The lower rotor functions similarly to a conventional main rotor, with three hydraulic servos transmitting inputs via a swashplate mechanism to change the blades’ pitch. The upper rotor mirrors ...

The primary parameters to be controlled in wind turbines are the blade pitch angle and the generator torque. The challenges in designing the pitch controller include various non-linearities of wind ...

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Therefore, it is crucial to take into account the mechanical pieces of the turbine, namely the gearbox and the blades, in order to maximize the aerodynamic power. Figure 3. Subsystem-level block ...

Barring the smallest manned airplanes, most aircraft that are pulled around by a prop have variable pitch propellers. The reason for this is simple efficiency. Internal combustion engines are most ...