Research On The Control Technology Of Digital Hydraulic Cylinde’s Micro Feed

With the development of science and technology. Modern industrial productionequipments have more requirements on the accuracy and stability of control, so digitaltechnology also widely popularized. With the digital technology using in the hydrauliccontrol field, the digital cylinder have developed rapidly. The digital cylinder usuallyuse Ball screw to drive the valve core for the accurate position control. Using thedisplacement sensor precision feedback the hydraulic cylinder position. By changingthe pulse frequency and pulse number to change the movement speed anddisplacement of the hydraulic cylinder. To Realize high precision position control andspeed control. So it becomes more popular in modern industrial production equipment.By analyzing the structure and working principle of digital hydraulic cylinder inhome and abroad, after looking a large number of reference literatures. In this passagewe put forward a digital valve based on the theory of the slit. By means of digital valveof micro flow control to realize the digital cylinder feed control. Under the control ofPLC programme, the stepper motor receive digital pulse signal to drive moble digitalvalve. By changing the digital gap length of the valve core to control the flow. So as torealize the motion control of the hydraulic cylinder. In the whole system, adopts thephotoelectric encoder to control the digital valve core displacement ccuracy,mechanical structure for the closed-loop control,By flow sensor to test the hydrauliccylinder input flow rate. PLC according to the feedback information real-timeadjustment of digital valve control hydraulic cylinder valve core displacement inputflow. So as to realize the closed-loop control of the whole system, improved theprecision of digital hydraulic cylinder micro feed control.Papers aimed at this kind of new digital hydraulic cylinder, established themathematical model of the digital hydraulic cylinder system at first, and by usinghydraulic simulation software AMESIM simulation analysis to the entire hydraulic system.Second, constructed the flow chart of the control of the whole system, usedPLC as the controller of digital hydraulic system, and use Kinco HMIwareconfiguration software editing to form the whole of the automatic control system ofthe man-machine interface.Finally, the digital hydraulic cylinder micro feed controlsystem has carried on the experiment test, and analyzes the experimental results. Theresearch achievements of this paper is for the future of digital hydraulic cylinder andits control system research provides a reference basis.