| Multi-channel temperature stability control is a key technology to realize RFID tag manufacturing and injet printing for flexible electronics.The hot-press temperature control in the Inlay manufacturing process has the requirements of multi-channels and high control precision.The heating plate temperature control in electrohydrodynamic jetting process has the characteristics of large control area and multi-channel coupling.This paper designes a MIMO temperature control system to satisfy the above requirements,and completes the mathematical modeling and experimental verification,the details are summaried as follows:1.The control scheme of MIMO temperature system is presented,including the design of temperature acquisition circuit,heating drive circuit and software.Furthermore,a multichannel control mathematical model is established.2.This paper proposes the MIMO temperature control system for RFID inlay manufacturing,and establishes a temperature control mathematical model of hot-press device.Furthermore,the multi-channel temperature control experiments and the RFID tags performance experiments are completed in the RFID tags manufacturing device,and the experiments show the temperature accuracy of each channel achieves ±1℃ and the RFID tags performed well.3.This paper proposes the MIMO temperature control system for the heating plate in electrohydrodynamic jetting.The heating plate coupling control model is established and the decoupling is realized.The heat transfer model of the heating plate is established and the temperature distribution was simulated.Furthermore,The control model parameter identification experiments,temperature control experiments and temperature distribution test are carried out in the electrohydrodynamic jetting device,and the experimental results show temperature distribution accuracy of heating plate reaches ±2.5℃.In conclusion,the MIMO temperature control system designed for RFID tag manufacturing and electrohydrodynamic jetting has been verified by experimental research and testing,indicating that it satisfies process requirements and has been applied to the actual production process. |
