| 摘要 |
<p>PURPOSE:To secure the stability and control performance of a system and to perform the constant water level control by collating the detected value of opening amount with the value obtained by applying the prescribed proportional/integral operation to a control command of a water level major loop to obtain a deviation amount and using this deviation amount to a control command of an opening minor loop. CONSTITUTION:A prescribed proportional/integral operation is applied to the deviation output between the detected water level and the target water level given from a collation circuit 10 via a proportional/integral element 26. The output of the element 26 is supplied to a collation circuit 28 together with the detected value of opening given from an opening detecting circuit 22. Thus the output of the circuit 28 is obtained as a control command of an opening control system formed to a primary delay system by providing an opening minor loop lm. Then the output of a servo motor 16 is controlled in response to the own flow rate D(S). Thus the level of a water tank 20 is kept at a fixed amount.</p> |
