Lifing and performance optimization limit management for turbine engine
First Claim
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1. A controller for a turbine engine system including a multi-shaft turbine engine including at least two shafts and one or more electrical machines coupled to each of the at least two shafts, the controller comprising:
- a limit management optimizer configured to;
determine a first operating point for the turbine engine system associated with a first vehicle operating mode based on a first optimization objective, wherein the first operating point is indicative of a first available power value for thrust, and wherein the first optimization objective comprises at least one of efficiency, lifing, reliability, or stability;
determine a second operating point for the turbine engine system associated with a second vehicle operating mode based on a second optimization objective having a higher priority than the first optimization objective, wherein the second operating point is indicative of load shedding to increase available power for thrust by reducing electrical power supplied by the one or more electrical machines to an electrical component, and wherein the second optimization objective comprises available power; and
communicate control signals to one or more system controllers for the system to achieve the first operating point and the second operating point, and wherein the one or more system controllers achieve the first operating point and the second operating point with the turbine engine system in response to the control signals;
wherein each of the first operating point and the second operating point represents an objective trade-off involving a modification of the optimization objective to maintain component limits or a modification of one or more of the component limits, wherein each component limit comprises a bound on an operating condition of a component of the turbine engine system.
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Abstract
A control for a multi-shaft turbine engine system using electrical machines seeks optimal system performance while accommodating hard and soft component limits. To accommodate the component limits, the control may generate a number of possible operating point options reflecting potential trade-offs in performance, lifting, efficiency, or other objectives.
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Citations
13 Claims
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1. A controller for a turbine engine system including a multi-shaft turbine engine including at least two shafts and one or more electrical machines coupled to each of the at least two shafts, the controller comprising:
a limit management optimizer configured to; determine a first operating point for the turbine engine system associated with a first vehicle operating mode based on a first optimization objective, wherein the first operating point is indicative of a first available power value for thrust, and wherein the first optimization objective comprises at least one of efficiency, lifing, reliability, or stability; determine a second operating point for the turbine engine system associated with a second vehicle operating mode based on a second optimization objective having a higher priority than the first optimization objective, wherein the second operating point is indicative of load shedding to increase available power for thrust by reducing electrical power supplied by the one or more electrical machines to an electrical component, and wherein the second optimization objective comprises available power; and communicate control signals to one or more system controllers for the system to achieve the first operating point and the second operating point, and wherein the one or more system controllers achieve the first operating point and the second operating point with the turbine engine system in response to the control signals; wherein each of the first operating point and the second operating point represents an objective trade-off involving a modification of the optimization objective to maintain component limits or a modification of one or more of the component limits, wherein each component limit comprises a bound on an operating condition of a component of the turbine engine system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling a turbine engine system including a multi-shaft turbine engine including at least two shafts and one or more electrical machines coupled to each of the at least two shafts, the method comprising:
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determining, by a controller of the turbine engine system, a first operating point for the turbine engine system associated with a first vehicle operating mode based on a first optimization objective, wherein the first operating point is indicative of a first available power value for thrust, and wherein the first optimization objective comprises at least one of efficiency, lifing, reliability, or stability; determining, by the controller, a second operating point for the turbine engine system associated with a second vehicle operating mode based on a second optimization objective having a higher priority than the first optimization objective, wherein the second operating point is indicative of load shedding to increase available power for thrust by reducing electrical power supplied by the one or more electrical machines to an electrical component, and wherein the second optimization objective comprises available power; communicating, by the controller, control signals to one or more system controllers for the system to achieve the first operating point and the second operating point; and achieving, by the one or more system controllers, the first operating point and the second operating point with the turbine engine system in response to the control signals; wherein each of the first operating point and the second operating point represents an objective trade-off involving a modification of the optimization objective to maintain component limits or a modification of one or more of the component limits, wherein each component limit comprises a bound on an operating condition of a component of the turbine engine system. - View Dependent Claims (10, 11, 12, 13)
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Specification