Feedback control apparatus and method

Details Feedback control apparatus and method Feedback control apparatus and method

Filed on

1991-10-11

Date issued

1993-09-21

Examiner

Smith, Jerry

Patent Class

Boots, shoes, and leggings

Other Related Categories

364148, 364160, 395900, G05B 1302

Type

Patent

Status

active

Patent number

052474321

Description

ABSTRACT:
In a control method for use in a feedback control apparatus having at least one of a proportional component, an integral component, a differential component and a combination thereof for outputting, in response to a deviation between a given target value and a controlled variable detected in a control object, a first manipulated variable to be supplied to the control object. A check is made to decide whether or not the controlled variable attained from the control object is within a settling range established with the target value set as a center thereof. When the controlled variable is judged to be beyond the settling range, a fuzzy reasoning is achieved in response to the given deviation according to predetermined reasoning rules to produce a second manipulated variable. The second manipulated variable is added to the first manipulated variable to obtain a third manipulated variable, which is then supplied to the control object. When the controlled variable is judged to be within the settling range, the first manipulated variable is supplied to the control object.

REFERENCES:
patent: 5129475 (1992-07-01), Kawano et al.
Patent Abstracts of Japan, vol. 14, No. 148 (P-1024) Mar. 20, 1990 & JP-A-20 08 903.
Patent Abstracts of Japan, vol. 14, No. 1148 (CP-697) Mar. 6, 1990 & JP-A-13 1 619.
Patent Abstracts of Japan, vol. 13, No. 586 (P-982) Dec. 25, 1989 & JP-A-12 50 103.
Patent Abstracts of Japan, vol. 13, No. 57 (P-825) Feb. 9, 1989 & JP-A-63 247 801.
Proceedings of the IEE Internat'l Conf. on Control and Appln., Apr. 1989, Jerusalem, Ill., pp. 1-5 G. W. Neat, et al.

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