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Method and apparatus for controlling force fights in a rotating shaft

Image Number 4 for United States Patent #6227481.

An improved tilting rotor aircraft, a control system for an elongated shaft, and a method of controlling an elongated shaft are provided. Sensors are utilized to detect an amount of twist on a flexible and elongated shaft. A controller receives the signal and generates a command signal. A plurality of actuators receive the command signals and compensate for the twist in the flexible and elongated shaft.

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