Based On Fuzzy Self-tuning Pid Algorithm Precision Forging Machine Chuck Control Research

The development of precision forging machine has important scientific andeconomic significance. As GFM’s proprietary technology, horizontal forgingmachine is expensive, but for it is the optimal solution for cold forging axis, thedemand for the precision forging machine of some domestic forging factories isvery large. Although we still have a long way to complete a precision forgingmachine with independent intellectual property right, step back and speaking,the study of precision forging machine can make us use the existing importequipment better so as to save a lot of costs for maintenance.The present of our Chuck is one of the main auxiliary equipment of theprecision forging machine, which has a very important role in the forgingprocess, it’s function is holding the blank, rotation and axial feed follow-up theservo motion.The content of this thesis is the rotation of the head movement. Inprinciple analysis, the rotation of the chuck body is in essence a kind ofelectro-hydraulic servo position control system.As a main branch in the field of hydraulic, metal forming has been takenseriously to use in the area such as military, aerospace recent years.Electro-hydraulic position servo system is a typical nonlinear control system. Inpractical application，system parameter changes due to environmental factors,which affects the control quality. The question is how to make control algorithmmore intelligent so that it can adapt to the outside world transformation to alterthe control strategy to make a deal with it, which is the focus of our researchproject. The implement of the traditional PID controller is easier, but fornonlinear control object, it often can not meet the precision of the requirementsof the precision and speed. Fuzzy control theory makes we have a newsolution of complex nonlinear systems, it is a branch of intelligent controltheory, we can use the practical experience from the practice to establish expertcontrol rules, which in response to the external environment change caused bysystem features setting problem, but the precision of the of fuzzy control is nothigh,which restricts its development to a great extent. This paper adopts the fuzzy self-tuning PID control algorithm that combines both advantages, so it canachieve a good control effect.AMESim is a excellent hydraulic modeling software, we can build acomplete hydraulic system modeling with it, it has the Simulink interfacetechnology, which make us to use the powerful operation ability of the hydraulicsystem, the simulation effect is more accurate than that in Simulink simulation,we have to simplify the approximate processing according to the control objectin Simulink, transfer function is obtained as a controlled object of the simulationsystem, the virtually increases the error of the system simulation; AMESimgenerate the control object directly in the corresponding input the relatedparameters in hydraulic model, which complete description of the hydraulicsystem more accurate.The simulation result shows that the fuzzy self-tuning PID controller is agood way to control the chuck system of the precision forging machine. It cansatisfy the high frequency of chuck rotation.