Abstract
A nonlinear and coupling model is established according to the multi-layer register system working principle in gravure printed electronic equipments, and then, the linear model of the register system is constructed based on one order Taylor formula. In order to improve the speed and accuracy of register control, a feedforward PID control algorithm is presented according to the linear model in multi-layer register system. This algorithm is unique in that it uses the PID to adjust the inputs of the register system, and feedforward compensation for the known disturbance, making the register control accuracy has been greatly improved. The simulation shows that the proposed register controller is able to realize a high precision control for the register system and endowed with better control performance than PID controller in register control.
Highlights
Just as the register process in traditional color printing, all parts of printed electronics can be precipitated by ink formation layer and layer correspondent to electronic materials through the method of gravure printing, and the quality of printed electronics is controlled by each layer of register accuracy
Register error, reflecting the direct index of register accuracy, comprises print-direction register and cross-direction register errors which dominated by the factors of each roller speed, web tension, web property, manufacturing and fixing errors
From the Eq 2, it could read that the influence of register error e12ǃe23ǃe34 are the traction tension T0 and the speed of first roller V1, besides the corresponding roller speed V2ǃV3ǃand V4
Summary
Just as the register process in traditional color printing, all parts of printed electronics can be precipitated by ink formation layer and layer correspondent to electronic materials through the method of gravure printing, and the quality of printed electronics is controlled by each layer of register accuracy. The thesis will discuss about it in terms of the cross-direction register, without the condition of explanation Kang designed his model based on the register error definition and feedforward PID controller with speed volatility of contiguous roller as the foregone interference[1,2]. He ignore the influence of traction tension in register error. Liu establish the relation among register error, roller speed and web tension, and design controller with method of active disturbance rejection control[5,6]. On the basis of linear model, feedforward PID register controller is designed in terms of the disturbance of tension and speed. The simulation shows that the proposed register controller is endowed with better control performance than PID controller in register control
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