| 摘要 |
PURPOSE:To perform a quick-response and stable control, by adding an addition control output, which includes the feedback term of process variables, the correcting term of a porportional integral and differential PID output, and the compensating term of a loss time, to the PID control output. CONSTITUTION:The difference between a process constant value and a preliminarily set target value is taken out from a process 2 through a detecting terminal 3 at every interval of a certain sampling time T and is stored as an electric signal (x) in a storage device 4. The signal (x) is given to a PID controller 5. The PID control output is stored in a storage device 6 by this deviation. The addition control output which includes the feedback term of (x) and DELTAx of process variables, the correcting term of DELTAu1 for the PID output value, and a loss time compensating term of DELTAu2 of the process and accords to expression 1 is added to the PID control output. |
