Gas turbine engine fixed collective takeoff compensation control system and method
AssigneeHoneywell International Inc.
InventorGuerry Buehman
Life of this patent
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Abstract
A system and method of controlling a gas turbine engine controller in a rotorwing aircraft includes determining when a fixed collective takeoff (FCTO) of the rotorwing aircraft is being conducted. A control loop gain of the gas turbine engine controller is at least selectively varied when the FCTO is being conducted.
Claims19
A method of controlling a gas turbine engine controller in a rotorwing aircraft that includes a gas turbine engine, an engine throttle, and a collective, the method comprising the steps of:
- determining when a fixed collective takeoff (FCTO) of the rotorwing aircraft is being conducted;
- and
- when the FCTO is being conducted, at least selectively varying a control loop gain of the gas turbine engine controller,
- wherein the step of determining when the FCTO is being conducted comprises:
- determining that the collective is positioned at a collective pitch that is less than a predetermined collective pitch;
- and
- determining that the engine throttle is positioned at a throttle position that is less than a predetermined throttle position.
A gas turbine engine control system for a rotorwing aircraft, comprising:
- fixed collective takeoff (FCTO) determination logic, the FCTO determination logic operable to determine when a FCTO is being conducted and, when a FCTO is being conducted, supply a FCTO enable signal;
- a gas turbine engine controller operable to control the speed of a gas turbine engine, the gas turbine engine controller coupled to the FCTO determination logic and operable to supply a speed error signal representative of a difference between actual gas turbine engine speed and commanded gas turbine engine speed;
- and
- gain multiplier logic coupled to receive the speed error signal and the FCTO enable signal and operable, upon receipt thereof, to supply variable control loop gain multipliers.
A method of controlling a gas turbine engine controller in a rotorwing aircraft, the gas turbine engine controller including a proportional gain and a derivative gain, the method comprising the steps of:
- determining when a fixed collective takeoff (FCTO) of the rotorwing aircraft is being conducted;
- and
- when the FCTO is being conducted, at least selectively varying a control loop gain of the gas turbine engine controller by at least selectively varying the proportional gain and at least selectively varying the derivative gain.
Dependencies are inferred from the claim text.