Model-based feedforward register control of roll-to-roll web printing systems

Chen, Zhihua; Zheng, Ying; Zhou, Minjing; Wong, David Shan Hill; Chen, Lijuan; Deng, Zongquan

doi:10.1016/j.conengprac.2016.03.009

Cited by 26 publications

(5 citation statements)

References 24 publications

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“…On the other hand, the axially moving web model also attracts much attention from researchers. The two‐span R2R web printing system was represented by the dynamic equations 9,10 where tension variation and register error are considered as state variables. Significantly, the authors took into account the change of web length between two adjacent units 10 .…”

Section: Introductionmentioning

confidence: 99%

Model‐free hierarchical control with fractional‐order sliding surface for multisection web machines

Dang

Nguyen

Tran

et al. 2022

Adaptive Control & Signal

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Due to the nonlinearities and dynamical properties of multisection web machines, it is essential to accomplish an appropriate mathematical model as well as design a compatible control scheme. A generalized fully driven web winding model is constructed taking unpredictable changes of moment of inertia and radius of rolls into consideration. In this article, a fractional‐order sliding surface algorithm‐based hierarchical control frame is applied to multisection web machines to deal with matched and mismatched uncertainties and disturbances. In addition, the Radius Basis Function neural network is deployed to estimate necessary system dynamics and the proposed control scheme taking advantage of first‐order low‐pass filters to produce virtual control signals without complicated calculation and attenuate the explosion of terms phenomenon. Finally, the semi‐global stability of the entire system is determined using Lyapunov's stability theory. The simulation results are presented to clarify the superior performance of robust control algorithm and approximation law in the presence of nonideal elements.

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Section: Introductionmentioning

confidence: 99%

Model‐free hierarchical control with fractional‐order sliding surface for multisection web machines

Dang

Nguyen

Tran

et al. 2022

Adaptive Control & Signal

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“…One of the most important parameters in the R2R process is the uniformity of the web obtained in the transverse direction. As such, the material of the web used to coat the electrolyte should be a thin, flexible, nonbreakable plastic film such as polyethylene terephthalate (PET) or polyimide (PI) [10][11][12]. Moreover, the web can be easily deformed by external forces due to the roll eccentricity and temperature fluctuations of the heater in the dryer during the movement of the web, which could deteriorate coating quality.…”

Section: Introductionmentioning

confidence: 99%

Web Unevenness Due to Thermal Deformation in the Roll-to-Roll Manufacturing Process

Lee

Kim

et al. 2020

Applied Sciences

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In roll-to-roll (R2R) processing, web uniformity is a crucial factor that can guarantee high coating quality. To understand web defects due to thermal deformation, we analyzed the effect of web unevenness on the coating quality of an yttria-stabilized zirconia (YSZ) layer, a brittle electrolyte of solid oxide fuel cells (SOFCs). We used finite-element analysis to study thermal and mechanical deformations at different drying temperature levels. A YSZ layer was also coated using R2R slot-die coating to observe the effect of web unevenness on coating quality. Web unevenness was generated by thermal deformation due to conduction and convection heat from the dryer. Because of varying web unevenness with time, the YSZ layer developed cracks. At higher drying temperatures, more coating defects with larger widths were generated. Results indicated that web unevenness at the coating section led to coating defects that could damage the SOFCs and decrease yield in the R2R process. Coating defects generated by web unevenness caused by convection and conduction heat should be considered in the high-volume production of brittle electrolytes using the R2R process.

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“…One of the most important parameters in the R2R process is the uniformity of the web obtained in the transverse direction. As such, the material of the web used to coat the electrolyte should be a thin, flexible and non-breakable plastic film like polyethylene terephthalate (PET) or polyimide (PI) [10][11][12]. Moreover, the web can be easily deformed by external forces due to the roll eccentricity and temperature fluctuations of the heater in the dryer during the movement of web, which could deteriorate the coating quality.…”

Section: Introductionmentioning

confidence: 99%

Web Unevenness due to Thermal Deformation in Roll–to–Roll Manufacturing Process

Jo¹,

Lee²,

Kim³

et al. 2020

Preprint

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In roll-to-roll (R2R) processing, uniformity of the web is a crucial factor that can guarantee high coating quality. To understand web defects due to thermal deformation, we analyzed the effects of web unevenness on the coating quality of an yttria-stabilized zirconia (YSZ) layer, a brittle electrolyte of solid oxide fuel cells (SOFCs). We used finite element analysis to analyze the thermal and mechanical deformations at different drying temperatures. A YSZ layer was also coated using R2R slot-die coating to observe effects of web unevenness on the coating quality. It was seen that web unevenness was generated by thermal deformation due the conduction and convection heat from the dryer. Owing to varying web unevenness with time, the YSZ layer developed cracks. At higher drying temperatures, more coating defects having larger widths were generated. Results indicated that web unevenness at the coating section led to coating defects, which could damage the SOFC and decrease its yield in the R2R process. From this study, we suggest that coating defects, generated by the web unevenness owing to the convection and conduction heat, should be considered for the high-volume production of brittle electrolytes using the R2R process.

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Model-based feedforward register control of roll-to-roll web printing systems

Cited by 26 publications

References 24 publications

Model‐free hierarchical control with fractional‐order sliding surface for multisection web machines

Model‐free hierarchical control with fractional‐order sliding surface for multisection web machines

Web Unevenness Due to Thermal Deformation in the Roll-to-Roll Manufacturing Process

Web Unevenness due to Thermal Deformation in Roll–to–Roll Manufacturing Process

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