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US 10,961,922 B2Granted
Systems and methods for power turbine governing
AssigneeRaytheon Technologies Corporation
InventorsRichard P. Meisner, Chaohong Cai, Timothy J. Crowley
Life of this patent
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Abstract
A power turbine control system for a gas turbine engine may comprise a controller comprising one or more processors in communication with the gas turbine engine. The processors may comprise an engine control module configured to receive a torque request signal and generate a torque achieved signal. A rate of change of power turbine speed estimation module may generate an estimated rate of change of power turbine speed signal. A dynamic inversion power turbine governor module may generate the torque request signal based on the torque achieved signal and estimated rate of change of power turbine speed signal.
Claims14
A power turbine control system for a gas turbine engine, comprising:
- a controller comprising one or more processors in communication with the gas turbine engine, the one or more processors comprising:
- an engine control module configured to:
- receive a torque request signal,
- determine at least one of a fuel flow, a guide vane schedule, or a bleed schedule based on the torque request signal, and
- generate a torque achieved signal based, at least in part, on the at least one of the fuel flow, the guide vane schedule, or the bleed schedule;
- a rate of change of power turbine speed estimation module configured to receive a power turbine speed signal and the torque achieved signal, wherein the rate of change of power turbine speed estimation module is configured to generate an estimated rate of change of power turbine speed signal based on the power turbine speed signal, the torque achieved signal, and an estimated power turbine torque load signal;
- and
- a dynamic inversion power turbine governor module configured to receive the estimated rate of change of power turbine speed signal and the torque achieved signal, wherein the dynamic inversion power turbine governor module is configured to:
- receive a target power turbine speed signal,
- determine a desired rate of change of power turbine speed error signal based on a difference between the target power turbine speed signal and the power turbine speed signal,
- determine a difference between the desired rate of change of power turbine speed error signal and the estimated rate of change of power turbine speed signal, and
- generate the torque request signal using the torque achieved signal and the difference between the desired rate of change of power turbine speed error signal and the estimated rate of change of power turbine speed signal.
9 more elements
A method of controlling a power turbine, comprising:
- receiving, by an engine control module of a controller, a torque request signal;
- determining, by the engine control module, at least one of a fuel flow, a guide vane schedule, or a bleed schedule based on the torque request signal;
- generating, by the engine control module, a torque achieved signal using the at least one of the fuel flow, the guide vane schedule, or the bleed schedule;
- receiving, by a rate of change of power turbine speed estimation module of the controller, a power turbine speed signal and the torque achieved signal;
- generating, by the rate of change of power turbine speed estimation module, an estimated rate of change of power turbine speed signal based on the power turbine speed signal, the torque achieved signal, and an estimated power turbine torque load signal;
- receiving, by a dynamic inversion power turbine governor module of the controller, the estimated rate of change of power turbine speed signal and the torque achieved signal;
- receiving, by the dynamic inversion power turbine governor module, a target power turbine speed signal;
- determining, by the dynamic inversion power turbine governor module, a desired rate of change of power turbine speed error signal based on a difference between the target power turbine speed signal and the power turbine speed signal;
- determining, by the dynamic inversion power turbine governor module, a difference between the desired rate of change of power turbine speed error signal and the estimated rate of change of power turbine speed signal;
- and
- generating, by the dynamic inversion power turbine governor module, the torque request signal using the torque achieved signal and the difference between the desired rate of change of power turbine speed error signal and the estimated rate of change of power turbine speed signal.
8 more elements
Dependencies are inferred from the claim text.