Method and system for acquiring parameters in process control.

摘要

In a process control system prior to execution of process control, a manipulated variable to which an identification signal from an identification signal generator (13) is added is input to a process (12). In a preadaptation section (19), a controlled variable output from the process (12) is sampled to obtain its dead time and maximum 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 (17). In the adaptation section (17), a pulse transfer function of the process (12) 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 (11), process control is executed.