| 摘要 |
PURPOSE:To stably control the pressure of a static oil hydraulic pressure driving gear and its speed, by performing positive feedback control of a speed signal of an oil hydraulic actuator to promote a stable control objective thereafter performing a feedback control of the pressure and the speed. CONSTITUTION:A function generator 14, inputting by controlling a control lever 6 a deviation DELTAomega between a speed command signal omegas of an oil hydraulic actuator and its actual speed signal omegam, outputs a difference pressure preset value Ps. A control arithmetic device 16, inputting a deviation DELTAP of said difference pressure preset value Ps from a difference pressure P of the oil hydraulic actuator, outputs a pressure control signal epsilonp. While the device 16 outputs a signal epsilonm applying a feedback gain 17 to the actual speed signal omegam. And the control arithmetic device 16 outputs a signal, performing a positive feedback control of the signal epsilonm to add it to the pressure control signal epsilonp, so as to control a swash plate driving servo system 11A of an oil hydraulic pump. |
