Self-tuning process controller

Details Self-tuning process controller Self-tuning process controller

1987-10-19

1989-03-21

MacDonald, Allen

Boots, shoes, and leggings

364177, G05B 1300

Patent

active

048149683

ABSTRACT:
An industrial process control system in which an electronic controller acts in a controlled process subject to process "dead time" to maintain a process variable at a desired value. Applied as inputs to the controller are signals representing the process variable and a set point, the controller yielding an output signal that reflects the deviation of the process variable from the set point and acts to adjust a final control element in the system to cause the process variable to conform to the set point. To effect self-tuning of the controller, a microprocessor is provided which is responsive to the process variable signal and the output signal from the controller and functions while the controller is operating to identify in a discrete-time process model parameter-identifier the process dead time and the process parameters, and to compute tuned controller parameters, and to transfer the calculated controller parameters to the controller so that the controller can be tuned to prevailing process conditions.

REFERENCES:
patent: 4054780 (1977-10-01), Bartley et al.
patent: 4448736 (1984-05-01), Emery et al.
patent: 4451878 (1984-05-01), Shigemasa
patent: 4639853 (1987-01-01), Rake et al.
patent: 4758943 (1988-07-01), Astrom et al.

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