Research On Quality Control Of Printing Color Based On The Control Model Of Color And Ink

With the development of socio-economic and the increasing of people's material needs, the color of the print quality requirements have become more sophisticated, which makes printing companies need to pay more attention to print color quality control. The common method of printing quality control is based on maunual adjustment or the experimental data, and the control effect is limited by human factors and experimental conditions, so it can not achieve the desired effect and the fundamental reason is the lack of theoretical basis. So the research on the theory model of color and ink is particularly important. On the other hand, the printing process is affected by many conditions, and it can not be avoided that the deviation between the actual model and the theoretical model, so we need to find an effective control method to achieve the print color quality control that can adapt to the changes and take the integeration of many factors into account.In this thesis, the mathematical modeling method and artificial intelligence technology are applied to solve the question mentioned above, and the printing color quality control techniques are studied.First of all, the ink transfer process of the printing press is analyzed to determine the model of ink key opening - the field density. By analyzing the structure of inking system, the ink transfer route is determined using the graph theory, and the model is bulid from ink key opening the establishment to the ink film thickness; through the experiments, the relationship model between the ink thickness and the field density; finally the model of ink key opening - field density is to be established.Secondly, based on adaptive fuzzy control, the quality control of printing color has been studied. First of all, the factors affecting print quality should be analyzed, and proposes a control scheme. Then, based on adaptive fuzzy control, the control rules should be designed using the theoretical model and the the adjustment program of control rules is given according to the actual situation. Then, the control algorithm is simulated and validated their results using Matlab's Simulink module. Finally, the analysis of impact of the inkvibrator's string action to ink transfer should be done, and the ink key opening that is output of fuzzy controller should be adjusted.Finally, the database based on SQL Server2000 and the software of printing color ink control curve modeling module using Visual C++6.0 as the platform and developed by MFC should be designed, and it is to achieve the data management of printing press inking system and process informations and the drawing of inking system structure, ink transfer route and the ink transfer ink key opening - field density curve. Then the control module of ink key opening should be designed, and achieve the printing quality control.