• Title, Summary, Keyword: 포인터 조정 장치

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A Study on Techniques for the Reduction of SRTS Jitter and Pointer Adjustment Jitter (SRTS 지터와 포인터 조정 지터의 감소 방식에 관한 연구)

  • Choi, Seung-Kuk
    • The KIPS Transactions:PartC
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    • v.10C no.4
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    • pp.455-462
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    • 2003
  • Techniques for the reduction of SRTS jitter and pointer adjustment jitter are studied. To reduce the stuffing jitter several methods have been proposed, such as bit leaking, stuff threshold modulation and sigma delta modulation. The characteristics of jitter generated in SRTS and pointer adjustment systen implementing these reduction techniques is analyzed with computer simulation. The results show that ms jitter value decreases to less than 50% as compared to a conventional pointer adjustment system. The amplitude of SRTS jitter using new techniques decreases or Increases dependent on system parameter.

A Study on Jitter Generated in STM Pointer Adjustment System (STM 포인터 조정 장치에서 발생되는 지터에 관한 연구)

  • 최승국
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.8
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    • pp.1848-1853
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    • 2003
  • Stuff threshold modulation(STM) technique is analyzed as method for reducing pointer adjustment jitter. The method for jitter reduction is described, and simulation results are presented to illustrate rms jitter performance. The results show that rms jitter value decrease to less than 50% as compared to a conventional pointer adjustment system.

A Study on Bit Leaking Pointer Adjustment litter (비트 리킹 포인터 조정 지터에 관한 연구)

  • 최승국;이기영
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.6
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    • pp.1091-1095
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    • 2004
  • Bit leaking technique is analyzed as method for reducing pointer adjustment jitter. The method for jitter reduction is described, and simulation results are represented to illustrate rms jitter performance. The results show that rms jitter value decrease to less than 25% as compared to a conventional pointer adjustment system.

Pointer Adjustment Jitter Reduction Method Using Bit Stuf fing Technique (비트 스타핑 방식을 이용한 포인터 조정 지터의 감소방법)

  • Choi Seung-Kuk
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.7
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    • pp.1196-1201
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    • 2006
  • In pointer adjustment systems, 3 byte SDH clocks are controlled for synchronization. Therefore large jitter is generated in that systems. Bit stuffing technique was introduced as method for reducing pointer adjustment jitter. However, the jitter generated in this systems is also not so small. In this paper, the problems in the bit leaking system are analyzed and new bit stuffing technique is introduced to reduce the jitter sufficiently.

A Design and Implementation of System for Presention control based on bluetooth using Mobile device with Image Processing (블루투스 기반의 모바일 장치와 영상처리를 이용한 프레젠테이션 제어 시스템 설계 및 구현)

  • Lee Seung-Keun;Kim Byung-Gook;Heu Shin
    • Proceedings of the Korean Information Science Society Conference
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    • pp.82-84
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    • 2006
  • 최근, 빔 프로젝트는 어디서든 쉽게 발견된다. 이는 강연 시나 토론 시 청중의 이해를 돕는데 아주 강력한 기능을 발휘하기 때문이다. 그러나 이것을 사용하는데 몇 가지 불편한 점이 있다. 빔 프로젝트는 모니터와 같은 출력 장치이다. 물론 입력부 없이 단독으로 기능을 발휘할 수 없다. 따라서 우리는 이를 이용할 때 컴퓨터나 노트북등을 이용한다. 하지만 이점은 사용자를 가끔 불편하게 만든다. 사용자는 발표 도중에 발표 자료를 조정하기 위해 컴퓨터로 이동해야 하고 이는 청중에게 혼돈 감을 줄 뿐 아니라 집중력을 흐트러트리는 요소가 될 수 있다. 이러한 불편함을 줄이기 위해 휴대폰과 레이저 포인터를 이용한 영상처리를 통해 프레젠테이션 시스템을 설계하고 구현하였다.

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A simulation module to practice hydraulic mechanical governors and its adjustment characteristics for stability (유압기계식 거버너의 실습용 시뮬레이션 모듈과 안정도의 조정 특성)

  • Choi, Soon-Man
    • Journal of Advanced Marine Engineering and Technology
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    • v.37 no.5
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    • pp.533-540
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    • 2013
  • Prime movers in engine rooms inherently are much affected by the adjustment of their governors for the steady state and transient properties, consequently requiring that marine engineers shall be well familiar with the way to manage governor dials for normal operation. The hydro-mechanical governors basically have different control characteristics and adjustment parameters of stability from digital governors. The former include compensation mechanism using dash pot while the control algorithm of the latter is usually based on the PID action. This study is for configuring a simulation module to let trainees practice how to adjust dials for stability on hydraulic governors in the view that the practice by real governors and engines is time consuming and high cost for operation. The governor module includes the adjusting points such as speed set, speed droop, needle valve and compensation pointer with engine module of $2^{nd}$ order coupled. The results of simulation showed satisfactory responses as a training tool for the adjustment of control parameters.