Changes
/* Wind Turbine Control Systems */
|-
|rowspan="2" align = "center" bgcolor = "#DCE6F1"|'''Description'''
|-valign="top' bgcolor = "#DCE6F1"|A method of controlling the speed of a wind turbine by varying the orientation, or pitch, of the blades, and thereby altering its aerodynamics and efficiency.
Source:[http://www.moog.com/markets/energy/wind-turbines/blade-pitch-control/ Blade Pitch Control]
|bgcolor = "#DCE6F1"|The rotation of horizontal axis wind turbine around its tower to orient the turbine in upwind or down wind direction.
