Method and device for control over an admissable range with cont

Details Method and device for control over an admissable range with cont Method and device for control over an admissable range with cont

1995-07-10

1998-11-03

Trammell, James P.

Boots, shoes, and leggings

364149, 364166, 364500, 364501, 3642219, 3642746, 395 3, 395 10, 395 11, 395 52, 395 61, 395900, 395903, 395906, G05B 1904, G06F 944

Patent

active

058318500

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.

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Article entitled "Fuzzy Averaging Level Control in Distillation Drums with Intelligent Mangement of Delayed Disturbances" presented at the European Refining Technology Conference held in London, on Jun. 25-27th, 1997.
Article presented at the Conference on the applications of Artificial Intelligence in the Petroleum Industry (AI PETRO) held in Sep. 1993 in Lillehammer, Norway, published by Editions Technip.

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