Over the relatively long history of the development of wind turbines, blade pitch control is something that has only recently been implemented to improve the availability, reliability and lower the cost of wind energy production. Early wind turbines had fixed blades and no way to "feather" or protect the blades from high winds and extreme weather conditions.

The use of blade pitch control was implemented in its earliest states to maximize the power output of the individual wind turbine and to mitigate the loads on the wind turbine structure. Early forms of active blade pitch control were implemented as collective pitch. One actuator, in this case hydraulic, was used to move all blades. This kind of system mimicked the variable pitch systems used in aircraft propellers.

The next advance in the blade pitch control evolution was to install one actuator for each blade. These actuators were typically hydraulic or electric thyristor. The actuators were setting pitch angles in response to heavily filtered dynamic signals. Dynamic motion demands on all early forms of pitch control were relatively low.

Today, advances in measurement technologies and multivariable control implementations are placing increasing dynamic response demands on the blade pitch actuator systems in an ongoing effort to reduce wind turbine loads. As a result, Windurance has engineered a complete blade pitch control system that has been engineered with the most current technological advances coupled with responsive electronic servo motors to provide the industry's premiere system.