• Title/Summary/Keyword: Tension Wire

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Scheme of Tension control for the Stringing Trolley Wire (가선 트롤리선의 장력제어 시스템 구성)

  • Jung, Seoung-Hwan;Hong, Soon-Ill;Hong, Jeng-Pyo
    • Journal of Advanced Marine Engineering and Technology
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    • v.32 no.6
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    • pp.948-954
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    • 2008
  • Now, but task for stringing trolley wire is worked manually by a measurement of dip, we need to development the automatic control system for a safety and effective tasks. In this paper, in works of stringing trolley wire by a mobile of robot, a method is proposed tension control for the stringing trolley wire. On the basics of a wire model with hard nonlinear, ac servo motor model for torque generating and stringing wire tension, the tension control scheme is design and implemented with a detected wire tension by a load cell. We experimentally show that the performance of the tension response are satisfactory to regulator tension. The proposed system is simulated and experimented, results is verified the utilities.

Vibration Characteristics and Tension Control of a Wire in WEDM (와이어 방전가공기용 와이어의 진동 특성과 장력 변동 조절)

  • Chae, Ho-Joong;Lee, Seung-Yop
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.11a
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    • pp.629-635
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    • 2000
  • Vibrational characteristics and tension fluctuation of a translating wire in WEDM are the main problems to deteriorate the cutting accuracy and processing performance. In this paper, we analyze natural frequencies of the wire used in WEDM, both theoretically and experimentally. To reduce the tension variation of the wire. which directly affects cutting performance. we have designed a simply tension reduction device using springs and rollers. It is shown that tension fluctuation is reduced about 25% using the passive tension controller.

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Automatic Control System for the Stringing Transmission Wire by the Measured Tension (장력측정에 의한 가설 송전선의 시스템 자동화)

  • Hong, Jeng-Pyo;Hong, Soon-Ill
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.8
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    • pp.31-37
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    • 2008
  • As transmission line is installed by manual operation, it is necessary to scheme the automatic system for stringing transmission wire. For this necessity, the objective of this paper is developed automatic control system for a stringing of transmission wire. In this paper, transmission wire with suspended pattern and ac servo motor for torque generating are modeled. On the basis of wire model, algorithms to determine the reference tension is presented, so as the dip of transmission wire is keep constancy. The control scheme is proposed by the ac servo motor for torque generation and a load cell for a detected tension of transmission wire and implemented. We experimentally show that the performance of the tension response is satisfactory. And also proposed scheme verified the utilities for tension control of transmission wire.

A kind of NiTi-wire shape memory alloy damper to simultaneously damp tension, compression and torsion

  • Han, Yu-Lin;Yin, Hai-Yang;Xiao, Er-Tian;Sun, Zhi-Lin;Li, Ai-Qun
    • Structural Engineering and Mechanics
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    • v.22 no.2
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    • pp.241-262
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    • 2006
  • NiTi-wire shape memory alloy (SMA) dampers, that utilize NiTi SMA wires to simultaneously damp tension, compression and torsion, was developed for structural control implementation in this study. First, eight reduced-scale NiTi-wire SMA dampers were constructed. Then tension, compression and torsion experiments using the eight reduced-scale NiTi-wire SMA dampers of different specification were done. The experimental results revealed all of the eight reduced-scale NiTi-wire SMA dampers had the ability to simultaneously supply tension-compression damping and torsion damping. Finally, mechanics analysis of the NiTi-wire SMA dampers was done based on a model of the SMA-wire restoring force and on tension-compression and torsion damping analysis. The damping analytical results were found to be similar to the damping experimental results.

Vibration Characteristics and Tension Control of a Wire in WEDM (와이어 방전가공기용 와이어의 진동 특성과 장력 변동 저감을 위한 연구)

  • Chae, Ho-Jung;Lee, Seung-Yeop
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.11
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    • pp.86-92
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    • 2001
  • Vibrational characteristics and tension fluctuation of a translating wire in WEDM are the main problems to deteriorate the cutting accuracy and processing performance. In this paper, we analyze natural frequencies of the wire used in WEDM, both theoretically and experimentally. To reduce the tension variation of the wire, which directly affects cutting performance, we have designed a simply tension reduction device using springs and rollers. It is shown that tension fluctuation is reduced about 35% using the passive tension controller.

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Hybrid Control of Position/Tension for a Stringing Troy Wire (가설 트롤리선의 위치 / 장력 혼합제어)

  • Hong, Jeng-Pyo
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.6
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    • pp.932-938
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    • 2009
  • As a stringing troy wire is installed by manual operation, it is necessary to scheme the automatic system for stringing troy wire. To accomplish a task of this kind, in this paper an approach to designing controllers for the hybrid Position/Tension control of a stringing troy wire is presented. Position control system is designed based on equation of dc motor and motion equation of robot, it is controlled by feedback with a detected speed dc motor. Tension control system is designed based on equation of ac servomotor for generating torque and dynamic equation of a troy wire, it is controled by feedback with a detected tension. The control parameters is determined by simulation in independence operation of each system. To suppress a mutual interference that the disturbance occur in operating of two task at same time. Dynamic hybrid control is proposed by feed forward compensator with a disturbance accelerator and a step torque at start. The operation of proposed system is simulated and experimented, results is verified the utilities.

Characteristic of Fatigue Properties with Tension and Bending Loading Using High Strength Steel Wire (고강도 강선의 인장 및 회전굽힘 피로특성)

  • U, Byeong-Cheol;Kim, Sang-Su;Kim, Byeong-Geol;Seo, Chang-Min
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.25 no.1
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    • pp.161-167
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    • 2001
  • The overhead transmission wires operating both at warm temperature and tighten state for a long period of time in a power transmission plant are degraded by air pollution, wind, creep and slip between steel wire and aluminium conductor. The objective of this study is to investigate to investigate the characteristics of fatigue properties with tension and bending loading of a high carbon steel wire. The fatigue behaviors have been carried out by tension-tension, 4 points bending and 3 points bending loading. In the present study, a conventional fatigue strengths between 4 points bending and tension-tension fatigue were determined by Gerber, Sorderberg and Goodmans theory and we investigated S-N diagram for bending and tensile loading.

A Suggestion for Improvement of Tension Balancer in Trolly Wire System (전차 선로 자동 장력 조정 장치의 개선 방안)

  • Yim Geum-Kwang;Yoon Yong-Han
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.1328-1333
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    • 2004
  • This paper presents a suggestion for improvement of tension balancer in trolly wire system. In the overhead trolly wire systems, one of the most things is tension balancer. Because it can be automatically adjusted tension for expansion and contraction of overhead catenary system. In this paper, we introduce and suggest spring tension balancer(STB).

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Characteristic of fatigue properties with tension and bending loading using high strength steel wire (고강도 강선의 인장 및 회전굽힘 피로특성)

  • Woo, Byung-Chul;Kim, Sang-Soo;Kim, Byung-Guel;Suh, Chang-Min
    • Proceedings of the KSME Conference
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    • 2000.11a
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    • pp.274-279
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    • 2000
  • The overhead transmission wires operating both at warm temperature and tighten state for a long period of time in a power transmission plant are degraded by air pollution, wind, creep and slip between steel wire and aluminium conductor. The objective of this study is to investigate a high carbon steel wire. We tested for basic mechanical properties and 3 types fatigue behavior, tension-tension, 4 points bending and 3 points bending fatigues. In this study, a conventional fatigue strengths between 4 points bending and tension-tension fatigue were determined by Gerber, Sorderberg and Goodman's theory and we investigated S-N diagram for bending and tensile loading.

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