System and method for design and control of engineering systems utilizing component-level dynamic mathematical model
First Claim
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1. A control system comprising:
- an actuator for positioning a control device comprising a control surface, wherein the actuator positions the control surface in order to control a model state and wherein the model state describes a spool speed;
a control law for directing the actuator as a function of a model output, anda closed-loop model processor for generating the model output, the closed-loop model processor comprising;
an open loop module for generating the model output as a function of the model state, a constraint on the model state and a model input, wherein the constraint on the model state is based on flow continuity;
a corrector output module for generating a corrector output as a function of the model output;
a comparator for generating an error by comparing the corrector output to the model input; and
a model state estimator for generating the model state as a function of the error, such that the error is minimized;
wherein the spool speed has a response time greater than a cycle time of the closed-loop model processor.
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Abstract
A control system comprises a controller for positioning an actuator in a working fluid flow and a model processor for directing the controller as a function of a model feedback. The model processor comprises an output module, a comparator and an estimator. The output module generates the model feedback as a function of a constraint, a model state and a model input describing fluid parameters measured along the working fluid flow. The comparator generates an error by comparing the model feedback to the model input. The estimator generates the constraint and the model state, such that the error is minimized.
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Citations
25 Claims
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1. A control system comprising:
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an actuator for positioning a control device comprising a control surface, wherein the actuator positions the control surface in order to control a model state and wherein the model state describes a spool speed; a control law for directing the actuator as a function of a model output, and a closed-loop model processor for generating the model output, the closed-loop model processor comprising; an open loop module for generating the model output as a function of the model state, a constraint on the model state and a model input, wherein the constraint on the model state is based on flow continuity; a corrector output module for generating a corrector output as a function of the model output; a comparator for generating an error by comparing the corrector output to the model input; and a model state estimator for generating the model state as a function of the error, such that the error is minimized; wherein the spool speed has a response time greater than a cycle time of the closed-loop model processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling flow through an apparatus, the method comprising:
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sensing, by a sensor, a boundary state describing the flow at a boundary of the apparatus; controlling, by a control device, an actuator state as a function of a model feedback, wherein the actuator state describes a variable control surface positioned in the flow; generating, by a processor, the model feedback as a function of the boundary state and the actuator state and a physical state of the apparatus; correcting, by the processor, the model feedback for error based on the boundary state; and estimating, by the processor, the physical state by minimizing the error, such that the flow is controlled; wherein the physical state comprises a steady state of the apparatus, and wherein the steady state has a response time greater than a cycle time of the method. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for controlling a rotational state of an apparatus, the system comprising:
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a sensor for sensing a boundary state of the apparatus, wherein the boundary state describes flow through the apparatus at one of an inlet boundary of the apparatus and an outlet boundary of the apparatus; an actuator for changing a control state within the apparatus, in order to alter the boundary state; a output module for generating an output vector as a function of an input vector, a constraint vector and the rotational state, wherein the input vector describes the boundary state of the apparatus and the control state within the apparatus, and wherein the constraint vector describes the flow at an intermediate location between the inlet boundary and the outlet boundary; a comparator for generating an error vector by comparing the output vector to the input vector; an estimator for estimating the rotational state by minimizing the error vector, wherein the estimator further estimates the constraint vector and the constraint vector constrains the rotational state based on flow continuity, and wherein the estimator minimizes the error vector based on a tensor function of a gain matrix; and a controller for controlling the actuator based on the output vector, such that the system controls the rotational state of the apparatus. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification