Adaptation to unmeasured variables
First Claim
1. A controller, comprising:
- a plurality of model controllers, each of the plurality of model controllers coupled to receive a plurality of monitored signals, each of the plurality of model controllers to generate a control signal; and
a data evaluator coupled to receive the plurality of monitored signals and generate an output, the data evaluator to determine when sufficient information from the plurality of monitored signals is received, the data evaluator coupled to select the control signal of one of the plurality of model controllers based on the output of the data evaluator, and wherein the data evaluator comprises a model hypothesis tester and test confidence indicator.
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Abstract
A scheme for management of uncertainty in control systems that require adaptation is described. The scheme removes as much uncertainty as possible at design time and manufacturing time by taking advantage of available compute resources in pre-computing a large set of robustness-performance tradeoff based model controllers at different operating conditions for different values of uncertainty parameters that occur in-use and in manufacturing. A group of control models, and corresponding model controllers with an uncertainty bound larger than the best-tuned controller, are generated. A subset of the model controllers is implemented in the system at manufacturing time based on characterization of the system. The subset of model controllers is switched at run time based on transient information received during operation of the system.
65 Citations
12 Claims
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1. A controller, comprising:
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a plurality of model controllers, each of the plurality of model controllers coupled to receive a plurality of monitored signals, each of the plurality of model controllers to generate a control signal; and
a data evaluator coupled to receive the plurality of monitored signals and generate an output, the data evaluator to determine when sufficient information from the plurality of monitored signals is received, the data evaluator coupled to select the control signal of one of the plurality of model controllers based on the output of the data evaluator, and wherein the data evaluator comprises a model hypothesis tester and test confidence indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A controller, comprising:
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a plurality of model controllers, each of the plurality of model controllers coupled to receive a plurality of monitored signals, each of the plurality of model controllers to generate a control signal; and
a data evaluator coupled to receive the plurality of monitored signals and generate an output, the data evaluator to determine when sufficient information from the plurality of monitored signals is received, the data evaluator coupled to select the control signal of one of the plurality of model controllers based on a generalized likelihood ratio test with frequency weighting to reflect closed-loop performance sensitivity to variations in a plant model, and wherein the data evaluator comprises a test confidence indicator to delay switching among the plurality of model controllers until confidence in a hypothesis test is high. - View Dependent Claims (9, 10, 11, 12)
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Specification