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The Research on Speed Control System of PTFE Extruder

Author: LiFeng
Tutor: ZhuXiuZuo；DuHongJie
School: Tianjin University
Course: Electronics and Communication Engineering
Keywords: Push Tow Piston Speed ??control
CLC: TP273
Type: Master's thesis
Year: 2004
Downloads: 39
Quote: 0
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Abstract


PTFE (polytetrafluoroethylene, abbreviated as PTFE) is a high temperature , corrosion-resistant , has excellent insulating properties and mechanical and physical properties of plastic , wire and cable manufacturing PTFE material in the metallurgical, chemical, medical, automotive , communications , etc. areas with a wide range of applications ; particular, occupies an important position in the aerospace , military and other fields of application . Traditional PTFE pushing equipment and foreign hydraulic power to push equipment , whether there is a wide gap in the control accuracy or processing capacity . The the PTFE pushing equipment used by domestic enterprises are basically a threaded drive piston thrust, this equipment can not produce high precision , PTFE wire length . To this end , this article on the use of hydraulic power technology and intelligent speed control technology designed PTFE pushing the devices discussed , focusing on a key part of the PTFE hydraulic pushing machine - the towing speed control system and piston speed control system design . Using MATLAB to calculate and draw the graph in the design process . System open-loop transfer function to draw the Bode diagram Bode plot to come to the open-loop system gain margin and phase margin , and so to determine whether the system is stable enough , and need to be corrected ; system closed-loop transfer the unit step response function to draw the system unit impulse response , unit ramp response curves to determine the system's transient response characteristics to meet the requirements . In the design process , the use of the PID controller to correct the piston velocity control system, in order to achieve stability of the system . Elaborated and intelligent control system IPC control procedures in the text of the intelligent speed control system , A / D, D / A conversion circuit and a comparator control circuit . Finally, the problems found in the commissioning of new equipment and the corresponding countermeasures are also briefly discussed . After the PTFE pushing equipment debug improved to meet the requirements of actual production has been put into normal production , to meet the design requirements .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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