Dynamics and Feedback Control of Electrospinning Processes
Abstract: Due to its superb flexibility, efficiency, and tractility, flexible electronic production is widely used in the manufacturing of thin thin-film film solar cells, microscale sensors, high-resolution resolution displayers, illumination equipments, and integrated artificial tissues. Electrospinning is an essential procedure in flexible electronic production, where a microscale/nanoscale fiber is dragged from a Taylor cone by a static electrical trical field power and afterward be deposited onto a flexible substrate. In this brief, we established a closed closed-loop loop control system of electrospinning processes composed of a high-speed speed camera, an National Instruments (NI) image processor, an NI controller,, a control signal amplifier, and a high high-voltage voltage static electricity supplier. It is the first time to apply model predictive control on practical electrospinning processes to modulate the diameter of electrospinning fiber subject to external disturbances aand nd uncertainties. Extensive experimental results have shown that the fiber diameter becomes tunable and stabilized by the closedclosed loop controller, which is beneficial to enhance the consistency and controllability of the microelectrical elements. More signi significantly, ficantly, the adjustability of fiber diameter enables the manufacturing of more specified structures like islandisland bridge microstructure widely used in microscale sensors and electrical unit manufacturing and tissue engineering.