Design And Research On Stacker Control System Of Automated Stereoscopic Warehouse

Stacker as a core part of the automated warehouse,the level of efficiency of its work directly affects the speed of the entire warehouse operation.The paper improves response speed of the stacker servo control system to realize that stacker finish storage and delivery operation in the shortest time.Therefore,it is significant that this paper takes the stacker in automatic storage warehouse system as the research object,and the mainly research contents include:First of all,this paper summarizes the composition and working principle of the stacker control system,realizes storage and delivery operation of stacker by using upper computer,PLC and frequency converter as an integrated control system,and determines overall design of the stacker control system according to its control requirement.Secondly,the Siemens S7-300 PLC is used as the logic control device of the stacker,the SEW frequency converter is used as the servo controller,and the rotary encoder and the bar code reader are used as the feedback signal device of the speed loop and the position loop respectively.According to the request of the stacker control system,this paper takes the selection and configuration of the devices and hardware designs.Finally,the SIMATIC WinCC flexible configuration software is used to design the Human Machine Interface(HMI).In order to realize the real-time communication between HMI and equipments,the variable configuration and PROFINET connection is designed,to monitor the stacker running status,position and alarm information.In this paper,STEP7 software is used for programming the stacker.MT-Manager,which is SEW frequency converter dedicated software,is also used for parameter setting and debugging of the servo control system.With using the traditional PI control method,speed feed-forward control method and acceleration feed-forward control method are also adopted in SEW frequency converter.The experimental results from MT-Manager software show that stacker servo control system comes with higher control accuracy and faster response performance after introducing the speed feed-forward control method and the acceleration feed-forward control method in the frequency converter.