Adaptive process modelling and control

• US 5,890,146 A
• Filed: 04/29/1997
• Issued: 03/30/1999
• Est. Priority Date: 05/02/1996
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Wavish, Peter R., Connah, David M.
• Primary Examiner(s): Downs, Robert W.
• Assistant Examiner(s): Shah, Sanjiv
• Application Number:
  US08/840,359
• Time in Patent Office: 700 Days
• Field of Search: 706/46, 706/47, 706/48, 706/49
• US Class Current: 706/46
• CPC Class Codes: G06F 8/20 Software design
• CPC Class Codes: G06N 5/043 Distributed expert systems; Blackboards

Abstract

A rule-based data processing system includes a memory having stored therein a number of groups of agents. Each group is defined by respective sets of rules, with the system running the respective sets of rules in parallel. The agents are in two clusters: "script agents" which are arranged as a sequentially enabled chain and "operator agents" arranged to carry out selected procedural steps. The selection of the procedural step is made within each operator agent based on of one or more external factors, and is triggered by enablement of a script agent of the sequence prior to that script agent carrying a marker identifying an operator agent.

Claims

1. A rule-based data processing apparatus comprising:

a processor; and

a memory coupled to said processor and configured to store a first group of agents and at least one further group of agents, with each of said first group of agents and said at least one further group of agents being defined by respective sets of rules, wherein

said processor is configured to run said respective sets of rules in parallel,

said agents of the first group are configured as script agents and are enabled in sequence,

said at least one further group of agents is configured as operator agents that each carry out a selected one of a plurality of procedural steps, with selection of the procedural step being made within the operator agent on the basis of one or more factors that are external to said operator agent,

each one of said script agents is configured to carry a marker for cueing at least one of said operator agents to perform said selected one of the plurality of procedural steps, and

said operator agents are configured to perform the selection of said one of the plurality of procedural steps prior to cueing by said script agent.

2. Apparatus as claimed in claim 1, comprising two or more operator agents wherein at least one of said external factors, on the basis of which one of the operator agents makes said selection, is a current setting of a controllably variable value set by another of the operator agents.

3. Apparatus as claimed in claim 1, wherein each of said script agents is configured to identify when the operator agent or each operator agent for which it carries a marker has made said selection following triggering by enablement of a preceding script agent, and to modify an internal behaviour value on making said identification.

4. Apparatus as claimed in claim 3, wherein each of said script agents is configured to unload itself from said memory means following enablement and said modification of said internal behaviour value.

5. Apparatus as claimed in claim 1, wherein one or more of said script agents includes an internal mechanism operable to generate a first representation of factors external to said script agent and referred to by functions supported by said script agent, to generate a second representation of said functions supported by said script agent, to compare said first and second representations, and to generate and output an indication of any inconsistency between said first and second representations.

6. The apparatus of claim 1:

wherein said script agent is a first script agent;

wherein said operator agent is further configured to perform the selection of said one of the plurality of procedural steps subsequent to enablement of a second script agent of the sequence; and

wherein said second script agent precedes said first script agent in the sequence.

7. A process control apparatus comprising:

a rule-based data processor;

an interface coupled with said processor; and

a memory coupled to said processor and configured to store a first group of agents and at least one further group of agents, with each of said first group of agents and said at least one further group of agents being defined by respective sets of rules, wherein

said processor is configured to run said respective sets of rules in parallel,

said agents of the first group are configured as script agents and enabled in sequence,

said at least one further group of agents are configured as operator agents that each carry out a selected one of a plurality of procedural steps, with selection of the procedural step being made within the operator agent on the basis of one or more factors that are external to said operator agent,

each one of said script agents is configured to carry a marker for cueing at least one of said operator agents to perform said selected one of the plurality of procedural steps,

said operator agents are configured to perform the selection of said one of the plurality of procedural steps prior to cueing by said script agent, and

said interface is configured to control a plurality of external processes linked thereto on triggering of respective operator agents.

8. Apparatus as claimed in claim 7, comprising two or more operator agents wherein at least one of said external factors, on the basis of which one of the operator agents makes said selection, is the current setting of a controllably variable value set by another of the operator agents.

9. Apparatus as claimed in claim 7, wherein each of said script agents is configured to identify when the operator agent or each operator agent for which it carries a marker has made said selection following triggering by the enablement of a preceding script agent, and to modify an internal behaviour value on making said identification.

10. Apparatus as claimed in claim 9, wherein each of said script agents is configured to unload itself from said memory means following enablement and said modification of said internal behaviour value.

11. Apparatus as claimed in claim 7, wherein one or more of said script agents includes an internal mechanism operable to generate a first representation of factors external to said script agent and referred to by functions supported by said script agent, to generate a second representation of said functions supported by said script agent, to compare said first and second representations, and to generate and output an indication of any inconsistency between said first and second representations.

12. An interactive entertainment apparatus comprising:

a rule-based data processor;

an output device coupled to said processor; and

a memory coupled to said processor and configured to store a first group of agents and at least one further group of agents, with each of said first group of agents and said at least one further group of agents being defined by respective sets of rules, wherein

said processor is configured to run said respective sets of rules in parallel,

said agents of the first group are configured as script agents and enabled in sequence,

said at least one further group of agents are configured as operator agents that each perform a selected one of a plurality of procedural steps, with selection of the procedural step being made within the operator agent on the basis of one or more factors that are external to said operator agent,

each one of said script agents is configured to carry a marker for cueing at least one of said operator agents to perform said selected one of the plurality of procedural steps,

said operator agents are configured to perform the selection of said one of the plurality of procedural steps prior to cueing by said script agent, and

said output device is configured to generate an indication of the selected one of the plurality of procedural steps for each of said operator agents.

13. Apparatus as claimed in claim 12, comprising two or more operator agents wherein at least one of said external factors, on the basis of which one of the operator agents makes said selection, is a current setting of a controllably variable value set by another of the operator agents.

14. Apparatus as claimed in claim 12, wherein each of said script agents is configured to identify when the operator agent or each operator agent for which said script agent carries a marker has made said selection following triggering by enablement of a preceding script agent, and to modify an internal behaviour value on making said identification.

15. Apparatus as claimed in claim 14, wherein each of said script agents is configured to unload itself from said memory means following enablement and said modification of said internal behaviour value.

16. Apparatus as claimed in claim 12, wherein one or more of said script agents includes an internal mechanism operable to generate a first representation of factors external to said script agent and referred to by functions supported by said script agent, to generate a second representation of said functions supported by said script agent, to compare said first and second representations, and to generate and output an indication of any inconsistency between said first and second representations.

17. Apparatus as claimed in claim 12, wherein said output means comprises means operable to generate an image of a virtual environment and to animate one or more modeled features in said environment, the animation of the modelled features or each of said one or more modeled features being controlled by a respective operator agent.

18. Apparatus as claimed in claim 17, further comprising at least one further agent or group of agents, the further agent or each said further agent of the group of agents being triggered by actions initiated by one or any of said operator agents.