JPS6435601A - Automatic controller - Google Patents

Abstract

PURPOSE:To obtain an automatic controller which does not spoil the stability which the whole control system has, while securing a satisfactory control performance, by using a precedent auxiliary signal for correcting the process quantity, for a control,, and correcting precedently an operation delay portion. CONSTITUTION:By inputting an operation command signal, an ideal process quantity is calculated by a first operating position - process quantity calculating means 1, and by inputting an actual operating position, an actual process quantity is calculated by a second operating position - process quantity calculating means. Both these process quantities are inputted to the first adding means 4, and when a discrepancy exists, the process quantity to be corrected is outputted, adjusted by a correction function generating means 5, and thereafter, added to a process quantity signal outputted from a process quantity detector as a precedent auxiliary signal, by the second adding means 6, and inputted to an adding means for deriving a deviation to a process quantity target value as a feedback signal A deviation signal from the adding means is inputted to a proportional-plus-integral control means and an operation command signal is outputted, and an apparatus to be operated is controlled. In such a way, in case when a response delay exists in the apparatus, a precedent control is executed.