Research On Tension Control Of Winding System Of Operation Control Platform Based On Variable Universe Fuzzy PID

Winding system is a kind of complex multi-input multi-output dynamic system,which has the characteristics of time-varying,nonlinear and strong coupling,and widely exists in papermaking,printing,textile,steel and other manufacturing industries.Among many winding equipment,the stability of system tension is the main factor affecting the quality of finished product processing.Traditional PID control can reduce the influence of roll diameter change on tension to a certain extent when the parameters are appropriate,but when the target line speed changes,the current parameters will not be applicable,which seriously reduces the stability of tension.In order to improve the control performance of the winding tension control system,this paper takes the typical winding system built on the advanced motion control comprehensive training platform as the research object,based on the Siemens S7-1500 PLC and S120 server,designed a variable universe fuzzy PID(VUFPID)algorithm of winding tension control system and carried out simulation and experiment.A general introduction was given to the typical winding system structure and hardware built,and control objectives were proposed to verify the stability of line speed,tension,and overall stability.Analyzed the mechanism of coil tension formation,established a dynamic model of the winding end and mathematical models of other parts of the system.Based on the understanding of the winding system model,a tension fully closed loop control scheme was designed under the half closed loop of linear speed;Based on the analysis of the internal stress of the winding coil under constant tension control,a tension taper control function was designed.The design steps of the fuzzy controller and the idea of variable universe fuzzy control were introduced in sequence,and the input output scaling factor suitable for the winding system was designed.Using the established mathematical model,simulation experiments on PID,fuzzy controller optimization PID(FPID),and variable universe fuzzy controller optimization PID were conducted in Simulink.After comparing the simulation results,it can be concluded that the VUFPID controller not only performs better in tension control than other controllers at the same line speed,but also significantly improves the problem of PID parameter inapplicability under different line speed settings.In order to verify the effect of VUFPID controller in a typical winding system,software configuration,PLC program design and HMI monitoring screen design were carried out on TIA V17 software.In addition to using motion control instructions and other necessary program structures to realize the basic tension control scheme,the VUFC controller is programmed with the SCL language,and the variable universe fuzzy PID control function is realized with the "PID＿Compact" instruction.Finally,the effects of line speed control,constant tension/tension taper control and fixed-length winding were tested on the control platform.The experimental results show that the VUFPID-based winding tension control system line speed fluctuation amplitude meets the control target,the tension amplitude is significantly smaller than the PID control,the tension taper curve tracking effect is better,and the fixed-length winding accuracy is better than the target value.To sum up,it can be concluded that the real-time tuning of PID parameters by using the variable domain fuzzy controller proposed in this paper can alleviate the phenomenon that the winding tension under the pure PID control is aggravated by the change of the given line speed due to the change of the given line speed.Practical reference value.