• Title/Summary/Keyword: multi-span web transport system

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멀티스팬 연속공정 시스템의 장력 특성에 관한 실험적 연구

  • 신기현;권순오;천성민
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.917-920
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    • 1995
  • A mathematical model describing the relationship between longitudinal tension and tangential velocity of web/roller in a multi-span web transport system has been developed. An experiment was carried out for typical conditions to validate the mathematical model for tension behavior in a multispan system. A two-span prototype prototype web transport system with winder and unwinder was manufactured for the experiment. By comparing simulation and experimental results, the mathematical model for tension and velocity in a multi-span web transport system is confirmed to be valid for typical conditions. Tension transfer phenomenon was also confirmed though the simulation as well as experimentation.

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

  • Shin, Kee-Hyun
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.5
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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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A Study on the Fault Diagnosis of Roller-Shape Using Frequency-Domain Analysis of Tension Signals (장력신호의 주파수 해석을 이용한 롤 형상 이상 진단에 관한 연구)

  • Sin, Gi-Hyeon
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.12
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    • pp.107-114
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    • 2000
  • Rollers and rolls in the continuous process systems are noes of key components that determine the quality of web products. The condition of rollers and rolls(ex. eccentricity wear) should be consistently monitored in order to maintain the process conditions (ex. tension, edge position) within a required specification. In this paper, a new diagnosis technique is suggested to detect the defect of rollers/rolls (ex. eccentricity, wear) based on frequency domain analysis of web tension signal. The kernel of this technique is to use the spectrum amplitude of tension signal which allows to identify the fault rollers/rolls and to also diagnose the degree of fault in corresponding rollers and rolls. The experimental results proved that the suggested diagnosis technique can be successfully used to identify the defect rollers and rolls as well as to diagnose the degree of the defect of those rollers. The suggested technique can be applied to monitor and diagnose the shape of rollers and rolls in various multi-span web transport systems.

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