| 摘要 |
PURPOSE:To raise responsiveness and a suppressing property against a disturbance by injecting an identifying signal to a control system in the course of controlling a closed loop, identifying a dynamic characteristic of a process, and executing an auto-tuning to the control system having a response shape conforming to specifications. CONSTITUTION:In a process 1 in which a temperature, etc. of a chemical plant are controlled, a deviation between a sampled output y(t) and an output h(k) of a target value filter 4 is calculated by an operational amplifier 6, and this deviation e(k) executes a control through a deviation filter 7 and a PID operating part 8 so that the output signal y(t) of the process is made to coincide with a target value signal r(k) through a sample holding part 2. A pulse transfer function is identified by inputting an output u(k) of an adding part 10 and a sampled output y(k) to a pulse transfer function identifying part 11, and a control constant is obtained through an S transfer function operating part 12 and a control constant operating part 13 by its coefficient, a sample period tau, a response shape coefficient alpha of a control system, etc. In this regard, they are controlled by a deciding part 14 for ending of identification. |
