Multiple model supervisor control system and method of operation
US5659467A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1996 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Jun 26, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A multiple model supervisor control system (24) for use in a manufacturing environment (10) including a plurality of model based statistical process control units (14.sub.1 -14.sub.N) associated with equipment (#1-#N) is provided. The multiple model supervisor control system (24) includes a database (16) storing model coefficient shift data representing statistically significant drifts in output measurables that are associated with the model based statistical process control units (14.sub.1 -14.sub.N). A supervisor control unit (26) is coupled to the database (16) and is operable to access the coefficient shift data stored in the database (16). A multiple model map (30) of coefficient shift history is generated by the supervisor control unit (26) and shows the coefficient shift data against a common domain. A user interface (28) is coupled to the supervisor control unit (26) to provide user access to the multiple model map (30) to allow identification of problems caused by equipment drift and problems caused by environmental change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.