Methods and systems for pervasive diagnostics
First Claim
1. A production control system for controlling operation of a production system with a plant that can achieve one or more production goals, the control system comprising:
- a planner operatively coupled with the production system to provide one or more plans for execution in the plant based on at least one production goal;
a plant model operatively coupled with the planner and including a model of the plant; and
a diagnosis engine operatively coupled with the planner, the production system, and the model, the diagnosis engine operative to determine a current plant condition based at least partially on a previously executed plan, at least one corresponding observation from the plant, and the plant model, and to determine expected information gain data representing diagnostic value for one or more possible plans or partial plans based on the current plant condition and the model;
wherein the planner is operative to construct or select at least one production plan for the plant that concurrently achieves at least one production goal and at least one diagnostic objective relating to identifying resources causing intermittent or persistent faults based at least partially on the current plant condition, the plant model, and the expected information gain data from the diagnosis engine.
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Abstract
Model-based production control systems and methods are presented for constructing plans for controlling operation of a production system with a plant having a plurality of resources to achieve one or more production goals, in which a planner constructs plans for execution in the plant based on production goals while balancing both production objectives (e.g., production cost, production time) and diagnostic objectives (e.g., diagnostic cost, information gained, repair cost), and a diagnosis engine determines a current plant condition based on a previously executed plan and corresponding observations from the plant, and provides expected information gain data to the planner, with the planner generating a plan that will achieve a given production goal and is improved for one or more diagnostic objectives and the expected information gain data.
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Citations
19 Claims
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1. A production control system for controlling operation of a production system with a plant that can achieve one or more production goals, the control system comprising:
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a planner operatively coupled with the production system to provide one or more plans for execution in the plant based on at least one production goal; a plant model operatively coupled with the planner and including a model of the plant; and a diagnosis engine operatively coupled with the planner, the production system, and the model, the diagnosis engine operative to determine a current plant condition based at least partially on a previously executed plan, at least one corresponding observation from the plant, and the plant model, and to determine expected information gain data representing diagnostic value for one or more possible plans or partial plans based on the current plant condition and the model; wherein the planner is operative to construct or select at least one production plan for the plant that concurrently achieves at least one production goal and at least one diagnostic objective relating to identifying resources causing intermittent or persistent faults based at least partially on the current plant condition, the plant model, and the expected information gain data from the diagnosis engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of generating plans for execution in a production system with a plant to achieve one or more production goals, the method comprising:
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determining a current plant condition based at least partially on a previously executed plan, at least one corresponding observation from the plant, and a plant model; determining expected information gain data representing diagnostic value for a plurality of possible plans or partial plans based on the current plant condition and the model; and using a processor, constructing or selecting a production plan that will concurrently achieve a given production goal and a diagnostic objective relating to identifying resources causing intermittent or persistent faults based at least partially on the current plant condition and the expected information gain data. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable medium having computer executable instructions for performing the steps of:
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determining a current plant condition in a production system plant based at least partially on a previously executed plan, at least one corresponding observation from the plant, and a plant model; determining expected information gain data representing diagnostic value for a plurality of possible plans or partial plans based on the current plant condition and the model; and constructing or selecting a production plan that will concurrently achieve a given production goal and a diagnostic objective relating to identifying resources causing intermittent or persistent faults based at least partially on the current plant condition and the expected information gain data.
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Specification