System and method for large transient identification for advanced control with multiple contraints
AssigneeGeneral Electric Company
InventorsManxue Lu, Thomas Charles Swager
Life of this patent
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Abstract
A method and apparatus for providing large transient identification for advanced control with multiple constraints. A request to change a current operating condition of a controlled plant is detected. A value of a control constraint corresponding to the request to change the current operating condition of the controlled plant is determined. A magnitude of a transient error corresponding to the request relative to the value of the control constraint is determined and the current operating condition of the controlled plant is adjusted based on the determined magnitude of the transient error.
Claims18
A method, comprising:
- detecting, in a controller, a primary reference input, corresponding to a request to change a current operating condition of a controlled plant;
- determining, a value of a control constraint corresponding to the request to change the current operating condition of the controlled plant;
- determining a magnitude of a transient error corresponding to the request relative to the value of the control constraint;
- generating a normalized maximum constraint error;
- generating a normalized min constraint error;
- normalizing the constraint error;
- comparing the normalized constraint error with the primary reference input;
- selecting a minimum value between the primary reference input and a normalized error of the control constraint to a maximum limit;
- selecting a maximum value between the selected minimum value and a normalized error of the control constraint to a minimum limit;
- and
- adjusting the current operating, condition of the controlled plant based on the determined magnitude of the transient error.
A control system for a controlled plant, the control system comprising:
- a control input, detector configured to detect a request to change a current operating condition of the controlled plant;
- a constraint error normalization device configured to determine, for a control constraint of the controlled plant associated with the request, a normalized error of the control constraint to a maximum limit and a normalized error of the control constraint to a minimum limit;
- and
- a controller coupled with the control input detector and constraint error normalization device, the controller being configured to:
- determine a magnitude of a transient error relative to the request to change an operating condition of the controlled, plant by comparing a value of a primary reference input corresponding to the request to the normalized error of the control constraint to the maximum limit and the normalized error of the control constraint to the minimum limit;
- generate a normalized maximum constraint error;
- generate a normalized minimum constraint error;
- select a minimum value between the value of the primary reference input and the normalized error of the control constraint to the maximum limit, and select a maximum value between the selected minimum value and the normalized error of the control constraint to the minimum limit, wherein the selected maximum value is proportional to the magnitude of the transient error;
- and
- adjust the current operating, condition of the controlled plant based on the determined magnitude of the transient error.
Dependencies are inferred from the claim text.