Method and apparatus for process control

Details Method and apparatus for process control Method and apparatus for process control

1980-12-12

1983-05-31

Ruggiero, Joseph F.

Boots, shoes, and leggings

364164, 364165, 364181, 318561, G05B 1100, G05B 1302

Patent

active

043863973

ABSTRACT:
A method and apparatus for process control of batch processes utilizing the steps of storing in a memory the actual measured values of the process variable and utilizing the memorized values for an estimative operation to determine the timing for supplying a manipulated variable to the process. Thus, the process control apparatus of the present invention commits to memory the actual measured values of the process variable, utilizes the memorized values for the estimative operation to determine the point of time for suspending the supply of the manipulated variable and the point of time for starting the regular constant value control and, based on the outcome of this estimative operation, effects the separation of the process control under the steady condition from the control under the transient condition. Such a control operation ensures that the control value is not increased beyond its limit and, at the same time, it permits the adjusting period to be reduced to the minimum.

REFERENCES:
patent: 3728526 (1973-04-01), Youngblood
patent: 3767900 (1973-10-01), Chao et al.
patent: 4069413 (1978-01-01), Rutledge et al.
patent: 4169283 (1979-09-01), Lewis
patent: 4250543 (1981-02-01), Smith et al.

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