Exception processor system

• US 5,247,447 A
• Filed: 10/31/1990
• Issued: 09/21/1993
• Est. Priority Date: 10/31/1990
• Status: Expired due to Term

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Korncoff, Alan, Ramachandran, Karapurath
• Primary Examiner(s): RUGGIERO, JOSEPH F
• Application Number:
  US07/609,180
• Time in Patent Office: 1,056 Days
• Field of Search: 364/468, 364/184-187, 364/550, 364/551.01, 364/551.02, 395/904, 395/905, 395/906, 395/912, 395/914, 395/50, 395/52, 395/68, 395/75
• US Class Current: 700/108
• CPC Class Codes: G05B 19/4184 characterised by fault tolerance, reliability of production system
• CPC Class Codes: G06F 11/2257 using expert systems
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
• CPC Class Codes: Y10S 706/912 Manufacturing or machine, e.g. agricultural machinery, machine tool

Abstract

An exception processing system for use in conjunction with manufacturing facilities, and automated manufacturing cells in particular is provided. The exception processor is adapted to receive alarms from a cell controller indicating that an unplanned event or exception has occurred in cell operation. The exception processor implements an automated recovery procedure that responds to the alarm, corrects the exception, and returns the cell to normal operation. The exception processor also statistically monitors cell operation in order to avoid exceptions before they occur, and to provide better control over cell processes.

Claims

1. For use in a manufacturing facility involving a plurality of preplanned steps and procedures for making parts, such steps and procedures being implemented by a plurality of individual work stations whose respective operations are coordinated by a cell controller, an exception processing system for correcting unplanned events during the operation of said facility, comprising:

a computer connected to said cell controller to send and receive information to and from the same, said computer being programmed to receive an alarm from said controller indicating an unplanned event in the operation of said automated manufacturing facility, and to acknowledge to said controller receipt of said alarm, and being further programmed to selectively request certain data from said controller concerning said alarm, and to receive such data;

a set of recovery procedures, each procedure providing a preplanned pattern of potential corrective actions for returning said manufacturing facility to normal operation after a given unplanned event, wherein said computer is further programmed to access and implement, by determining a cause of an unplanned event and implementing corrective actions, at least one of said recovery procedures in response to said cell controller alarm; and

a user interface connected to said computer, for enabling communications between said computer and a human operator, wherein said computer is still further programmed to prompt the input of certain information from said operator via said user interface, to assist said computer in implementing a recovery procedure.

3. The exception processing system of claim 1, wherein said computer is further programmed to log into memory any unplanned event in the operation of said manufacturing facility, and the corrective action taken to correct such unplanned event.

2. For use in a manufacturing facility involving a plurality of preplanned steps and procedures for making parts, such steps and procedures being implemented by a plurality of individual work stations whose respective operations are coordinated by a cell controller, an exception processing system for correcting unplanned events during the operation of said facility, comprising:

a computer connected to said cell controller to send and receive information to and from the same, said computer being programmed to receive an alarm from said controller indicating an unplanned event in the operation of said automated manufacturing facility, and to acknowledge to said controller receipt of said alarm, and being further programmed to selectively request certain data from said controller concerning said alarm, and to receive such data;

a set of recovery procedures, each procedure providing a preplanned pattern of potential corrective actions for returning said manufacturing facility to normal operation after a given unplanned event, wherein said computer is further programmed to access and implement at least one of said recovery procedures in response to said cell controller alarm;

a user interface connected to said computer, for enabling communications between said computer and a human operator, wherein said computer is still further programmed to prompt the input of certain information from said operator via said user interface, to assist said computer in implementing a recovery procedure; and

statistical process control of said manufacturing facility,

wherein said computer is further programmed to monitor said automated manufacturing facility by periodically requesting information from said cell controller concerning part-making steps and procedures under the cell controller'"'"'s control, said computer storing such information into a statistical knowledge base, for both monitoring operation of said facility and anticipating when a step and procedure in said facility is deviating from normal operation.

4. For use in a manufacturing facility involving a plurality of preplanned steps and procedures for making parts, such steps and procedures being implemented by a plurality of individual work stations whose respective operations are coordinated by a cell controller, an exception processing system having a combination of heuristic, deterministic and statistical procedures for monitoring operation of said facility, and forth both correcting unplanned events during the operation of said facility and anticipating when a step and procedure in said facility is deviating from normal operation, said exception processing system comprising:

a computer connected to said cell controller to send and receive information to and from the same, said computer being programmed to receive an alarm from said controller indicating an unplanned event in the operation of said automated manufacturing facility, and to acknowledge to said controller receipt of said alarm, and being further programmed to periodically request information from said cell controller concerning part-making steps and procedures under the cell controller'"'"'s control, said computer storing such information into a statistical knowledge base for monitoring operation of said facility;

a set of recovery procedures, each procedure providing a preplanned pattern of potential corrective actions to return said manufacturing facility to normal operation after a given unplanned event, wherein said computer is further programmed to access and implement at least one of said recovery procedures in response to said cell controller alarm; and

a user interface connected to said computer, for enabling communications between said computer and a human operator, wherein said computer is still further programmed to prompt the input of certain information from said operator via said user interface.

5. The exception processing system of claim 4, wherein said computer is programmed by an "object-oriented" program.

6. The exception processing system of claim 5, wherein said object-oriented program includes a communications interface object.

7. The exception processing system of claim 5, wherein said object-oriented program includes a protocol object.

8. The exception processing system of claim 5, wherein said object-oriented program includes a message object.

9. The exception processing system of claim 5, wherein said object-oriented program includes an operator screen object.

10. The exception processing system of claim 5, wherein said object-oriented program includes a recovery log object.

11. The exception processing system of claim 5, wherein said object-oriented program includes an exception processor handler object.

12. The exception processing system of claim 5, wherein said object-oriented program includes a statistical processing object.

13. The exception processing system of claim 6, wherein said communications interface object includes means for formulating and transmitting information in terms of TCP/IP interface protocols.

14. The exception processing system of claim 6, wherein said communications interface object includes means for formulating and transmitting information in terms of Ethernet interface protocols.

15. The exception processing system of claim 5, wherein said manufacturing facility is an automated manufacturing facility having sensors operable to monitor the steps and procedures of said facility, and wherein said computer is connected directly to said sensors, for receiving periodic data updates from them.