Method and device for control over an admissable range with contextual anticipation using fuzzy logic
US5831850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1995 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Jul 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S706/906
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
For controlling physical quantities in industrial plants, and particularly in the crude oil processing industries, the chemical and papermaking industries and gas, power stations and distribution networks, the value of a controlled physical quantity, subjected to perturbations, is kept between two limit values by modifying an action quantity. The action quantity should have small amplitudes in order to stabilize the downstream flows and should evolve so as to anticipate the perturbations. It is determined by performing fuzzy inference on a set of predefined decision rules, on the basis of values of the controlled physical quantity, of a secondary variable connected with the controlled physical quantity and of a context variable obtained from at least one detection variable or from a combination of detection variables representative of the physical quantities at the origin of the perturbations in the controlled physical quantity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.