• 제목/요약/키워드: Field performance test

검색결과 2,031건 처리시간 0.029초

돌풍하중완화 풍동시험을 위한 돌풍발생장치 설계 및 지상시험 (Design and Ground Test of Gust Generator for GLA Wind Tunnel Test)

  • 이상욱;김태욱;김성찬;황인희;하철근
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계 학술대회논문집(수송기계편)
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    • pp.45-48
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    • 2005
  • Tile gust generator was designed for generating the gust field in the wind tunnel test of the scaled flexible wing model for validating gust response alleviation system. The ground operation test was performed for estimating the dynamic performance of tile gust generator before installing it in the wind tunnel for gust field measurement. The ground test results showed that the gust generator has sufficient dynamic capability to simulate the sinusoidal and random motion of the gust generator wing and thus can be used in the wind tunnel test related to gust.

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틸팅차량 성능시험 및 평가기술에 관한 연구 (A Study on Performance Test and Evaluation Technology of Tilting Vehicle)

  • 김석원;한영재;김영국;서승일;이수길;김종영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.272-274
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    • 2004
  • Test evaluation field of railroad system that safety and reliability are important is to verify basic performances of unit products and system that were producted according to the specifications. Also, it is important works that verify finally in respect to commercialize verifying reliability and safety. As one part of system technology, this field is to construct database based on know-how of accumulated technology till now than high technical idea and, is to construct test evaluation system of railroad system that can utilize the constructed database. According to the necessity, our researchers investigated good measuring system of foreign country and performed research on performance test and evaluation technology of high-speed tilting vehicle that suits to domestic state.

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공동주택 중량바닥충격음 현장측정을 통한 차단성능 평가방법의 비교검토 연구 (A Study of Rating Method Comparison for Heavy-weight Floor Impact Sound based on the Field Test Data in Apartment Houses)

  • 신훈;백건종;국찬;송민정;김선우
    • KIEAE Journal
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    • 제10권5호
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    • pp.187-194
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    • 2010
  • Heavy-weight floor impact sound insulation performance criteria have been effective in Korea since the regulation which enforces the standard thickness of slabs in domestic apartment houses should be constructed by 180mm or 210mm was adopted. But every slab does not satisfy this criteria. So, review on existing floor impact sound insulation performance is needed to propose some basic materials for the revision of rating method. To achieve this goal, 63 field test data were checked and analyzed. The results of this study are as follows ; 1) The 210mm thickness slab has the characteristics of deeper level decrease above 120Hz frequency band than that of 180mm thickness slab's. 2) 27.5% of 180mm thickness slabs were satisfied the floor impact sound insulation performance criteria, whereas 65% of 210mm slabs do. 3) Among the main contribution frequency bands for the determination of single rating index, 63Hz was shown as the most contributive band in 210mm slabs. 4) In comparison of single rating index between bang machine test and ball test. there is a big difference between the two and this phenomenon is frequent in 210mm slab results. 5) Rating Methods for the analysis of cross-correlation between the amount of rating, the usefulness of the arithmetic mean could be secured.

파종기용 파종 감시 장치 개발 (Development of A Seeder Monitoring System)

  • 김경욱
    • 한국농업기계학회:학술대회논문집
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    • 한국농업기계학회 1996년도 학술발표대회 논문집
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    • pp.1-6
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    • 1996
  • A seeder monitoring system was developed to remove the uneasiness of mis-sowing that drop operations efficiency at sowing-work and to make reliable and stable work. The objectives of this study are to investigate that the system developed is applicable to sowing soybean seeds and scattering fertilizer and to evaluate performance of the system developed through the indoor test and the indoor test and the field test before it is propelled to put the system developed to practical use.

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Performance Analysis of Grid-Connected PCS for PV System by Field Demonstration Test

  • So J.H.;Jung Y.S.;Yu G.J.;Jung M.W.;Kang G.H.;Choi J.Y.
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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    • pp.516-519
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    • 2003
  • 3kW photovoltaic (PV) systems and data acquisition system are constructed for performance analysis of PV system at field demonstration test center (FDTC) of Korea. As climatic and irradiation conditions are varied, the performance characteristics of PV system are collected and analyzed in data acquisition system. From these results, the performances of gird-connected power conditioning system (PCS) fur PV system have been evaluated and analyzed. Furthermore, performance indices of grid-connected PCS e.g. output power, efficiency, loss factor, and the other index at the site are reviewed.

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트랙터용 습지 보조 차륜의 설계(I)-케이지 휠의 설계 변수에 관한 연구 (Design of A Tire-Attachable Cage Wheel for Wetland Use (I)-Study on design parameters of a cage wheel-)

  • 오영근;류일훈;김경욱
    • Journal of Biosystems Engineering
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    • 제25권2호
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    • pp.79-88
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    • 2000
  • Effects on tractive performance of design parameters of cage wheel as a traction aid to driving tires of tractor in wet paddy field were investigated experimentally. an experimental cage wheel was designed so that the design parameters such as wheel diameter, wheel width, lug pitch and lug angle could be varied during traction test, The traction test was conducted in two different types of wet paddy field ; shallow and deep harpan fields . Experimental results showed that tractive performance is affected by both soil conditions and the design parameters. A considerable improvement on the tractive performance was obtained by using a cage wheel with 45$^{\circ}$ lug angle in shallow hardpan and smaller lug pitch in deep hardpan. The diameter of cage wheel was mostly influential to the tractive performance both in shallow and deep hardpans.

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대형 전기온풍기 정상상태 열적성능의 현장시험에 관한 연구 (A Field Test on the Steady State Thermal Performance for the Forced Convection of Large Size Electric Air Heater)

  • 최창용;김홍건
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2002년도 추계학술대회 논문집
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    • pp.99-103
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    • 2002
  • A field test was peformed to estimate the thermal performance of the forced convection electric air heater by the experiment. Air temperature, flow rate and electrical power input were measured with the related measurement sensors, and acquisition methods for the measured data were studied to effectively estimate the thermal performance of the tested air heater. To determine the mean air temperature at the flow cross-section, measuring positions were chosen by considering the flow velocity profile and the equally divided cross-sectional area. From the experimental results, thermal efficiency is obtained as an indication of the tested electric air heater performance.

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경암반에서 TBM 굴진 해석 및 평가 (Analysis and Assessment of Tunnel Boring Machine Performance in Hard Rock)

  • 배규진;이용수;홍성완;박홍조
    • 터널과지하공간
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    • 제4권2호
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    • pp.144-155
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    • 1994
  • This research is designed to assess current achievement levels for mechanized excavation systems in Korea adn suggest the model predictive of TBM performance using statistical approaches. A test section in the TBM construction sites is selected to measure and analyze TBM performance. The field records including operating data, time allocation into downtime catagories, and machine design are analyzed on a shift basis. There are a total of 240 shifts, with most days operating two shifts per day. Examples of the probability density functions produced from the test section are presented and discussed. Relationships between TBM penetration rate and rock physical properties are investigated and the empirical equations for TBM performance prediction are also assessed with the field data.

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지상파 DTV 현장측정 결과분석 (Analysis of Terrestrial DTV Field Test Results)

  • 조진호;김종호;권오형;김태균
    • 한국방송∙미디어공학회:학술대회논문집
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    • 한국방송공학회 1999년도 학술대회
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    • pp.155-159
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    • 1999
  • This paper represents analysis of terrestrial DTV field test results over Taejon city area. Thirty three points were selected as measuring points. Signal power, noise power, Segment Error Rate (SER) and equalizer performance was measured. DTV video & audio quality was good over half of test sites. Equalizer could correct signal ghost and improve S/N up to 13.7dB.

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뇌졸중 환자의 시지각 능력이 운전수행에 미치는 영향 (Effects of Visual Perception Skills on Driving Performance of Patients With Stroke)

  • 곽호성
    • 재활치료과학
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    • 제9권1호
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    • pp.45-55
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    • 2020
  • 목적 : 본 연구의 목적은 국내에 거주하는 뇌졸중 환자를 대상으로 시지각 능력이 운전수행에 미치는 영향을 알아보고 운전수행능력 향상을 위한 시지각 훈련의 중요성을 제시하고자 하였다. 연구 방법 : 2014년 10월부터 11월까지 서울시 소재 병원에 입원중인 뇌졸중 환자 19명을 대상으로 MVPT(Motor-free Visual Perception Test), TMT A&B(Trail Making Test A & B), UFOV(Useful Field Of View test)를 사용하여 시지각능력 검사를 실시하였으며, 가상현실 운전시뮬레이터를 이용하여 운전수행능력을 검사하였다. 결과 : 뇌졸중 환자의 운전수행은 다양한 시지각 능력 평가도구와 관련성이 있었으며, UFOV 하위검사 2, TMT B, MVPT에서 가장 높은 상관관계가 나타났다. 또한, 시지각 능력 평가결과는 운전시뮬레이터 평가결과(합격/불합격)를 민감도 100.0%, 특이도 80.0%, 정확도 89.5%로 판별할 수 있었다. 결론 : 뇌졸중 환자의 운전수행에 있어 시지각 능력이 운전수행능력과 매우 높은 관련성이 있는 것으로 나타났다. 본 연구를 통해 운전 재활 분야에서 시지각 능력과 관련된 운전재활 및 운전수행능력 평가를 시행하는데 유용하게 사용될 것으로 기대한다.