2B11 Adaptive control for a rewinding process of a high-speed roll-to-roll system

2010 ◽  
Vol 2010 (0) ◽  
pp. _2B11-1_-_2B11-10_
Author(s):  
Quoc Chi Nguyen ◽  
Quang Hieu Ngo ◽  
Keum-Shik Hong
Keyword(s):  
Adaptive Control ◽  
High Speed ◽  
Roll To Roll ◽  
Roll System

scholarly journals Adaptive control for a rewinding process of a roll-to-roll system

2015 ◽  
Vol 18 (3) ◽  
pp. 16-27
Author(s):  
Chi Quoc Nguyen ◽  
Hung Nguyen
Keyword(s):  
Adaptive Control ◽  
Asymptotic Stability ◽  
Control Force ◽  
Roll To Roll ◽  
Transverse Vibrations ◽  
Control Scheme ◽  
Control Schemes ◽  
Transport Velocity ◽  
Uniformly Asymptotic Stability ◽  
Roll System

In this paper, transverse vibration and transport velocity controls of a moving web in a rewinding section of a roll to roll system are investigated. The moving web is modeled as an axially moving beam. Two independent adaptive control schemes are proposed. The first control scheme using a control force exerted from a hydraulic actuator is to suppress transverse vibrations of the moving web of unknown mass per unit length under a spatially varying tension and a time-varying transport velocity. The second control scheme using a control torque applied to the rewind roller is to maintain the transport velocity levels of the moving web in spite of disturbances such as the variations of rotating elements and unknown bearing friction. From the decentralized control viewpoint, the uniformly exponential stability for suppressing the transverse vibrations and the uniformly asymptotic stability for maintaining the transport velocity are achieved. However, as a whole, the uniformly asymptotic stability is concluded. Simulations for demonstrating the effectiveness of the proposed control schemes are presented.

Multimode Adaptive Control for Tank Gun Control System Based on Tracking Differentiator

2011 ◽  
Vol 383-390 ◽  
pp. 79-85
Author(s):  
Dong Yuan ◽  
Xiao Jun Ma ◽  
Wei Wei
Keyword(s):  
Adaptive Control ◽  
Control System ◽  
High Speed ◽  
Control Method ◽  
Reference Model ◽  
Gun Control ◽  
Math Model ◽  
Tracking Differentiator ◽  
Switch Control ◽  
Model Reference Adaptive

Aiming at the problems such as switch impulsion, insurmountability for influence caused by nonlinearity in one tank gun control system which adopts double PID controller to realize the multimode switch control between high speed and low speed movement, the system math model is built up; And then, Model Reference Adaptive Control (MRAC) method based on nonroutine reference model is brought in and the adaptive gun controller is designed. Consequently, the compensation of nonlinearity and multimode control are implemented. Furthermore, the Tracking Differentiator (TD) is affiliated to the front of controller in order to restrain the impulsion caused by mode switch. Finally, the validity of control method in this paper is verified by simulation.

An Investigation onto Polydimethylsiloxane (PDMS) Printing Plate of Multiple Functional Solid Line by Flexographic

2013 ◽  
Vol 844 ◽  
pp. 158-161 ◽  
Author(s):  
M.I. Maksud ◽  
Mohd Sallehuddin Yusof ◽  
M. Mahadi Abdul Jamil
Keyword(s):  
Laser Ablation ◽  
Line Width ◽  
High Speed ◽  
Printed Electronics ◽  
Low Cost ◽  
Flexible Substrates ◽  
Large Area ◽  
Printing Plate ◽  
Roll To Roll ◽  
Printing Processes

Recently low cost production is vital to produce printed electronics by roll to roll manufacturing printing process like a flexographic. Flexographic has a high speed technique which commonly used for printing onto large area flexible substrates. However, the minimum feature sizes achieved with roll to roll printing processes, such as flexographic is in the range of fifty microns. The main contribution of this limitation is photopolymer flexographic plate unable to be produced finer micron range due to film that made by Laser Ablation Mask (LAMs) technology not sufficiently robust and consequently at micron ranges line will not be formed on the printing plate. Hence, polydimethylsiloxane (PDMS) is used instead of photopolymer. Printing trial had been conducted and multiple solid lines successfully printed for below fifty microns line width with no interference between two adjacent lines of the printed images.

scholarly journals High Speed Roll-to-Roll Printable Transistor Enabled by a Pulsed Light Curable CNT Ink

2019 ◽  
Vol 3 (2) ◽  
pp. 33
Author(s):  
Peter Mack Grubb ◽  
Farzad Mokhtari Koushyar ◽  
Travis Lenz ◽  
Aref Asghari ◽  
Gongwen Gan ◽  
...  
Keyword(s):  
High Speed ◽  
Flash Lamp ◽  
Pulsed Light ◽  
Production Methods ◽  
On Demand ◽  
Roll To Roll ◽  
Drop On Demand ◽  
Visible Light Range ◽  
Strong Energy ◽  
Triton X

This paper reports the first high speed roll-to-roll printable transistor using a carbon nanotube (CNT) semiconducting layer. The transistor is made possible through the development of a pulsed light curable CNT ink compatible with typical drop on demand inkjet cartridges. This CNT ink uses a xylene based solvent with methanol, glycerin, and Triton X-100 modifiers to create an evaporable solution with appropriate absorption spectra for a mercury or xenon flash lamp with strong energy transmission in the UVB to mid visible light range, allowing the solution to absorb the energy from the flash lamp and evaporate. Transistor dimensions were defined by the capabilities of a typical roll-to-roll drop on demand cartridge. The final device demonstrated an on/off ratio of 104, representing performance similar to gravure printed devices. This represents the first CNT ink which can be used in high speed production methods without long thermal curing steps in the workflow.

A Feasibility Study of Roll to Roll Printing on Graphene

2015 ◽  
Vol 799-800 ◽  
pp. 402-406 ◽  
Author(s):  
S. Hassan ◽  
Mohd Sallehuddin Yusof ◽  
M.I. Maksud ◽  
M.N. Nodin ◽  
Noor Azlina Rejab
Keyword(s):  
High Speed ◽  
Electronic Device ◽  
Electronic Devices ◽  
Printing Industry ◽  
Micro Scale ◽  
Roll To Roll ◽  
Printing Technique ◽  
Printing Ink ◽  
Variable Substrate ◽  
Printing Techniques

Roll to roll process is one of the famous printing techniques that are possible to create graphic and electronic device on variable substrate by using conductive ink. Graphene is an example of material that can be used as printing ink which usually used in producing micro-scale electronic devices. Here, it is proposed that extending roll to roll printing technique into the multiple micro-scale printing fine solid line onto substrate by using graphene as a printing ink. Flexography is a high speed roll to roll printing technique commonly used in paper printing industry. And this study elaborates the feasibility of graphene as a printing ink use in combination of flexography and micro-contact or micro-flexo printing for micro fine solid line. This paper will illustrates the review of graphene in producing multiple micro-solid lines printing capability for the application of printing electronic, graphic and bio-medical.

EFFECTIVE NUMERICAL ANALYSIS METHOD APPLIED TO THE ROLL-TO-ROLL SYSTEM HAVING A WINDING WORKPIECE

2015 ◽  
Vol 39 (3) ◽  
pp. 615-624
Author(s):  
Sungham Hong ◽  
Juhwan Choi ◽  
Sungsoo Rhim ◽  
Jin Hwan Choi
Keyword(s):  
Numerical Analysis ◽  
System Analysis ◽  
Analysis Method ◽  
Contact Algorithm ◽  
Numerical Analysis Method ◽  
Roll To Roll ◽  
Length Estimation ◽  
Flexible Workpiece ◽  
Precise Analysis ◽  
Roll System

The design and development of Roll-to-Roll (R2R) system has been mainly executed by the expert’s experience. There are some important issues in the numerical analysis method about a roller path and the control of the R2R system. This study proposes the efficient R2R system analysis methods. The first one is an Approximated Winding Length Estimation (AWLE) algorithm which can calculate the analytic winded length of a workpiece. The winder can be approximated with line and arc segments at this algorithm. As a result, in the numerical model of the R2R system, we can replace the winder characteristics with the AWLE algorithm. The second one is the contact algorithm between workpiece and rollers. This contact algorithm must be stable and fast for precise analysis. The third one is the flexible workpiece model. The workpiece can be modeled by finite elements. By describing the implementation of these important methods, this paper proposes an efficient R2R system analysis method.

A Precise Position Measurement System of Roll-to-Roll Printing Using Burst Alignment Patterns

2018 ◽  
Author(s):  
Taehyeong Kim ◽  
Dongho Oh ◽  
Youngjin Kim ◽  
Jihyeon Kim ◽  
Byeongcheol Lee
Keyword(s):  
Measurement System ◽  
High Speed ◽  
Printed Electronics ◽  
High Volume ◽  
Measurement Range ◽  
Generation Process ◽  
Position Measurement ◽  
Process Technology ◽  
Precise Position ◽  
Roll To Roll

Printed electronics is a next-generation process technology that is suitable for high speed and high volume production and can make electronic devices and circuits on flexible materials. To commercialize printed electronics, it is necessary to improve the alignment precision of printing. In order to improve the alignment precision of the roll-to-roll process, accurate measurement of the web position is required. Therefore, in the previous research of this paper, we proposed a measurement system of the moving direction and the lateral movement using an encoder. However, in the previous study, the direction of error control had to be set according to the measurement position of the encoder, and the measurement range was so narrow. In this paper, we propose a measurement system that can detect the direction of error and increase the effective measurement range using the burst alignment pattern that generates the burst signal. Applying it to roll-to-roll printing position measurement systems, measurements can be performed with greatly improved efficiency and measurement range.

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