| 摘要 |
PURPOSE:To attain always optimum feedforward by multiplying an external disturbance compensating coefficient of feedforward control with a regulating output signal of a feedback control system so as to attain automatically optimum correction. CONSTITUTION:When the external disturbance compensating coefficient K is deviated from an optimum value because of the state change of a process, there is a difference between the set value and a controlled variable, this difference is inputted to a regulating section 12 and a regulating signal so as to zero the difference between the set value V and the controlled variable X is produced from the regulating section 12. A regulating signal is multiplied with the feedforward component signal at the multiplication section 17 and the result is given as an oprating signal. Finally, the difference between the set value and the controlled variable is converged to zero. As being clear from the above, the product between the external disturbance compensating coefficient K and the regulating signal forms an optimum coefficient of the feedforward control system because of the state change in the process, and the external disturbance compensating coefficient K is automatically apparently corrected to the optimum value. |
