| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for controlling pressure and flow rate, which can also control pressure and position. SOLUTION: In a bi-directionally variable discharge amount control, a pressure instruction 22, a pressure feedback signal 26, a flow rate instruction 31, and a flow rate feedback signal 33 are classified by directions into a plus and a minus to electrically identify a directional character, pressure deviation quantity 35 in which an instruction and a feedback signal are compared and compensated is compared with a flow rate deviation quantity 36, a deviation quantity 37 is selected, when the pressure deviation quantity is selected, a pressure feedback control is performed, and when the flow rate deviation quantity is selected, a flow rate feedback control is performed. The choice includes the deviation quantity of zero, depending on the plus or minus of the pressure instruction and a velocity instruction, the pressure deviation quantity, the flow rate deviation quantity. Further, a position feedback signal 47 is taken out of a linear scale 41 or the like, and a pressure and flow rate feedback control or a presser and position feedback control is selectively performed. COPYRIGHT: (C)2003,JPO
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