Process control system

Details Process control system Process control system

1979-01-09

1981-06-23

Ruggiero, Joseph F.

Boots, shoes, and leggings

318561, 318610, 364103, 364105, G05B 1116, G06F 1546

Patent

active

042754399

ABSTRACT:
There is provided a process control system having a deviation circuit for calculating a deviation of the process variable representing a state of a process to be controlled from the set-point value. And there is provided a process control system further including a differential circuit for differentiating a deviation, a controller for estimating a trend of a process on the basis of the two pieces of information and determining a proper controlling amount of the process variable in accordance with the process trend estimated.

REFERENCES:
patent: 2866108 (1958-12-01), Olsen et al.
patent: 3422418 (1969-01-01), Simoneau
patent: 3882368 (1975-05-01), Carleton
patent: 3947665 (1976-03-01), Hundley
patent: 3987351 (1976-10-01), Appelberg et al.
patent: 4064394 (1977-12-01), Allen

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