Research on Electromechanical Coupling of Three-Ring PSO-PID Setting Control for CNC Forging Machine Servo System
The control performance of the feed servo system of CNC forging press is affected by the force,heat and wear of electro-mechanical system,and dynamic errors will be produced in the machining process.In order to comprehensively analyze the dy-namic error variation of CNCforging press feed servo system,a precision three-loop control system is designed,and the electrome-chanical coupling model of mechanical transmission is established and simulated.Considering the actual operating conditions of the feed servo system,the dynamic error of the system is analyzed.The results show that a larger inertia ratio servo system is formed when the load is increased,and the system obtains a larger overshoot,resulting in an increase in response time.The posi-tion deviation of the feed servo system is 5.5mm,and the optimal positioning accuracy is obtained at the inertia ratio of 4.15.Compared with PID control,PSO-PID method can reduce the error and obtain the most obvious effect.The research is helpful to improve the position control accuracy of CNC forging press feed servo system and lay a theoretical foundation for the subsequent machining quality optimization.
Feed SystemThree Loop ControlMoment of Inertia RatioPositioning Accuracy
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