| 摘要 |
PURPOSE:To attain the automatic and optimum control of valve opening amount to a state change by detecting the prescribed characteristic parameter for a valve, a fluid pipeline, etc. and then calculating variably the optimum gain of a control system based on said characteristic parameter. CONSTITUTION:The water supply pressure P2 detected by a water supply pressure detector 5 set at a water pipeline 15 is compared with the set voltage P20 by a comparator 17. Thus a pressure deviation P2 is obtained and supplied to a control meter 11 together with a valve opening amount Z given from a valve opening amount detector 1. Then a valve opening amount of operating quantity DELTAZ. While the flow rate Q detected by a flow rate meter 3 is supplied to an operator 7 together with the amount Z. Thus the correction gain G' is obtained to the quantity DELTAZ and multiplied by the quantity DELTAZ by a multiplier 9. Thus a corrected operating quantity DELTAZ' is obtained. Then a valve operating motor is driven for control of the valve opening amount. |
