United Technologies Corporation

Eugenio DiValentin

Roy W Schneider

An aircraft propeller speed control defines values for propeller speed governing control law parameters, such as gains and dynamic compensations, based on known values of propeller and engine dynamic characteristics over the complete propeller operating envelope. Adjusting control law gains and dynamic compensations as functions of propeller and engine dynamic characteristics over the entire flight envelope provides for control of propeller speed to obtain optimum stability and consistent propulsion performance over the entire flight envelope.

Propeller speed control having control parameters based on system

A ground mode pitch position logic and control is shown and described in this invention. A method for scheduling and limiting the pitch actuator reference signal in accordance with the actuator commanded schedule, propeller overspeed and propeller underspeed.

Ground mode control of aircraft propeller speed and pitch

A propeller speed governor having a derivative feedback of propeller speed and having a means such as a switch to open the derivative feed back loop when airspeed exceeds a predetermined amount is shown and described. This derivative inhibit is used to provide improved dynamic compensation at high and low speeds.

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Enfield, CT, United States of America

Eugenio DiValentin