Modeling and control of a web-fed machine

Chen, Chieh Li; Chang, Kuo Ming; Chang, Chih Ming

doi:10.1016/j.apm.2004.04.005

Cited by 31 publications

(18 citation statements)

References 10 publications

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“…Shin (2000) suggested a distributed tension control using auxiliary dynamic models, whereas Song and Sul (2000) proposed a feedforward control with a tension observer to improve the transient performance. Controllers based on soft-computing tools, such as neural networks and fuzzy logic were also developed to tackle these problems (Chen, Chang, &Chen, 2004 andYeung, Falkner, &Gergely, 1995). In general, it is difficult for a classical method such as the feedforward loop and model modification to effectively attenuate the impact of speed variations on tension control, especially when the plant model contains uncertain parameters.…”

Section: Introductionmentioning

confidence: 99%

Robust control of multistage printing systems

Dou¹,

Wang²

2010

Control Engineering Practice

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Section: Introductionmentioning

confidence: 99%

Robust control of multistage printing systems

Dou¹,

Wang²

2010

Control Engineering Practice

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“…In the controller design task, a simple additional compensator relying on other local agent measurements was included in the feed-forward loop to ensure closed-loop stability. Studies have also proposed optimal state-feedback [24], [25] and neural-network-based schemes [26] involving parameter dependence. The desired tension and web transport velocity references are automatically obtained to meet the predetermined web longitude regulation performance based on the full-state feedback differential flatness method [27].…”

Section: Introductionmentioning

confidence: 99%

Velocity-Sensorless Decentralized Tension Control for Roll-to-Roll Printing Machines

Kim

2020

IEEE Access

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This paper presents a velocity-sensorless decentralized tension control scheme without true machine parameter dependence for roll-to-roll printing machines. Both the nonlinear nature and parameter uncertainties are taken into account the development task. As the first merit, the proposed observer eliminates the requirement of velocity feedback without any plant information even the nominal parameters. The introduction of the active-damping with the estimated state reduces the closed-loop system order to 1 by the pole-zero cancellation using the specified feedback gains. Finally, the disturbance observer (DOB) replaces the regulation error integrators with the closed-loop robustness improvement against the high-frequency disturbances. The MATLAB/Simulink-based simulations validate the effectiveness of the proposed decentralized scheme. INDEX TERMS Roll-to-roll printing machine, decentralized control, observer, pole-zero cancellation.

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“…The R2R dynamics model is based on the laws of physics: (i) Hooke's law allows for web elasticity, (ii) Coulomb's law explains the contact between the web and the roll, including friction, (iii) the mass conservation *For correspondence law allows for the coupling between the speed and the tension of the web and (iv) the second fundamental relation of dynamics accounts for variations of the rotating speeds [5]. Many researchers over the years applied this approach to develop the web tension-velocity model in an R2R system [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A parametric study on the dynamics of two-span roll-to-roll microcontact printing system

Ali

Hawwa

2019

Sādhanā

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The recent trend towards micro-patterning of thin film webs brought stricter manufacturing tolerances than traditionally admissible vibration levels. Therefore, one has to consider roll-to-roll (R2R) systems with their system dynamics model encompassing all systems' components, namely, the axially moving web(s), the rotating rolls and other accessories. In this study, the dynamic characteristics of an axially moving web in a two-span R2R system are investigated. Influence of geometrical parameters on the R2R dynamics and the parametric resonances of the moving web is presented. The time variations of web axial speed and webtransmitted tension are rigorously obtained by solving the web tension-roller angular speed equation, which is obtained from the conservation of mass law. The effects of system parameters such as length of the web, inertia of idler roll and radius of the rewinding/unwinding roll on the angular speed and web-transmitted tension have been discussed. The axially moving web was modelled as a string, which was mathematically represented by a second-order hyperbolic partial differential equation. The effect of the frequency of the disturbance at the roll on the web dynamics is also discussed. The transverse vibration response at selected points on the web shows higher frequency fluctuations corresponding to lower transport axial speed. It is noted that instability in the transverse response will occur when the first and second frequencies of the oscillation converge.

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Modeling and control of a web-fed machine

Cited by 31 publications

References 10 publications

Robust control of multistage printing systems

Robust control of multistage printing systems

Velocity-Sensorless Decentralized Tension Control for Roll-to-Roll Printing Machines

A parametric study on the dynamics of two-span roll-to-roll microcontact printing system

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