System and method for controlling a gas turbine engine
AssigneeUnited Technologies Corporation
InventorChaohong Cai
Life of this patent
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Abstract
A control system for a gas turbine engine including a power turbine is disclosed. The control system may include a control module to receive engine operating goals and an estimated current engine state, wherein the estimated current engine state is produced by a model-based estimation module using a bandwidth signal produced by an adaptation logic module. The control module is operative to determine fuel flow, inlet guide vane schedules and stability bleed schedules based at least in part on the received engine operating goals and the estimated current engine state, and to send signals to a gas generator of the gas turbine engine in order to control the gas generator according to the determined fuel flow, inlet guide vane schedules and stability bleed schedules.
Claims20
A control system for a gas turbine engine, the control system comprising:
- a first sensor configured to generate a thrust lever angle signal indicative of a thrust lever angle commanded of the gas turbine engine;
- a second sensor in communication with the gas turbine engine and configured to generate at least one operating parameter signal indicative of at least one operating parameter of the gas turbine engine;
- a power rating module configured to receive the thrust lever angle signal and generate at least one goal signal indicative of an operating point goal for the gas turbine engine;
- an adaptation logic module configured to receive the at least one goal signal and the at least one operating parameter signal and generate a bandwidth signal indicative of an error between the at least one goal signal and the at least one operating parameter signal;
- a model-based estimation module configured to receive the bandwidth signal and generate an engine estimate signal indicative of estimated current engine parameters of the gas turbine engine based at least in part on the bandwidth signal;
- and
- a model-based control module configured to receive the at least one operating parameter signal, the at least one goal signal, and the engine estimate signal and to determine at least one of fuel flow, inlet guide vane schedules and stability bleed schedules based at least in part on the received at least one operating parameter signal, the at least one goal signal and the engine estimate signal, and to send effector signals to a gas generator of the gas turbine engine in order to control the gas generator according to at least one of the determined fuel flow, inlet guide vane schedules and stability bleed schedules.
A control system for a gas turbine engine including a power turbine, the control system comprising:
- a sensor in communication with the gas turbine engine and configured to generate at least one operating parameter signal indicative of at least one operating parameter of the gas turbine engine;
- a load control module configured to receive a desired power turbine speed signal and to output a power turbine torque request (Qpt_req);
- and
- an adaptation logic module configured to receive the desired power turbine speed signal and the at least one operating parameter signal and generate a bandwidth signal indicative of an error between the desired power turbine speed signal and the at least one operating parameter signal;
- a model-based estimation module configured to receive the bandwidth signal and generate an engine estimate signal indicative of estimated current engine parameters of the gas turbine engine based at least in part on the bandwidth signal;
- and
- a gas generator control module configured to receive the power turbine torque request (Qpt_req) from the load control module and the estimated current engine parameters from the model-based estimation module, to determine at least one of fuel flow, inlet guide vane schedules, and stability bleed schedules based at least in part on the received power turbine torque request (Qpt_req) and the estimated current engine parameters, and to send signals to a gas generator of the gas turbine engine in order to control the gas generator according to at least one of the determined fuel flow, inlet guide vane schedules and stability bleed schedules.
Dependencies are inferred from the claim text.