Turboprop erroneous blade angle reading accommodation through minimum torque governing
AssigneePratt & Whitney Canada Corp.
InventorsRoja Tabar, Louis Duranleau-Hendrickx
Life of this patent
Estimating the term…
Abstract
An erroneous turboprop blade angle accommodation system includes a sensor configured to output a beta signal in response to adjusting a rotational pitch of a rotatable propeller blade, and a controller in signal communication with the sensor to receive the beta signal. The controller is configured to determine a beta angle of the rotatable propeller blade based on the beta signal and to control the rotational pitch based on an activated beta control logic. The controller is further configured to detect a beta error of the beta angle and to deactivate the beta control logic in response to detecting the beta error.
Claims16
An erroneous turboprop blade angle accommodation system comprising:
- a sensor configured to output a beta signal in response to adjusting a rotational pitch of a rotatable propeller blade;
- and
- a controller in signal communication with the sensor to receive the beta signal, the controller configured to determine a beta angle of the rotatable propeller blade based on the beta signal and to control the rotational pitch based on an activated beta control logic,
- wherein the controller is configured to detect a beta error of the beta angle and to deactivate the beta control logic in response to detecting the beta error,
- wherein the rotational pitch of the propeller blade is controlled by a minimum torque control scheme in response to deactivating the beta control logic, and
- wherein the controller controls an engine that drives a propeller that supports the propeller blade, and the minimum torque control scheme maintains torque produced by the engine at a minimum torque that maintains the propeller blade in the forward position.
A method of accommodating an erroneous turboprop blade angle, the method comprising:
- adjusting, by a controller, a rotational pitch of a rotatable propeller blade based on an activated beta control logic;
- outputting, from a sensor, a beta signal in response to adjusting the rotational pitch of the rotatable propeller blade;
- determining, by a controller, a beta angle of the rotatable propeller blade based on the beta signal;
- detecting, by the controller, a beta error of the beta angle, and deactivating the beta control logic in response to detecting the beta error;
- using the controller to control an engine that drives a propeller that supports the propeller blade and to control, and to use a minimum torque control scheme to:
- control the rotational pitch of the propeller blade in response to deactivating the beta control logic;
- and
- maintain torque produced by the engine at a minimum torque which maintains the propeller blade in the forward position.
Dependencies are inferred from the claim text.