128,130); and initiate an adjustment of the pitch angle of the rotor blade based on the wear parameter; wherein the system controls the pitch angle of the rotor blade based on the wear parameter in a manner that distributes the wear across the first wind turbine component and the second wind turbine component. determine a wind asymmetry parameter based on an operating parameter of the wind turbine, the wind asymmetry parameter being indicative of an asymmetry in the wind experienced by the wind turbine; generate a wind asymmetry parameter signal indicative of the wind asymmetry parameter; determine first and second signal components (128,130) of the wind asymmetry parameter signal, the first signal component being indicative of a maximum load on a first wind turbine component, the second signal component being indicative of fatigue on a second wind turbine component, wherein the controller is configured to filter the wind asymmetry parameter signal to determine the first and second signal components; calculate a wear parameter for the first and second wind turbine components based on the first and second signal components (128,130); and initiate an adjustment of the pitch angle of the rotor blade based on the wear parameter; wherein the system controls the pitch angle of the rotor blade based on the wear parameter in a manner that distributes the wear across the first wind turbine component and the second wind turbine component.