• Title/Summary/Keyword: Running test

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A Study on Temperature Characteristics for Traction Motor of High Speed Railway (고속철도차량 전동기의 열적 특성 연구)

  • Han, Young-Jae;Kim, Seog-Won;Kim, Sang-Soo;Kim, Ki-Hwan;Koo, Hun-Mo;Choi, Jung-Sun;Kim, Jung-Su
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.19 no.12
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    • pp.1123-1127
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    • 2006
  • There are various elements that have influence on safety and reliability of high speed railway. Among them, mechanical characteristics of traction motors are very important. Therefore, we verified that temperature characteristics have influence on damage and durability of these parts. We designed a measurement system for temperature test, and could measure the temperature of each device by the system. As the result of temperature test, we could confirm that the traction motors on Korean High-Speed Train satisfy the criteria. From this test, we get information of the traction motor about the temperature characteristic during running speed and running time.

Test and evaluation on the suitability of operating high speed train in electrified conventional line through test run of HSR-350x (한국형 고속열차를 활용한 기존선 전철화 구간에서 고속열차 운행의 적합성 평가)

  • Mok, Jin-Yong;Kim, Young-Guk;Kim, Ki-Hwan;Cho, Min-Young
    • Proceedings of the KSR Conference
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    • 2007.11a
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    • pp.229-235
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    • 2007
  • The KTX, which have opened the revenue service in April 2004, is operating in Kyoung-Bu high-speed line and electrified conventional Ho-Nam line, and the more the electrification are enlarged, the more the requirement of operating of high speed train would be increased. In this paper, the result of test run and evaluation on the suitability of operating high speed train in electrified conventional line between Dae-jeon and East Dae-gu was reviewed. Evaluation and analysis was executed in specific categories, such as operation & running performance of the train considering vibration characteristics based on UIC 518, ride comfort and current collection, and response sensitivity of ATS device for signalling from track facility. The result of this running test was evaluated and considered as a good practice for revenue operation of high speed train in electrified conventional line between Dae-jeon and Dae-gu.

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Experimental Study on the Hydrodynamic Forces of 30 Feet Sailing Yacht (30피트급 요트의 유체력에 대한 실험적 연구)

  • Yoo, Jae-Hoon;Ahn, Hae-Seong
    • Journal of the Society of Naval Architects of Korea
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    • v.42 no.3
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    • pp.233-240
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    • 2005
  • A model test was carried out, in order to verify the hydrodynamic performances of public 30 feet class sailing yacht. In the initial design stage, the performances and the running attitude of sail yacht including the hull form and sail plan, appendages were estimated by VPP, from which made the representative test conditions. A new experiment system such as captive model device was composed because the running attitude could be changed by wind conditions. The test results show that the minimum resistance is generated in the heeling 20 degree, which was expected in the initial design stage. It is thought to be the useful informations that the keel has au effects on hydrodynamic forces and resistance differences between the upwind and the downwind condition.

A Study of PSs Modeling of Ulchin N/P #1 by AVR Step Test (AVR 스템시험에 의한 울진 N/P 1호기 PSS 모델링 연구)

  • 김동준;문영환;전동훈;김태균
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.50 no.8
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    • pp.351-358
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    • 2001
  • This paper deals with the PSS modeling of Ulchin N/P #1 as well as the generator and excitation system modeling by utilizing the recorded data from AVR step test, which has been performed by entering small voltage signal into the AVR summing point. In addition to it. two recorded results obtained from the AVR step test with PSS sunning and without PSS running have not only been compared each other on the time domain, but also they heve been analyzed with FFT analysis on the frequency domain; thus, the desirable effects of running PSS in Ulchin N/P #1 on power system have been explicitly confirmed. Finally, the derived PSS model parameters lead to good matches between simulation results and recorded data.

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Running Bucket Vibration Test of Steam Turbines (증기 터빈 버켓의 회전 진동 시험)

  • 박종포;신언탁;김호종
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1997.10a
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    • pp.96-100
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    • 1997
  • A design modification was made on the 9-th stage wheel dovetail of a high-intermodiate pressure (HIP) turbine rotor for a fossil power plant that necessitates the use of new long-shank buckets for the row. A bucket vibration test is necessary to verify that the new 9-th stage buckets have adequate frequency margin from a nozzle passing frequency when running at speed. A finite element analysis (FEA) has been performed using a commercial S/W to approximately estimate bucket natural frequencies, and thus to help the vibration test. A row of the new buckets has been assembled on the HIP rotor for the vibration tests using dynamic balancing facilities. The tests have been done during deceleration run with air excitation. The test results are compared with the calculation using our empirical formula, and show that the modified design meets the frequency-margin requirements.

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Conformance Evaluation Method by Successively Applying Self-Running Test Mode in Active RFID Tag (능동형 RFID 태그에서 자체 시험 모드를 순차적으로 적용한 적합성 평가방법)

  • Song, Tae-Seung;Kim, Tae-Yeon;Lyou, Joon
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.45 no.6
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    • pp.204-212
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    • 2008
  • Active RFID tags are currently used in harbor transportation; they are attached to cargo containers for sea transportation. They are designed to be able to be identified by RFID readers installed at ports in many countries. The international standard ISO/IEC 18047-7 regarding RFID conformance test methods suggests the use of air interface evaluation between an RFID reader and a tag. However, the test method suggested by the international standard is intended to detect a radio signal over only a very short period. Outcomes were uncertain, making it difficult to evaluate the system accurately. This paper proposes a new evaluation method by incorporating a 'self-running test mode' environment into the RFID tags in order to reduce the test time and increase testing accuracy. We found that the application of the suggested method to actual tags improves measurement time and uncertainty over that obtained using existing methods.

A Study on the Resistance Test Method for Planning Hull Model using the High Speed Towing Carriage (무인고속전차를 이용한 활주선 모형의 저항시험 기법 연구)

  • Lee, Young-Gill;Ha, Yoon-Jin;Jeong, Kwang-Leol;Chae, Soon-Jae
    • Journal of the Society of Naval Architects of Korea
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    • v.51 no.5
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    • pp.349-355
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    • 2014
  • The resistance test of a high speed craft such as planing ship is performed with a high speed towing carriage instead of ordinary towing carriage because of the speed limitation. In the resistance test using high speed towing carriage, the model ship is fixed to the carriage to restrain the running attitude for enough measuring time. Such method is called fixed model test method. In the fixed model test method, to get the appropriate running attitude, the model test is iteratively repeated until the trim moment and lift force are close to zero. In this research, trim free model test method is investigated to reduce the number of iteration. And, the limitation of towing speed range in the trim free model test method is investigated.

Planar Motion Mechanism Test of the Mobile Harbor Running in Design Speed in Circulating Water Channel

  • Yoon, Hyeon-Kyu;Kang, Joo-Nyun
    • Journal of Navigation and Port Research
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    • v.34 no.7
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    • pp.525-532
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    • 2010
  • Mobile Harbor (MH) is a new transportation platform that can load and unload containers onto and from very large container ships at sea. It could navigate near harbors where several vessels run, or it could navigate through very narrow channels. In the conceptual design phase when the candidate design changes frequently according to the various performance requirements, it is very expensive and time-consuming to carry out model tests using a large model in a large towing tank and a free-running model test in a large maneuvering basin. In this paper, a new Planar Motion Mechanism(PMM) test in a Circulating Water Channel (CWC) was conducted in order to determine the hydrodynamic coefficients of the MH. To do this, PMM devices including three-component load cells and inertia tare device were designed and manufactured, and various tests of the MH such as static drift test, pure sway test, pure yaw test, and drift-and-yaw combined test were carried out. Using those coefficients, course-keeping stability was analyzed. In addition, the PMM tests results carried out for the same KCS (KRISO container ship) were compared with our results in order to confirm the test validity.

Assessment of the Running Resistance of a High-speed Train Using a Coasting Test (타행 시험을 이용한 고속열차 주행저항 평가)

  • Kwon, Hyeok-Bin;Kim, Seogwon;Oh, Hyuck Keun
    • Journal of the Korean Society for Railway
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    • v.17 no.3
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    • pp.165-170
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    • 2014
  • The resistance to motion of the Korean next-generation high-speed train (HEUM-430X) was assessed on the basis of 12 coasting test runs at coasting speeds up to approximately 380km/h. Two different methods, a linear regression method and a time-integral method, were employed to calculate decelerations from the time-velocity data and the time-distance data, respectively, and an equation of resistance to motion was devised from the deceleration data calculated at each time section. The effect of an improvement of the aerodynamic shape on the resistance to motion was investigated, with the results showing that the running resistance was reduced by about 15% due to these improvements. An increase of approximately 28% of the running resistance was also noted when running in a tunnel relative to running through an open field.

A Study on the Effect of Hull Appendages of High-Speed Catamarans with Modified-reverse bow on the Running Performance (반전형 선수부 형상을 갖는 고속 쌍동선의 부가물이 주행성능에 미치는 영향에 관한 연구)

  • Kim, Do-jung;Na, Hyun-ho;Kim, Jung-eun;Oh, Do-won;Choi, Hong-sik
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.25 no.5
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    • pp.601-608
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    • 2019
  • In this study, the effect of hull appendages on the high-speed catamarans with reverse bow shapes is compared and analyzed by numerical analysis and circulating water tank model test. The reverse bow shape showed an improved wave shape by shifting the generation position of forward divergent wave to the stern direction and was effective in resistance and stable running posture (Kim et al., 2019). In the model test results of the running performance as the wave patterns and the change of the running posture due to the fin fitted with the inner side of the inverted bow and the interceptor, 1) Trim characteristics of the inverted bow 2) Improvement of superposition of inner wave by Fin 3) The trim control by the fin and the interceptor is considered to be effective in reducing the impact of the two hull connection decks (wetdeck).