Gravure Printing Machine Tension - Speed Adaptive Decoupling Control

In the printing and packaging industry, the machine which made up of all kinds of winding construction are always employed. Tension control is an extremely important aspect in the control of winding system, the control effect will directly influence the quality of presswork: for example, while the winding tension fluctuates excessively, the presswork may show the phenomenon of loose or tight volume, what's worse, it may even be broken, the production can't continue as usual in result. So good tension control is an assurance to improve production efficiency and product quality, this paper will take the tension control system of gravure machine for the research, study the method how to improve the control effect of the system.As Gravure Tension Control System is a multi-input, strong coupling, time-varying system, features great dynamics model changing, strong tension-speed coupling, it is easy to cause the control system instable. Although traditional PID control method can achieve good control effect under certain control task, when the work speed of Gravure changed, it's easy to cause the tension of the paper fluctuates, then hard to achieve satisfactory control effect. How to reduce the strong coupling between tension and speed, is one of the important topics in gravure machine tension control.In order to improve the quality of presswork, aiming at the coupling between tension and speed, we must reconstruct the traditional control strategy, this paper presents a PID self-adaptive decoupling control algorithm. The research of this paper mainly based on Hooker's Law and the theory of Dynamic Moment Balance, then we establish mathematical model of the gravure machine's tension control system, and analyze the coupling relations between each tension zone of gravure machine, after that , we use the tool of MATLAB/Simulink to construct the simulation mode, then we adopt PID self-adaptive decoupling control algorithm for tension and speed and simulate to test the control effect, the simulation results show that this method can reduce the coupling degree between tension and speed than other methods, and also improve the control effect of the system, purpose the constant tension control.