| 摘要 |
PURPOSE:To improve both the accuracy of controlling the number of revolutions and the starting characteristics of an apparatus by setting two kinds of control gain at the time of a closed loop control and by selecting a high gain out of the two control gains for specified period of time after transition to said closed loop control. CONSTITUTION:A controller for servomotor 14 as a target of control is constituted by a servo amplifier 7, a power amplifier 8, a digital control circuit, etc., the servo amplifier 7 is equipped with a one-shot circuit 10 and an AND gate 11 to make and break a switch circuit S by the output of the gate 11 and to lower the gain of an amplifier 12 on breaking and to raise the gain on making. As a result, a closed loop control is conducted for a specified period of time by a high gain before transition to a servo control in the region of the target number of revolutions. |
