| 摘要 |
PURPOSE:To prevent the unstable control for the output pressure of a pump which is due to a delay of response for the control of the pump rotational frequency, by adding the signal obtained by applying a dampling feedback operation to the pump output signal or the actual flow signal. CONSTITUTION:The deviation is obtained through a comparator 9 between the flow rate command signal and the actual flow rate to be used as the pump output pressure command signal (a) through a proportional integrating controller. While the pump output pressure signal (b) is added 11 with the signal (c) obtained by applying a damping feedback operation to the signal (b) through a damping feedback operator 12 to obtain the compensating signal (d). The signal (d) is compared with the signal (a) through a comparator 13, an this deviation receives a proportional operation to obtain the control signal (e) to be applied to the joint of the pump fluid. The same effect is ensured by applying the damping feedback operation to the acutal flow rate signal and then adding the flow rate signal to the fluid joint signal. |
