• 제목/요약/키워드: RAGE

검색결과 252건 처리시간 0.022초

비접촉 평면 구동기의 자기력 조합 방식 구동 원리 (A Study on the Driving Principles of a Novel Non-contact Surface Actuator Using Combination of Magnetic Force)

  • 정광석;백윤수
    • 한국정밀공학회지
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    • 제18권3호
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    • pp.115-121
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    • 2001
  • In micro automation technology, the concurrent realization of a high resolution and a large operating rage has been achieved by a dual actuator, usually called by piggy-back system, conventionally. But, because of its manufacturing cost, the complexity of control, and the limit of overall bandwidth, the contract-free and single servo actuators have been suggested with specific applications. In this paper, we suggest a novel non-contact surface actuator suing combination of the Lorentz force and the magnetized force, and discuss the actuating principles including an analytical approach. Differently from the existing planar system, an operating range of the suggested system can be expanded by an additional attachment of active elements. Therefore, it is estimated to be suitable for the next-generation moving system.

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한국 제조업체의 중국시장 진입유형 선택 결정요인에 관한 연구 (A Study on Selection Determinant Factor in the China Market Entry of Korean Manufacture Firms)

  • 이제홍
    • 통상정보연구
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    • 제10권4호
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    • pp.417-437
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    • 2008
  • Korean firms have had a short history of foreign direct investment and export in China market entry. This present study empirically analyzed determinants of the choice of foreign market entry modes, Particularly forcusing on the China market entry on Korean manufacture firms. This study developed a research model to determinant factor in the China market entry and collected 77 survey responses from the Korean manufacture firms. This study model construct in the third factor, China market character, company character and product character. In China market character, the variance are China trade barrier, culture different, competition power. The variance in company character are internationalization experience, enterprise rage and entry motivation. Also the variance in product character are product different, customer service and cost advantage. It is researcher's main interest that which type of China market entry format brought most positive evaluation form the Korean manufacture firms. therefor, these research results turned out to be different a little both export and direct investment in China market of Korean manufacture firms.

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LQG/LTR 설계방법을 이용한 자동차 현가장치 능동제어 (Automotive Active Suspension Design Using LQG/LTR Method)

  • 황재혁;박봉철;백승호
    • 소음진동
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    • 제3권4호
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    • pp.383-394
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    • 1993
  • An automotive suspension system generally behaves like a low frequency band-pass filter(0.5 - 10 Hz). Passengers are very sensitive to this frequency range in terms of ride quality and road holding ability. In this paper, a LQG/ LTR controller is suggested to improve the ride quality and road holding ability in the specified frequency rage. It has been found by numerical simulation that the ride quality and road holding ability can be improved in the frequency ranges of 0.5 - 3.0 Hz and 0.3 - 2.1 Hz respectively. In addition, a new approach using root locus to evaluate the stability robustness of the active suspension system is studied. It is shown that the stability robustness of the LQG/LTR controller designed in this paper is improved, compared to the passive system.

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Ni-Cr-Mo-V강의 템퍼링에 의한 미세구조 변화와 하한계 피로균열진전 특성 (Microstructual Change and Near-threshold Fatigue Crack Growth Behaviors of Ni-Cr-Mo-V Steel by Tempering Treatments)

  • 신훈;문윤배;김상태;권재도
    • 열처리공학회지
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    • 제10권4호
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    • pp.266-277
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    • 1997
  • Near-threshold fatigue crack growth characteristics was investigated on the Ni-Cr-Mo-V low alloy steel, which has the different microstructure obtained by tempering at various temperature. The specimens were austenized at $950^{\circ}C$ and then followed by tempering at $200^{\circ}C$, $530^{\circ}C$ and $600^{\circ}C$. Strain rate was obtained from strain gauge attached on the crack tip and crack opening point was observed through load-strain curve. Threshold stress intensity range(${\Delta}K_{th}$) was increased with increasing tempering tempuerature, but the effective threshold stress intensity rage (${\Delta}K_{eff,\;th}$) was not affected with the increasing temperature. Grain size increased with increasing tempering temperature.

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금속재료 변형률속도 경화의 미시적 관찰 (Microscopic Investigation of the Strain Rate Hardening for Metals)

  • 윤종헌;허훈;허무영;강형구;박찬경;서주형;강주석
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2007년도 추계학술대회 논문집
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    • pp.352-355
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    • 2007
  • Polycrystalline materials such as steels(BCC) and aluminum alloys(FCC) show the strain hardening and the strain rate hardening during the plastic deformation. The strain hardening is induced by deformation resistance of dislocation glide on some crystallographic systems and increase of the dislocation density on grain boundaries or inner grain. However, the phenomenon of the strain rate hardening is not demonstrated distinctly. In this paper, tensile tests for various strain rates are performed in the rage of $10^{-2}$ to $10^2s^{-1}$ then, specimens are extracted on the same strain position to investigate the microscopic behavior of deformed materials. The extracted specimen is investigated by using the electron backscattered diffraction(EBSD) and transmission electron microscopy(TEM) results which contain grain size, grain shape, aspect ratio and dislocation substructure.

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VoiceXML을 이용한 음성 인식시스템에서의 ASP 모듈 연구 (A Study On The ASP Module Using VoiceMXL in Automatic Speech Recognition System)

  • 장준식;김민석;윤재석
    • 한국정보통신학회:학술대회논문집
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    • 한국해양정보통신학회 2001년도 추계종합학술대회
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    • pp.609-612
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    • 2001
  • 본 연구에서는 VoiceXML의 용이한 확장성과 GSL(Grammar Specific Language)을 사용하여 사람이 말하는 자연어를 컴퓨터가 잘 이해할 수 있게 기호화 하고 이를 컴퓨터가 어떻게 인식하는가에 대해 다루어 보았다. 그리고 Voice Portal 항공정보시스템을 구축하여 사용자가 원하는 정보를 들려 줄 수 있게 하기 위한 ASP(Active Server rage)모듈을 작성하여 Voice Portal 항공정보시스템상에서 그 효율성을 실험하여 보았다.

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초등학교 시설의 친환경 색채계획에 관한 연구 (A Study on the Eco-exterior Color Scheme for Elementary Schools)

  • 최성애;한기원
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2004년도 추계학술발표대회 논문집
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    • pp.36-39
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    • 2004
  • The purpose of this study is to extract the rage on exterior colors of Elementary schools in harmony with natural colors as the colors of sky and trees, of Which the colors is basically composing the natural environment. The theory of harmony in NCS relatively expressing the changed colors according to the color stimulation condition is the contrast of same color fit for the nature. NCS has a systematic open mind considering parts in the whole. The study suggests appropriate strategy for Eco-color scheme. The result shows that it's desirable to select YR Group in the elementray school of exterior color design, The Eco color planned by NCS is expected to clarify the interrelationship between children and environment. This practical use should be continuingly tried in the color design of interior for elementary schools.

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CONSTRAINED DEFUZZIFICATION

  • Yager, Ronald R.;Filev, Dimitar P.
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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    • pp.1167-1170
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    • 1993
  • We look at the problem of defuzzification in situations in which in addition to the usual fuzzy output of the controller there exists some ancillary restriction on the allowable defuzzified values. We provide two basic approaches to address this problem. In the first approach we enforce the restriction by selecting the defuzzified value through a random experiment in which the values which have nonzero probabilities are in the allowable region, this method is based on the RAGE defuzzification procedure and makes use of a nonmonotonic conjunction operator. The second approach which in the spirit of the commonly used methods, a kind of expected value, converts the problem to a constraint optimization problem.

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국내 레미콘의 권역별 배합특성에 관한 분석 - 경기 및 경상권역을 중심으로 - (Analysis of the Mixing Conditions by Domestic Ready-Mixed Concrete Rage Sphere)

  • 서휘완;김영일;강창운;한천구
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
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    • pp.131-132
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    • 2011
  • This study analyzes the yearly-best delivered size range of truck mixer based on the specified mix, Water to Binder Ratio, aggregate proportion and unit amount with statistical method targeting on Kyeongi and Kyeongsang province and compares with the similar materials of Japan to propose as a basic standard for the quality control of mixer truck. As a result, in case of the Water to Binder Ratio of these areas, it is higher than Japan's due to the excessive safety rate reflecting the changes of differential value impact and unit amount, and the unit amount's standard deviation is very large by reflecting the changes of the amount used and chemical admixture susceptibility. In case of aggregate proportion, the frequency rate is about 50%, which is very similar value with Japan's one.

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펄스방전을 사용한 이중베리어방전 반응기에 있어서 NOx 제거에 관한 연구 (A study on NOx removal in double barrier discharge reactor using pulse power supply)

  • 김동욱;김응복;정영식
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1999년도 추계학술대회 논문집
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    • pp.169-172
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    • 1999
  • In this experimental study we Proposed the double dielectric barrier discharge (DDBD) reactor to produce as high an electric field as possible. The experiment are conducted for applied voltage from 15 to 20[tV], flow gas rage at 2[1/min] and pulse rate at 120[pulses/s] and 240[pulses/s]. SPD connection of DDBD which combine the surface discharge with the silence discharge was most effective to reduce the NOx. In the decomposition efficiency per watt, the low pulse rate gave hotter efficiency than that of the high pulse rate. However in DeNOx rate, the high pulse rate gave better performance than that of the low pulse rate. NOx removal rate increased with increasing the applied voltage in all reactors.

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