Method and system for controlling setpoints of manipulated variables for process optimization under constraint of process-limiting variables
First Claim
1. A method for determining a setpoint for a manipulated variable for a process being controlled, the determination based at least in part on one or more performance limiting process parameters, comprising:
- a. determining an actual rate of change of a performance limiting process parameter;
b. calculating a predicted rate of change for the performance limiting process parameter for a predetermined future time interval; and
c. adjusting a setpoint for the manipulated variable to optimize the process being controlled to reflect a current value of the performance limiting process parameter, the actual rate of change of the performance limiting process parameter, and the predicted rate of change of the performance limiting process parameter.
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Accused Products
Abstract
A system, method, and article of manufacture suitable for determining setpoints of the control variables to optimize the process while taking into account the process-limiting variables in applications where responses are highly non-linear. In a preferred embodiment, the method comprises determining an actual rate of change of a performance limiting process parameter; calculating a predicted rate of change for the performance limiting process parameter for a predetermined future time interval; and adjusting a setpoint for the control variables to optimize the process while taking into account the performance limiting process parameter using the actual rate of change and the predicted rate of change.
30 Citations
16 Claims
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1. A method for determining a setpoint for a manipulated variable for a process being controlled, the determination based at least in part on one or more performance limiting process parameters, comprising:
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a. determining an actual rate of change of a performance limiting process parameter;
b. calculating a predicted rate of change for the performance limiting process parameter for a predetermined future time interval; and
c. adjusting a setpoint for the manipulated variable to optimize the process being controlled to reflect a current value of the performance limiting process parameter, the actual rate of change of the performance limiting process parameter, and the predicted rate of change of the performance limiting process parameter. - View Dependent Claims (2, 3, 4, 5)
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6. A system for process control, comprising:
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a. a process controller comprising a processing unit and data store;
b. a controllable device operatively connected to the process controller;
c. a sensor operatively connected to the process controller;
d. data stored in the data store comprising values representative of actual and predicted rates of change of at least one performance limiting process parameter; and
e. process control software executing in the process controller, the process control software capable of calculating a predicted rate of change for the performance limiting process parameter for a predetermined future time interval and adjusting a setpoint for a manipulated variable to optimize a process being controlled, the adjusted setpoint reflecting a current value of the performance limiting process parameter, the actual rate of change of the performance limiting process parameter, and the predicted rate of change of the performance limiting process parameter. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A system for process control, comprising:
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a. means for controlling a process, the means for controlling a process further comprising;
i. means for processing data; and
ii. means for storing data, the data comprising data representative of actual and predicted rates of change of a performance limiting process parameter;
b. a controllable device operatively connected to the means for controlling a process;
c. means for sensing a condition, the means for sensing operatively connected to the means for process control; and
d. process control software, operative in the data processing means, for obtaining a sensed condition for the means for sensing, calculating a predicted rate of change for the performance limiting process parameter for a predetermined future time interval, and adjusting a setpoint for a manipulated variable to optimize a process being controlled, the adjusted setpoint reflecting both the performance limiting process parameter actual rate of change and the performance limiting process parameter predicted rate of change. - View Dependent Claims (15)
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16. A computer program embodied within a computer-readable medium created using the method of claim.
Specification