Adaptive model-based control systems and methods for controlling a gas turbine
First Claim
1. An adaptive model-based control method for controlling a gas turbine engine to optimize either performance or operability of the engine, the method comprising:
- a) obtaining information about the current state of the engine;
b) updating model data information about the engine in a model in an adaptive model-based control system to reflect the current state of the engine;
c) comparing the information about the current state of the engine with the model data information about the engine in the model;
d) diagnosing sensor, actuator, engine, and subsystem information and passing any updated information to a master mode selector and a reconfigurable control;
e) reconfiguring a correct form of the model, constraints, objective function and predetermined control parameters;
f) determining an optimal corrective control action to take given the current state of the engine, the objective function, and the constraints of the engine;
g) outputting a control command to implement the optimal corrective control action;
h) repeating steps a)-g) as necessary to ensure the objective function of the engine is optimized at all times.
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Abstract
Adaptive model-based control systems and methods are described so that performance and/or operability of a gas turbine in an aircraft engine, power plant, marine propulsion, or industrial application can be optimized under normal, deteriorated, faulted, failed and/or damaged operation. First, a model of each relevant system or component is created, and the model is adapted to the engine. Then, if/when deterioration, a fault, a failure or some kind of damage to an engine component or system is detected, that information is input to the model-based control as changes to the model, constraints, objective function, or other control parameters. With all the information about the engine condition, and state and directives on the control goals in terms of an objective function and constraints, the control then solves an optimization so the optimal control action can be determined and taken. This model and control may be updated in real-time to account for engine-to-engine variation, deterioration, damage, faults and/or failures using optimal corrective control action command(s).
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Citations
47 Claims
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1. An adaptive model-based control method for controlling a gas turbine engine to optimize either performance or operability of the engine, the method comprising:
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a) obtaining information about the current state of the engine;
b) updating model data information about the engine in a model in an adaptive model-based control system to reflect the current state of the engine;
c) comparing the information about the current state of the engine with the model data information about the engine in the model;
d) diagnosing sensor, actuator, engine, and subsystem information and passing any updated information to a master mode selector and a reconfigurable control;
e) reconfiguring a correct form of the model, constraints, objective function and predetermined control parameters;
f) determining an optimal corrective control action to take given the current state of the engine, the objective function, and the constraints of the engine;
g) outputting a control command to implement the optimal corrective control action;
h) repeating steps a)-g) as necessary to ensure the objective function of the engine is optimized at all times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An adaptable model-based control system for controlling a gas turbine engine to optimize either performance or operability of the engine, the system comprising:
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a) a means for obtaining information about the current state of the engine;
b) a means for updating model data information about the engine in a model in an adaptive model-based control system to reflect the current state of the engine;
c) a means for comparing the information about the current state of the engine with the model data information about the engine in the model;
d) a means for diagnosing sensor, actuator, engine, and subsystem information and passing any updated information to a master mode selector and a reconfigurable control;
e) a means for reconfiguring a correct form of the model, constraints, objective function and predetermined control parameters;
f) a means for determining an optimal corrective control action to take given the current state of the engine, the objective function, and the constraints of the engine;
g) a means for outputting a control command to implement the optimal corrective control action;
h) a means for repeating steps a)-g) as necessary to ensure the objective function of the engine is optimized at all times. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An adaptable model-based control system capable of controlling a gas turbine engine to optimize either performance or operability of the engine, the control system comprising:
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at least one model capable of representing system behavior;
at least one estimator capable of determining a current state of the engine and adapting the model for engine-to-engine variation and deterioration;
at least one fault diagnostic capable of detecting and classifying faults and damage and providing a probability of faults;
at least one reconfigurable model-based control capable of utilizing an optimization to control engine manipulated variables to ensure optimal operation of the engine within constrained operating space; and
a master mode selector capable of modifying at least one of;
an objective function, a constraint, a reference, a model and a model structure using information from at least one of;
an operator, a supervisory control, and fault diagnostics.- View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification