| Printed electronic ink-jet printing technology has the advantages of high efficiency,low consumption,and environmental protection,and is widely used in the production of printed circuit boards(Printed Circuit Board,PCB).The workbench is the core component of the printed electronic ink-jet printer,whose motion stability and positioning accuracy are the main factors that affect the quality of PCB production.At present,the design of the ink-jet printer workbench mainly relies on the experience of the engineer,and its structural performance is difficult to meet the design requirements;in addition,the linear motor drive mode of the ink-jet printer workbench increases the control difficulty of the servo system.Therefore,it's of great significance to optimize the design of the structure and control parameters of the ink-jet printer workbench to improve the quality of the printed electronic ink-jet printer.Based on the analysis model of the ink-jet printer workbench,the thesis optimizes the design of its mechanical structure and control parameters and uses the co-simulation technology to verify the feasibility of the optimization results.The main research contents and conclusions are as follows:(1)The working principles of ink-jet printer are introduced,Siemens NX is used to establish the structural model of the ink-jet printer workbench,and the finite element model in ANSYS is established to analyze the static and dynamic characteristics.The weakness of the structure was identified,which laid a foundation for subsequent structural optimization design.(2)Siemens NX and ANSYS are Integrated based on the ISIGHT platform.With weight reducing and static and dynamic performance improvement as the optimization objective,this research employed the optimized Latin hypercube methods to analyze the sensitivity of the design variables,and the multi-objective genetic algorithm NSGAII to optimize the ink-jet printer workbench structure.The optimization results show that the weight of the ink-jet printer workbench is reduced by 33.62% while the maximum deformation is reduced by 44.13%,and the first-order natural frequency is increased from 43.34 Hz to 75.93 Hz,effectively avoiding the resonance region caused by the motor.(3)Based on the analysis of the three closed-loop control structure of the servo system,the current loop,the speed loop and the position loop are modeled,and the simulation analysis and parameter setting from inside to outside are carried out by MATLAB / Simulink.In order to optimize the performance of servo control system,a kind of fuzzy PID controller is designed,which can modify PID parameters in real time.The simulation results show that compared with the conventional PID,the fuzzy PID is not only faster in response speed,but also stronger in anti-interference ability,which improves the dynamic performance and steady-state accuracy of the system.(4)Through the co-interface of ADAMS and MATLAB/ Simulink,the mechanical system model and control system model established above are organically connected,and the electromechanical co-simulation platform is constructed.The results of the cosimulation are compared with those of the real prototype.The results show that the optimization effectively improves the motion stability and positioning accuracy of the ink-jet printer workbench. |
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