Friction isolated rotary system for high-precision roll-to-roll manufacturing
Friction isolated rotary system for high-precision roll-to-roll manufacturing
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DOI：
10.1016/j.precisioneng.2020.12.018
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发表时间：
2021-03
影响因子：
3.6
通讯作者：
K. Woo;Xin Dong;Hyunchang Kim;Pyun-Gu Park;C. Okwudire
中科院分区：
文献类型：
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作者：
K. Woo;Xin Dong;Hyunchang Kim;Pyun-Gu Park;C. Okwudire
高精度卷对卷工艺被认为是制造柔性大面积薄膜电子产品最有前途的技术之一。然而，引导球轴承引起的宽带摩擦扰动会影响卷对卷系统中加工辊的精度，严重影响制造产品的质量。传统的反馈控制技术在减轻宽带摩擦扰动方面遇到困难。本文提出了一种用于高精度卷对卷制造工艺的新型旋转系统。系统中采用的摩擦隔离器 (FI) 是一种稳健且经济高效的机电一体化方法，可减轻连续打印过程中摩擦带来的不良影响。频域分析表明，与没有 FI 的情况相比，所提出的带有 FI 的旋转系统显着改善了摩擦扰动的衰减。旋转式 FI 的设计和优化旨在最大限度地减少轴承摩擦的不利影响，而不会过度牺牲机器的高刚性。然后使用设计的 FI 原型构建精密旋转系统。在原型摩擦隔离旋转系统上进行的实验表明，与不带 FI 的传统卷对卷系统相比，等速运动期间均方根跟踪误差降低了 61%。
High precision roll-to-roll processes are believed to be one of the most promising technologies for manufacturing flexible and large-area thin film electronics. However, broadband frictional disturbances caused by the guiding ball bearings affect the precision of the processing roller in the roll-to-roll system, severely hampering the quality of the manufactured products. Conventional feedback control techniques encounter difficulties in mitigating the broadband frictional disturbances. This paper presents a novel rotary system for high-precision roll-to-roll manufacturing process. Friction isolator (FI), a robust and cost-effective mechatronics method, is implemented in the system to mitigate the undesirable effects of friction during continuous printing processes. Frequency domain analysis shows that the proposed rotary system with FI achieves significantly improved attenuation of frictional disturbance, compared to the case without it. A rotary FI is designed and optimized to minimize the adverse effects of bearing friction without overly sacrificing the high rigidity of the machine. A precision rotary system is then built using the designed FI prototype. Experiments carried out on the prototype friction-isolated rotary system demonstrate up to 61% reduction in root-mean-square tracking error during constant velocity motion, compared to a conventional roll-to-roll system without FI.