Research And Design Of Distributed Control System For Brick Tea Production Line

Brick tea,as one of the financial tax sources of military and political expenditure in the western and northern regions,is an important trade material on the "Silk Road".However,the existing brick tea production line has problems such as low level of automation and informatization,low production efficiency,substandard sanitary conditions,etc.,which are difficult to meet the actual needs,Therefore,it is urgent to upgrade the brick tea production line automatically.Based on the Hubei Provincial Scientific and Technological Innovation Project “Research and Development of Energy-efficient and High-efficiency Brick Tea Pressing Automatic Production Lines”,this paper fully investigated the research status and technical requirements of brick tea production lines at home and abroad,and designed the overall plan of the distributed control system for brick tea production lines,dividing the whole production line into multiple subsystems for control.The main work of this article is as follows:1.The idea of industrial distributed control is introduced into the design process of automation control system of brick tea production line,and the software and hardware design of each subsystem is given,which mainly includes the device selection,electrical schematic design,HMI program design,communication scheme design and PLC control program design of each subsystem.Then through field debugging,the correctness and feasibility of the software and hardware design of some subsystems were verified,and the control effect reached the expected design requirements.2.Aiming at the problem of dual-motor synchronous control in the packaging subsystem,this paper takes the permanent magnet synchronous motor as the control object,and studies its position servo control and dual-motor synchronous control technology.Firstly,the modeling process of single-motor position servo control under Simulink is described.Secondly,the position loop selection controller is introduced to shorten the adjustment time of the position loop.According to the lack of cross-coupling synchronization structure,fuzzy controller is used to realize the cross-coupling factor Real-time adjustment.Finally,by adding a synchronization error acceleration compensator,the tracking performance of the system after disturbance is improved.The simulation results show that the improved control strategy not only improves the accuracy of the dual-motor synchronous control,but also shortens the transition time to recover the reference speed after the motor is disturbed.