| 摘要 |
PURPOSE:To enable control of a load with high accuracy without less delay in time by constituting a servocontrol mechanism by using a simple type servocontrol valve and eliminating the neutral zone thereof. CONSTITUTION:The error DELTA of the detected value M from a detector 2 with respect to a control target value F is corrected to the value DELTA' as expressed by the equation by the value C corresponding the neutral zone of a simple type servocontrol valve 3 and is used as an electric input signal to the valve 3. The flow rate Q of the pressure oil in the valve 3 is therefore corrected with respect to the error DELTA. If, for example, the error is assumed to be the value DELTA1 within the neutral zone, the DELTA1 is corrected to DELTA1+C=DELTA'1 even if the flow rate is 0, on account of the characteristic inherent to the valve 3. The pressure oil is supplied at the corrected flow to generate the flow rate Q1. The valve 3 is thus rejected substantially of its neutral zone by a control part 4. |
