• 제목/요약/키워드: Web tension control

검색결과 37건 처리시간 0.023초

이송중인 웹의 장력 및 사행제어 (Control of Longitudinal Tension and Lateral Position of a Moving Web)

  • 신기현;권순오
    • 한국펄프종이공학회:학술대회논문집
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    • 한국펄프종이공학회 2002년도 추계학술발표논문집
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    • pp.74-80
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    • 2002
  • A mathematical tension model for a moving web in a multi-span web handling system was derived and validated by using a simulator which includes unwinder, driven roller, winder, load cells, controllers, etc. A tension controller was designed to compensate tension disturbances generated by velocity changes of the unwinder and driven roller. From experimental results it was proved that the tension model properly expressed the tension behavior of a moving web for specific conditions. The distributed tension controller designed by using the pole-placement technique compensated the tension disturbances transfered from upsteram tension variation. Interactions between web spans including "tension transfer phenomenon" were clearly confirmed through the study. A mathematical model of lateral motion of a moving web was verified also by using the same experimental apparatus which includes displacement type guidance systems. And a feedforward control strategy was designed for more accurate control of the lateral motion of a moving web, which utilize a measured signal of the lateral displacement of web in a previous span and a more correctly identified mathematical model to estimate the disturbance of lateral motion from the previous span. This approach was turned out to be effective in improving the performance of the guidance system for more wide range disturbances.

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장력과 사행거동의 상호작용에 관한 실험적 연구 (An experimental study on the relationship between longitudinal and lateral motion of a moving web)

  • 신기현;권순오
    • 한국펄프종이공학회:학술대회논문집
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    • 한국펄프종이공학회 2003년도 추계학술발표논문집
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    • pp.209-216
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    • 2003
  • There are two kinds of controllers in a continuous process system. One is for tension control of a moving web and the other for lateral motion control. The inter-connection between tension and lateral behaivior of web has not yet been considered in the analysis of web dynamics and designing of control stragagies. But the effect of tension variation on the lateral motion of a moving web is observed in the most manufacturing systems. In this paper, experimental studies was carried out to find out the inter-correlation between tension and lateral motion of a web using a 3-span web transport system which consists of two displacement type guiders. As a result, it was found that there are typical operating conditions that tension and lateral motion are correlated each other.

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직접 STR을 이용한 웹 이송 시스템에서의 장력제어 (Tension Control in Web Transport System using Direct Self-tuning Regulator)

  • 오기석;권태종;한창수;강남기;조형진
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1996년도 추계학술대회 논문집
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    • pp.236-242
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    • 1996
  • The purpose of this paper is to study the tension control in a web transport system. Direct self-tuning regulator method was applied to tension controller and variable-gain PID control algorithm was applied to web speed controller. The designed controllers compensated for the time-varying parameters and tracked reference tension in process speed changing. The simulation shows that direct STR tension controller improves tension control performance in comparison with other controllers.

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멀티-스팬 연속 공정 시스템의 실시간 장력 제어 (Real-Time Tension Control in a Multi-Span Continuous Process System)

  • 신기현
    • 한국정밀공학회지
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    • 제12권5호
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    • pp.108-116
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    • 1995
  • A tension control strategy for a multi-span web transport system is proposed. This strategy is developed by using the tension transfer phenomena in multi-span systems. The performance of this control strategy is compared with that of an existing control strategy through a computer simulation. A real-time software is designed based on the proposed tension control stration of master speed drive in tension control is demonstrated.

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Web Tension Control Using Output Feedback

  • Oh, Seung-Rohk
    • 전기전자학회논문지
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    • 제11권4호
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    • pp.213-218
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    • 2007
  • We consider a web transport system. The objective of this paper is to design the output feedback controller such that the controller can track a desired tension and processing speed on web transport system. We propose the new design method using observer and feedback linearization technique. The proposed method use a nonlinear feedback to transform to linear system and high gain observer to estimate the state value. We show that the proposed controller can achieve the control object using only output. We show a performance of controller via the simulation.

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Two-Drum Winder 권취 공정 시스템에서의 적용 PID 제어기를 이용한 장력제어 (Tension Control Using Adaptive PID Controller in the Two-Drum Winder Web Transport System)

  • 최승규;이동빈;임화영
    • 제어로봇시스템학회논문지
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    • 제6권9호
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    • pp.813-821
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    • 2000
  • In this paper, we developed modeling of tension and speed dynamics for a two-drum winder in a three span continuous web transport system which had not been previously. Dynamic modeling of the time-varying nonlinear system was derived by considering the effect of the radii and mass moment of inertia in the unwinder and the two-drum winder through winding up the web. After linearizing it, we designed with a variable-gain a PID controller for tension control and a PI controller for speed. Simulation is carried out with the variation of radii and moment of inertia at high speed for the proposed tension control system with the two-drum winder and the variavle-gain a PID controller. Results show good performance of tension control during the speed change speed at a start-up and stop.

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웹재료의 와인딩 공정을 위한 제어기 설계 (Controller Design for Web Winding Process)

  • 박기홍;허승진
    • 한국정밀공학회지
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    • 제20권5호
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    • pp.99-107
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    • 2003
  • In a winding process, important control specifications include regulation of web tension and velocity. In this research, an adaptive controller has been developed for controlling web tension and velocity in winding processes. For the controller design, the linear quadratic regulator theory has been adopted and a gain-scheduling scheme has been incorporated. A prototype winding system has been constructed, and the controller has been implemented in a real-time PC-based environment. The performance of the closed loop system has been evaluated via simulation and experiments, and it was observed that both the web tension and velocity could be regulated within a small tolerance.

연속공정 시스템에서의 장력의 가변이득 PID 제어 (Variable-Gain PID Control of Longitudinal Tension in Web Transport System)

  • 신기현
    • 대한기계학회논문집
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    • 제19권3호
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    • pp.724-730
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    • 1995
  • Fixed-gain and variable-gain PID control of tension in the winding section of a simple web transport system were evaluated. An open-loop mathematical model for the web transport system was derived and used for the design of the PID controllers. The winding roll radius is a timevarying parameter in the model. The fixed-gain PID controller designed at a particular instant of time could not meet the desired specifications, whereas the variable-gain PID controller could produce accurate tension control in the winding section. An advantage of the variable-gain control is its simplicity. This approach is easy to implement and shows promise for applications where the time-varying parameters are easily measured.

비선형 장력 제어 시스템 설계 (The design of web tension control system using nonlinear feedback)

  • 오승록;오동철
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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    • pp.164-166
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    • 2005
  • We consider a web transport system. The objective of this paper is to design the controller such that desired tension and processing on web transport system. We propose the new design method which is independent with operating condition. The proposed method used a nonlinear feedback to transform to linear system. We show a performance of controller via the simulation.

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비선형 궤환을 이용한 장력 제어 시스템 설계 (The Design of Web Tension Control System Using a Nonlinear Feedback)

  • 오승록
    • 대한전기학회논문지:시스템및제어부문D
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    • 제55권1호
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    • pp.14-16
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    • 2006
  • We consider a web transport system. The objective of this paper is to design the controller such that desired tension and processing on web transport system. We propose the new design method hick is independent with operating condition. The proposed method used a nonlinear feedback to transform to linear system. We show a performance of controller via the simulation.