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US 11,644,814 B2Granted
Method and apparatus for coordinating the utilization of operational zones to achieve production goals
AssigneeABB Schweiz AG
InventorsShih-Chin Chen, Abhay Anand, Balaji Sr
Life of this patent
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Abstract
A system, method, and apparatus is provided for production processes to coordinate the utilization of the operational zone for process variables and automate the execution of the target settings to maximize the production goals without requiring human intervention.
Claims18
A method of coordinating operational zones of common process variables in a production process, the method comprising:
- categorizing preferences of each common process variable with respect to a) a target if the common process variable has a target setting, or b) one or more preferences if the common process variables does not have a target setting;
- determining an operational zone for each common process variable between high and low operational zone limits for each common process variable;
- determining a reference target for each common process variable;
- devising a cost function as a weighted sum of a deviation variance of each common process variable from its reference target;
- combining the operational zone and a response model of the common process variables as a set of combined constraints of the common process variables;
- performing a constrained optimization on the devised cost function subject to the set of combined constraints to determine optimized results for the common process variables;
- and
- setting the optimized results as new target settings for a multivariable feedback controller that controls the production process,
- wherein the cost function is:
- J=(x−xr)TW(x−xr),
- where x is the common process variable including input variables and output variables, x4 is the reference target for each common process variable, and W is a diagonal matrix where each diagonal element specifies a weight factor of each component of x.
8 more elements
A computer system operable for coordinating the utilization of operational zones for a production process, the computer system comprising:
- one or more processors;
- and
- a non-transitory computer-readable medium having processor-executable instructions stored thereon, wherein the processor-executable instructions, when executed by the one or more processors, facilitate:
- categorizing preferences of each common process variable with respect to a) a target if the common process variable has a target setting, or b) one or more preferences if the common process variables does not have a target setting;
- determining an operational zone between high and low operational zone limits for each common process variable to and from the production process;
- determining a reference target for each common process variable;
- devising a cost function as a weighted sum of a deviation variance of each common process variable from its reference target;
- combining the operational zone limits and the response model of the process as a set of combined constraints of the common process variables;
- performing a constrained optimization on the devised cost function subject to the set of combined constraints to determine optimized results for the common process variables;
- and
- setting the optimized results as new target settings for a multivariable feedback controller that controls the production process,
- wherein the cost function is:
- J=(x−xr)TW(x−xr),
- where x is the common process variable including input variables and output variables, xr is the reference target for each common process variable, and W is a diagonal matrix where each diagonal element specifies a weight factor of each component of x.
11 more elements
Dependencies are inferred from the claim text.