Modeling And Analysis Of Thermal Bubble Ink-jet Printer Based On Hybrid System Theory

This thesis discussed the method of hybrid modeling and simulating the thermal bubble ink-jetting process. First, the numerical model based on a one-dimensional heat conduction equation, an equilibrium press-temperature relation, energy and mass conservation relations. The heat conduction equation is used to represent the energy transfer between the bubble and the surrounding liquid, as well as the temperature distribution in the liquid-gas interface layer. The pressure-temperature relation is used to consider the growth and the collapse of the bubble. The model from the perspective of continuous variable dynamic system describing the process of an ink droplet injection. Second, This paper introduces the basic theory of hybrid systems, and discusses the existing hybrid system model approach to compare their respective advantages and disadvantages. On this basis, the analysis of hybrid characteristics of the ink-jet process proposed Hybrid Petri Net (HPN) modeling ideas. Then the paper research the use of Simulink and Stateflow simulation method of the HPN by the Matlab. Finally, the model of the thermal bubble-jet printer ink-jet printing process is established by HPN modeling methods. Parameters in ink-jet process are analyzed through simulation of the model. The bubble generation temperature, initial pressure and the operation parameters are discussed in this model. The result provides a basic guide to the design of high-performance ink-jet print head and drive circuitry.