| 摘要 |
<p>PURPOSE:To improve the stability, control performance and quick responsiveness of a system by collating the detected opening amount with the value obtained by applying a prescribed proportional/integral operation to the 1st deviation amount to obtain the 2nd deviation amount and using this 2nd deviation amount to a control command of an opening minor loop. CONSTITUTION:A proportional element 28 applies a prescribed proportional operation to the deviation output between the detected water level and the target water level given from a collation circuit 26. At the same time, a prescribed differential operation is applied to said deviation output by a differential element 32. In addition, a prescribed proportional/integral operation is applied to the output of a collation circuit 30 which uses said operations as a deviation input. The output of the element 34 and the detected opening given from an opening detecting circuit 22 are supplied to a collation circuit 36. Then the output of the circuit 36 is applied as a control command of an opening control system formed to a primary delay system by forming 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 water in a water tank 20 is kept at a fixed level.</p> |
