• Title/Summary/Keyword: Load Test System

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The development and implementation of airconditioner control system for peak load clipping (하계 피크전력 감소를 위한 냉방기제어시스템 개발 및 적용)

  • 문홍석;조선구;이원빈
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.783-787
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    • 1996
  • The rapid growth of air conditioning load has become a main reason of peak load increase in summer. In connection with this, we surveyed the load management projects of utilities world wide and their detailed activities. This study is to develop a remote load control system using computer and radio communications. We finished the field-test of this system on August 1995 in Seoul area. During the field-test, the remote load control of air conditioners was proved to be well-timed. Two control modes, group control and all control, are available for the user to select. The transmission reliability of the load control signal was very good and the functions of system hardware as well as the software were excellent. So we confirmed the applicability of the load control system including the pager communication network. In this paper, detailed information on the system functions and experimental results are described.

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Structure Analysis and Loading Test of Bogie Frame (대차틀의 구조해석 및 하중시험에 관한 연구)

  • Yoon Sung-Chol;Park Sung-Hyuk;Lee Kang-won;Kim Won-kyung;Hong Yung-Ki
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.199-205
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    • 2004
  • This paper describes the result of structure analysis and load test of bogie frame. The purpose of the analysis and test is to evaluate an safety which bogie frame shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load. Bogie system consist of bogie frame, suspensions, wheel-sets, brake system and transmission system. Among these component, the bogie frame is most significant component subjected to the vehicle and passenger loads. The evaluation method is used the JIS E 4207 specification throughout the FEM analysis and static load test. The test results have been very safety and stable for design load conditions.

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Strength Evaluation of Bogie by Loading Test (하중시험에 의한 대차의 강도 평가)

  • Yoon Sung-Cheol;Kwon Sung-Tae;Kim Myung-Rong;Lee Kang-Won
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.622-627
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    • 2004
  • This paper describes the result of load test of bogie frame. The purpose of test is to evaluate an safety which bogie frame shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load. Bogie system consist of bogie frame, suspensions, wheel-sets, brake system and transmission system. Among these component, the bogie frame is the most significant component subjected to the vehicle and passenger loads. The evaluation method is used the JIS E 4207 specification throughout the static load test. The test results have been very safety and stable for design load conditions.

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Talmudic Approach to Load Shedding of Islanded Microgrid Operation Based on Multiagent System

  • Kim, Hak-Man;Kinoshita, Tetsuo;Lim, Yu-Jin
    • Journal of Electrical Engineering and Technology
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    • v.6 no.2
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    • pp.284-292
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    • 2011
  • This paper presents a load-shedding scheme using the Talmud rule in islanded microgrid operation based on a multiagent system. Load shedding is an intentional load reduction to meet a power balance between supply and demand when supply shortages occur. The Talmud rule originating from the Talmud literature has been used in bankruptcy problems of finance, economics, and communications. This paper approaches the load-shedding problem as a bankruptcy problem. A load-shedding scheme is mathematically expressed based on the Talmud rule. For experiment of this approach, a multiagent system is constructed to operate test islanded microgrids autonomously. The suggested load-shedding scheme is tested on the test islanded microgrids based on the multiagent system. Results of the tests are discussed.

A study on the Structural Analysis and Loading Test of Bogie Frame (대차틀의 구조해석 및 하중시험에 관한 연구)

  • Kim Won-kyung;Yoon Sung-Cheol
    • Journal of the Korean Society for Railway
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    • v.8 no.6 s.31
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    • pp.566-572
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    • 2005
  • This paper describes the results of structural analysis and loading test of a bogie frame. The purpose of the analysis and test is to evaluate the safety and functionality of the bogie frame under maximum load. The bogie system consist of the bogie frame, suspensions, wheel-sets, a brake system and a transmission system. Of these components, the bogie frame is the major components subjected to the vehicle and passenger loads. The evaluation method used the JIS E 4207 specifications throughout the FEM analysis and static load test. The test results have shown the bogie frame to be safe and stable under design load conditions.

Transformation of Flight Load to Test Load for the Static Load Test of External Fuel Tank for Aircraft (항공기용 외부연료탱크 정하중시험을 위한 비행하중의 시험하중으로의 변환)

  • Kim, Hyun-gi;Kim, Sung Chan;Park, Sung Hwan;Ha, Byoung Geun;An, Su Hong;Kim, Jun Tae
    • Journal of Aerospace System Engineering
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    • v.15 no.1
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    • pp.80-85
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    • 2021
  • In this study, for conducting a static load test of an external fuel tank used for an aircraft, the flight load acting on the external fuel tank was converted to the test load and the suitability of the converted test loads was confirmed. In order to calculate the test load from the flight load, the external fuel tank was divided into several sections. Shear load, moment by unit shear load, and unit moment were calculated for each section. Test loads for each section were then calculated by computing the shear load, the moment of each section, and flight load condition. In actual static load tests, it might not be possible to impose the test load in the calculated position due to physical constraints. Therefore, after determining positions in which the load could be imposed in the actual test, the test load calculated for each section was redistributed to selected positions. Finally, a test load plan was established by applying a whiffle tree to enhance the efficiency of the test performance while making it easier to operate the actuator. The reliability of the test load plan was verified by comparing it with flight load conditions.

Performance Monitoring and Load Analysis of Wind Turbine (풍력발전기의 성능 모니터링 및 하중분석)

  • Bae, Jae-Sung;Kim, Sung-One;Youn, Joung-Eun;Kyung, Nam-Ho
    • 유체기계공업학회:학술대회논문집
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    • 2004.12a
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    • pp.385-389
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    • 2004
  • Test facilities for the wind turbine performance monitoring and mechanical load measurements are installed in Vestas 100 kW wind turbine in Wollyong test site, Jeju island. The monitoring system consists of Garrad-Hassan T-MON system, telemetry system for blade load measurement, various sensors such as anemometer, wind vane, strain gauge, power meter, and etc. The experimental procedure for the measurement of wind turbine loads, such as edgewise(lead-lag) bending moment, flapwise bending moment, and tower base bending moment, has been established. Strain gauges are on-site calibrated against load cell prior to monitoring the wind turbine loads. Using the established monitoring system, the wind turbine is remotely monitored. From the measured load data, the load analysis has been performed to obtain the load power spectral density and the fatigue load spectra of the wind turbine.

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Bridge load testing and rating: a case study through wireless sensing technology

  • Shoukry, Samir N.;Luo, Yan;Riad, Mourad Y.;William, Gergis W.
    • Smart Structures and Systems
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    • v.12 no.6
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    • pp.661-678
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    • 2013
  • In this paper, a wireless sensing system for structural field evaluation and rating of bridges is presented. The system uses a wireless platform integrated with traditional analogue sensors including strain gages and accelerometers along with the operating software. A wireless vehicle position indicator is developed using a tri-axial accelerometer node that is mounted on the test vehicle, and was used for identifying the moving truck position during load testing. The developed software is capable of calculating the theoretical bridge rating factors based on AASHTO Load and Resistance Factor Rating specifications, and automatically produces the field adjustment factor through load testing data. The sensing system along with its application in bridge deck rating was successfully demonstrated on the Evansville Bridge in West Virginia. A finite element model was conducted for the test bridge, and was used to calculate the load distribution factors of the bridge deck after verifying its results using field data. A confirmation field test was conducted on the same bridge and its results varied by only 3% from the first test. The proposed wireless sensing system proved to be a reliable tool that overcomes multiple drawbacks of conventional wired sensing platforms designed for structural load evaluation of bridges.

Actuator and load test system development for continuous variable thruster (연속가변 추력기용 구동장치 및 부하시험장비 개발)

  • Kim, Namjin;Kim, Hyoungkwon;Park, Hyunho;Lim, Jinwan;Suh, Suhkhoon;Park, Iksoo
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2017.05a
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    • pp.401-405
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    • 2017
  • Continuous variable thrusters require precise thrust control to change the position or attitude of the aircraft and to control the pressure inside the combustion chamber. For this purpose, the thrust is adjusted by moving the pintle structure near the nozzle neck inside the combustion chamber by moving the pintle structure forward and backward, and the actuator is used to move the pintle structure. In this paper, we developed a actuator system for continuous variable thruster and load test system to simulate the load under operating conditions. Also, the performance test of the actuator was performed using the developed load test system

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대구경 소켓경사반력말뚝의 인발거동에 관한 연구

  • 최용규;김상옥;정창규;정성기;김상일
    • Proceedings of the Korean Geotechical Society Conference
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    • 2000.11a
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    • pp.277-284
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    • 2000
  • Using the large diameter (D = 2,500mm, L = 40m) batter steel pipe piles, designed as compression piles but used as reaction piles during the static compression load test of socketed test piles (D = 1,000mm, L = 40m), static pile load tests for large diameter instrumented rock-socketed piles were performed. The reaction steel pipe piles were driven 20m into the marine deposit and weathered rock layer and then l0m socketed with reinforced concrete through the weathered rock layer and into hard rock layer. Steel pipe and concrete in the steel pile part, and concrete and rebars in the socketed parts were instrumented to measure strains in each part. The pullout amounts of reaction pile heads were also measured with LVDT. During the static pile load test, total compressional load of about 20MN was loaded on the head of test piles, but load above 20MN was not loaded due to lack of loading capacity of loading system. Over the course of the study, maximum pullout amount up to 7mm was measured in the heads of reaction piles when loaded op to 10MN and 1mm of pullout amount was measured. More than 85% of pullout load was transfered in the residual weathered rock layer and about 10% in the soft rock layer, which was somewhat different transfer mechanism in the static compressional load tests.

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