Reflective Membrane Tension Of The License Plate Semi-finished Automatic Production Line Of Fuzzy Control And Network Control System Design

The thesis starts with the producing technological process firstly and designs the first domestic automatic product line of the vehicle licence plate's semi-products. And through the analysis of the main control objects of the automatic production line, we choose the unwinding tension control system of the aluminium cingulum's sticking tache as the research object. Then, it sets up the tension control system's models listed below separately: the tramission model of AC servo, the tension model, the real-time film roll's diameter model, the acting force model of the tension arm, the dynamics model of the unwinding process and it has an analysis and research on them. On the basis of this, it makes a further research on the fuzzy control and fuzzy-PID self-regulating algorithm of the reflective film's unwinding tension control system and carries on the simulation to the corresponding control models.Secondly, this thesis combines the network control technology with the control system to study the network control system based on PROFffiUS. It divides the control system into three layers from the structure, namely: the equipment control layer, process control layer and management layer. The equipment layer regards S7-200 PLCs as core of the control .It makes synthetical monitoring and control to various kinds of instruments, electrical machinery, valve, switch and so on in the scene through measuring various kinds of parameters on-the-spot. The process control layer consists of S7-300 CPU 313 C-2DP mainly. As the middle layer, it finishes the control to the subordinate equipment on one hand and conveys the on-the-spot data to the upper management layer through industry Ethernet on the other hand. The management layer needs to fulfil mainly the long-range control and production management,etc.In addition, this thesis introduces the control system's software programming process briefly from the following aspects: the touch panel's software design, the PROFffiUS master station and slave stations' control software design. And, it also gives the corresponding control flowcharts.