• 제목/요약/키워드: system test

검색결과 26,692건 처리시간 0.052초

액체추진기관 대형시험설비 기술동향 (Technical Review of Heavy Test Facilities of Liquid Rocket Propulsion System)

  • 유병일;김지훈;오승협
    • 한국추진공학회:학술대회논문집
    • /
    • 한국추진공학회 2010년도 제35회 추계학술대회논문집
    • /
    • pp.814-815
    • /
    • 2010
  • 한국항공우주연구원에서는 한국형발사체 개발사업의 일환으로 KSLV-II 발사체의 추진기관 성능시험을 위한 연소기, 엔진 등 대형 추진기관 시험설비를 구축 및 운영 예정에 있다. 이에 앞서 해외 기술 선진국에서의 과거 발사체 개발에 적용하였던 대형시험설비에 대한 사례를 조사 및 검토함으로써 향후 국내 실정에 적합한 한국형발사체 시험설비 개발 계획에 참고하고자 한다.

  • PDF

철도차량의 승차감-진동 평가 시스템 개발 (Development of an Evaluation System For Ride Comfort and Vibration On Railway Vehicles)

  • 이창환;이재근;윤성식;유완석
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2003년도 춘계학술대회 논문집
    • /
    • pp.747-754
    • /
    • 2003
  • In this paper, a new evaluation system was developed for ride comfort test and vibration level test on railway vehicles. Combining two tests carried out by different test equipment seperately before, the developed system is capable of ride comfort test and vibration test by one system. Also, the assessment algorithm of ride comfort and vibration was compared and verified by simulation results with VAMPIRE software. With the developed system, the comfort in a passenger coach and the vibration in a freight car were evaluated through field test.

  • PDF

4kW급 상용차량용 전력전자 냉방장치의 열 환경 성능평가 (Thermal environmental performance evaluation of 4kW power electronic cooling system for commercial vehicle)

  • 한근우;김성곤;이충훈;최명현;정영국
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2017년도 전력전자학술대회
    • /
    • pp.290-291
    • /
    • 2017
  • This study deals with an evaluation method for testing the robustness of the 4 kW commercial power electronic cooling system to the thermal environment. The power electronic cooling system consists of a cascaded push-pull DC / DC converter, a three-phase DC / AC inverter, and an electric compressor. The system manufactured by the thermal environment evaluation test (heat distribution test, thermal impact test, high temperature operation test, temperature cycle test, low temperature operation test) for the commercial electric power cooling system for commercial vehicle proves that it is robust against thermal environment.

  • PDF

Designing Test Methods for IT-Enabled Energy Storage System to Evaluate Energy Dynamics

  • Kim, Young Gon;Kim, Dong Hoon;Lee, Eun-Kyu
    • Journal of Information Processing Systems
    • /
    • 제13권6호
    • /
    • pp.1487-1495
    • /
    • 2017
  • With increasing interests in renewables, more consumers are installing an energy storage system (ESS) in their backyards, and thus, the ESS will play a critical role in the emerging smart grid. Due to mechanical properties, however its operational dynamics must be well understood before connecting the ESS to the smart grid (and eventually to an IT system). To this end, we investigate charging and discharging processes in detail. This paper, then, proposes methods for four type tests (state of charge test, conversion efficiency test, response time test, and ramp rate test) that can assess the dynamics of the ESS. The proposed methods can capture accurate delay values of mechanical processes in the ESS, and it is expected for those values to help design real-time communication systems in the smart grid involving the ESS.

고속전철용 보조전원장치 시스템 조합시험 (Combined test of Power Supply System for Korean High Speed Train)

  • 조현욱;김연충;김태환;장경현;김철호
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2008년도 추계학술대회 논문집
    • /
    • pp.619-625
    • /
    • 2008
  • Electrical Power supply System conditions of korea high speed train consists of main transformer, four AC-DC PWM converter of Auxiliary Block, Battery Charger in Power Car and Trailer Car, Trailer Inverter, Auxiliary inverter. Main transformer, at nominal voltage of 25kv supplied to secondary winding nominal output Voltage 383Vac, The Auxiliary block consists of AC-DC converters for generating 670VDC power, Auxiliary inverters for ventilation and air compressor, Trailer car inverter provide three phase power supplies at 440Vac for air conditioning and heating. The Battery charger Trailer and Power car supplies 72VDC all necessary equipment to energize the trainset equipment and suppy essential control. This Paper introduces the combined test results of the power supply system for korea high speed train. The main purpose of this combined test is to verify the performance of the power supply system that is designed to operate up to full load test.

  • PDF

진단용 방사선발생장치의 검사기준을 적용한 동물병원의 방사선 안전관리 (The Radiation Safety Management in the Animal Hospital Using Inspection Standard of Diagnosis Radiation System)

  • 김상우;임재동;한동균;성열훈
    • 대한안전경영과학회지
    • /
    • 제12권4호
    • /
    • pp.73-80
    • /
    • 2010
  • The purpose of this study was to investigate the actual conditions of radiation safety supervision in animal clinics using inspection standard of X-ray generator for diagnosis. The surveys for inspection standard system, equipment condition, and safety supervision were carried out in 18 animal clinics randomly. The inspection standard included reproducibility of dose exposure, kVp, mAs, collimator accuracy test, collimator luminance test, X-ray view box luminance test, grounding system equipment test and external leakage current test. The surveys of equipment condition and safety supervision used one-on-one interview with 5 points measurement. As a result, 44.44% of reproducibility of dose exposure was proper, 81.25% of kVp test was good, and 100% of mAs test was appropriate. Also, 66.66% of collimator accuracy test was proper, 61.11% of collimator luminance test was good, 53.13% of X-ray view box luminance test was suitable. In addition, only 5.55% of grounding system equipment and ground resistance was proper, 63.64% of external leakage current test was appropriate in grounding system equipment test. The 100mA electric capacity of X-ray generator for diagnosis was popular with 44.44%, and its 55.56% was purchased used equipment. Monthly average of less than 50 times (61.11%) was top frequency in use, and no animal clinic had a thermo-luminescence dosimeter(TLD). The 16 animal clinics with radiation safety zone and 2 without radiation safety zone were appeared.

선로변 시설물 차상제어를 위한 차상중심 열차제어시스템의 통신 연속성 시험 (Communication Consecutive Test of Train Oriented Control System for Wayside Equipment Control)

  • 백종현
    • 전기학회논문지
    • /
    • 제63권5호
    • /
    • pp.703-712
    • /
    • 2014
  • To improve the efficiency and safety of railway systems, the train control system has been considerably evolved from the ground-equipment-based control system (e.g. track circuit, interlocking system, etc.) into the on-board-equipment-based control system. In addition, this train control system enables the rolling stock to intelligently control the trackside facilities by introducing the information and communication technologies (ICT). Accordingly, since the ICT-based train control system makes the railway system be simplified (i.e. the heavy ground-equipment can be removed), the efficient and cost-effective railway system can be realized. In this paper, we perform the feasibility test of the ICT-based train control system via a simulation. To this end, we have developed the prototypes of the on-board controller and wayside object control units which control the point and crossing gate and performed the integrated operation simulation in a testbed. In this paper, before the field test of the on-board-controller-based train control system, we perform the Consecutive operation test for prototypes of the on-board controller, wayside object control units and local control computer.

KSLV-I 킥모터 개발을 위한 고공환경모사시험용 추력측정장치 (Thrust Measurement System for High Altitude Simulation Test of the KSLV-I Kick Motor)

  • 이정호;조상연;조기주;정동호;이한주;오승협;윤경렬;김동철
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2008년도 춘계학술대회논문집
    • /
    • pp.428-431
    • /
    • 2008
  • Korea Aerospace Research Institute(KARI) is achieving the Korea Space Launch Vehicle(KSLV) program according to National Space Technology Development Program. KSLV-I will be composed to liquid propellant(first stage) and solid propellant(second stage) propulsion system. The propulsion system of KSLV-I second stage is solid kick motor with high expansion ratio and its starting altitude is 300km high. In order to verify the performance of upper stage propulsion system designed to operate in the upper atmosphere, test facility which can simulate high altitude is needed. High Altitude Simulation Test Facility is composed to Thrust Measurement System, Control & Measurement system, Diffuser, SKID for cooling water supply to diffuser, CCTV, fire protection system and so on. This paper introduces TMS adapted to High Altitude Simulation Test for KSLV-I Kick Motor Development and results of hot firing test for its performance verification.

  • PDF

내장형 시스템의 상호작용 오류 감지를 위한 테스트 데이타 선정 기법 (Test Data Selection Technique to Detect Interaction Faults in Embedded System)

  • 성아영;최병주
    • 한국정보과학회논문지:소프트웨어및응용
    • /
    • 제30권12호
    • /
    • pp.1149-1157
    • /
    • 2003
  • 하드웨어와 소프트웨어가 조합된 내장형 시스템이 복잡해지면서, 내장형 시스템에 탑재되는 내장형 소프트웨어 테스트가 중요하게 인식되고 있다. 특히, 원자력 발전소와 같이 안전 등급이 높은 시스템에 들어가는 소프트웨어 테스트는 필수적이다. 내장형 시스템 테스트의 경우 하드웨어와 소프트웨어의 상호작용에 의해 발생하는 오류를 발견하기 위한 효과적인 테스트 기법이 필요하다. 본 논문에서는, 하드웨어와 소프트웨어 사이의 상호작용에 의해 생성되는 오류를 발견하기 위하여, 오류 삽입 기법을 이용한 테스트 데이타 선정 기법을 제안하고, 이 기법을 Digital Plant Protection System에 적용하였으며, 실험을 통해 제안한 기법의 우수성을 분석한다.

소형콘관입시험(Miniature Cone Penetration Test)의 국내현장 적용 (The Field Application of Miniature Cone Penetration Test System in Korea)

  • 윤성수;지완구;김준오;김래현
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2009년도 춘계 학술발표회
    • /
    • pp.349-360
    • /
    • 2009
  • The cone penetration test(CPT) has gained its popularity in site characterization indebted by its reliability, speed, economy, and automatic measurement system since its development in the 1930s. The CPT results, commonly consisting of cone tip resistance, sleeve friction, and pore water pressure measurements, allow us to classify soils as well as to reveal their engineering characteristics. The site condition at which the CPT is allowable is often dependent on the capacity of a CPT system. In Korea, it has been considered that the CPT could be appled only to soft soils in most cases because CPT systems available for stiff soils are very rare due to their expensive procurement and maintenance cost. Luoisiana Transportation Research Center(LTRC) has developed and implemented a field-rugged continuous intrusion miniature cone penetration test(CIMCPT) system since the late 1990s. The miniature cone penetrometer has a sectional cone area of $2cm^2$ allowing system capacity reduction compared to the standard $10cm^2$ cone penetrometer. The continuous intrusion mechanism allows fast and economic site investigation. Samsung Engineering & Construction has recently developed and implemented a similar CIMCPT system based on its original version developed in LTRC. The performance of the Samsung CIMCPT system has been investigated by calibration with the standard CPT system at a well-characterized test site in Pusan, Korea. In addition, scale effect between the miniature cone penetrometer and the standard cone penetrometer has been investigated by comparing the field test results using the both systems.

  • PDF