Method and system for acquiring parameters in process control

Details Method and system for acquiring parameters in process control Method and system for acquiring parameters in process control

1990-01-12

1991-10-15

Smith, Jerry

Boots, shoes, and leggings

364165, 364150, G05B 1304

Patent

active

050579932

ABSTRACT:
In a process control system prior to execution of process control, a manipulated variable to which an identification signal from an identification signal generator is added is inputted to a process. In a preadaptation section, a controlled variable output from the process is sampled to obtain its dead time and maxmum gradient, and the initial values of PID control parameters are calculated on the basis of the dead time and the maximum gradient. The initial values of PID control parameters and the like are set in the adaptation section. In the adaptation section, a pulse transfer function of the process is acquired, and PID control parameters are calculated from the acquired pulse transfer function by using a partial matching method in a frequency region. After these PID control parameters are set in a control section, process control is executed.

REFERENCES:
patent: 3798426 (1974-03-01), Bristol, II
patent: 4607326 (1986-08-01), Mori et al.
patent: 4674029 (1987-06-01), Maudal
patent: 4881160 (1989-01-01), Sakai et al.
patent: 4983898 (1991-01-01), Kanda

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