• 제목/요약/키워드: Load Test System

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승용차용 전장시험 자동화 시스템 설계 (Design of an Automatic Test System for Electronic Equipments in Vehicles)

  • 이창훈;김유남
    • 한국자동차공학회논문집
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    • 제9권1호
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    • pp.131-138
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    • 2001
  • The performance analysis of an electronic equipment test is very complicate due to the variety o vehicles. In this study, automatic design system for the electronic equipment test has been carried out using the standard load patterns. For the test, standard signal patterns for each item are modeled. The test items can be decided by the user by means of these patterns. Also, engineering software modules are developed and proved to be very efficient for analyzing the test results statistically. Experiments are performed for the test system in the vehicle assembly line. By analyzing the test results, it is found that bad samples can be detected without failure. Also, the engineering software modules provide an analytical tool for the automation of the test process.

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슬리브관을 갖는 로드셀을 이용한 주퇴봉 당김력 계측시스템 개발 (A Development of the Recoil Rod Pull Force Measurement System Using the Load Cell with Sleeve)

  • 최주호;홍성수;유준
    • 제어로봇시스템학회논문지
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    • 제7권2호
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    • pp.152-159
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    • 2001
  • This paper presents a development of the recoil rod pull force measurement system suing the load cell with a sleeve normally available in the recoil system test. The commercial load cell cannot be used in the test of recoil system floating the breach contact point freely in the air. The load cell is designed and manufactured to meet the recoil system test condition. Theoretical analysis and experimental results show that the accuracy of the developed measurement system is within $\pm$0.5%. We notice that the measurement technique proposed in this paper is accurate and useful in the recoil rod pull force measurement of the recoil system.

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굴착기 내구시험 모니터링을 위한 작업부하 지표 개발 (Development of a Workload Index for Monitoring Durability Test of an Excavator)

  • 조재홍;나선준;김민석;박명관
    • 드라이브 ㆍ 컨트롤
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    • 제19권4호
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    • pp.29-35
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    • 2022
  • In this paper, we developed a workload index for monitoring the durability test using operation information of an excavator. First, the acceleration and cylinder pressure were selected as load factors by analyzing operation data. Through load correlation analysis according to each load factor, Root Mean Square (RMS) and Work Load Range (WLR) were respectively derived as a load feature representing mechanical load. In addition, the workload index was used to quantify load features. For applying the workload index to monitoring, a real-time monitoring system consisting of sensors and embedded controller was installed on the excavator and the system was integrated with a remote monitoring environment using a wireless network. Results of load monitoring and analysis verified that the developed workload index was effective from the viewpoint of the relative comparison of the workload.

탄소섬유강화플라스틱 재료 레저선박의 구조강도 평가를 위한 시험설비 구축과 운용에 관한 연구 (The Development of Structural Test Facility for the Strength Assessment of CFRP Marine Leisure Boat)

  • 정한구;장양;염덕준
    • 대한조선학회논문집
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    • 제54권4호
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    • pp.312-320
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    • 2017
  • This paper deals with the development of structural test facility for the strength assessment of marine leisure boat built from carbon fiber reinforced plastics (CFRP) materials. The structural test facility consists of test jig, load application and control system, and data acquisition system. Test jig, and load application and control system are designed to accommodate various size and short span to depth ratios of single skin, top-hat stiffened and sandwich constructions in plated structural format such as square and rectangular shapes. A lateral pressure load, typical and important applied load condition to the plates of the hull structure for marine leisure boat, is simulated by employing a number of hydraulic cylinders operated automatically and manually. To examine and operate the structural test facility, five carbon/epoxy based FRP square plates having the test section area of $1m^2$, which are part of CFRP marine leisure boat hull, are prepared and they are subjected to monotonically increasing lateral pressure loads. In the test preparation, considering the symmetry of the plates geometry, various strain gauges and linear variable displacement transformer are used in conjunction with data acquisition system utilizing LabVIEW. From the test observation, the responses of the CFRP hull structure of marine leisure boat are understood by obtaining load to deflection and strain to load curves.

고온초전도 응용기기용 과냉질소 냉각시스템의 냉각특성 (Characteristics of Sub-cooled Nitrogen Cryogenic System for Applied High-Tc Superconducting Devices)

  • 강형구;김형진;배덕권;안민철;윤용수;장호명;고태국
    • 한국초전도ㆍ저온공학회논문지
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    • 제6권1호
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    • pp.38-42
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    • 2004
  • The cryogenic system for 6.6 kV/200 A inductive superconducting fault current limiter (SFCL) was developed at Yonsei university in 2003. The sub-cooled nitrogen cryogenic system could be applied to not only SFCL but also many other applied high-Tc superconducting (HTS) devices like superconducting motor, superconducting generator and superconducting magnetic energy storage (SMES). Generally, the cooling capacity of GM-cryocooler depends on the load temperature. Therefore it is necessary to perform the cooling capacity test at no load condition to calculate the exact cooling power and heat load of cryogenic system. In this research, the cooling capacity test of GM-cryocooler was executed and the heat load of developed cryogenic system was calculated. The long run operation test results of sub-cooled nitrogen cryogenic system were successful in pressure and temperature condition. Moreover, the design and fabrication method of cryogenic system were introduced and the test results were described.

마이크로컴퓨터를 이용(利用)한 엔진 성능시험(性能試験)의 자동화(自動化)에 관한 연구(硏究)(II) -모의(模擬) 부하시험(負荷試験) 시스템의 구성(構成) 및 평가(評價)- (A Microcomputer-Based Data Acquisition/Control System for Engine Performance Test(II) -Construction and Evaluation of a Load Simulation System-)

  • 류관희;배영환;윤기직
    • Journal of Biosystems Engineering
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    • 제14권1호
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    • pp.1-7
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    • 1989
  • This study was carried out to develop a system and methodology to simulate the engine load variation occuring during agricultural field operations for a laboratory engine test. The system consisted of an electric dynamometer, an Apple II microcomputer, and a data acquisition and control system. Several pieces of instruments were utilized to measure various engine performance data. Both engine torque and engine speed were fully controlled by a computer program. The dynamic characteristics of the system were analyzed through a series of tests and the limitations on the load simulation test were presented. The results of the study are summarized as follows: 1. Engine speed and toque were controlled by a computer program. The use of a stepping motor and reduction gears enabled engine speed be controlled within 1 rpm. 2. The natural frequency of the dynamometer-engine system was found to be around 5 Hz, at which the load simulation would be impossible because of resonance. 3. For the harmonic inputs with the frequencies above the natural frequency, the signal attenuated too much and therefore the load simulation was impossible. 4. The step response of the system showed an overshoot of 24.5 percent and the settling time for 5 percent criterion was around 3 seconds. 5. When actual field test data are utilized for load simulation, a low-pass filter should be included to attenuate the frequency components around and above the natural frequency.

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부하차단시험에 의한 서인천복합화력 발전기.제어계의 모델링 및 검증 (Modeling and verification of generator/control system of Seo-Inchon combined-cycle plant by load rejection test)

  • 최경선;문영환;김동준;추진부;류승헌;권태원
    • 대한전기학회논문지
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    • 제45권4호
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    • pp.501-510
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    • 1996
  • The gas-turbine generator of Seo-Incheon combined-cycle plant was tested for derivation of a model for dynamic analysis. Load rejection and AVR step test was performed to get the dynamic response of generator. The parameters of generator/control system model were determined by these measured data. No-load saturation test was performed for the saturation characteristics of the generator under steady state. V-curve test was also performed so as to find exact generator parameters. Q-axis parameters of generator was derived by measuring power angle. AVR and governor constants have been tuned by their oscillatory period and setting time characteristics. The derived parameters of generator control system is verified by one-machine infinite bus system simulation. (author). 7 refs., 20 figs., 5 tabs.

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철도차량 추진제어장치 성능시험을 위한 관성부하 시험설비의 구조안전성 및 동특성 평가 연구 (A Study on Structural Integrity and Dynamic Characteristic of Inertial Load Test Equipment for Performance Test of Railway Vehicle Propulsion Control System)

  • 장형진;신광복;이상훈;이대봉
    • 한국철도학회논문집
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    • 제13권4호
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    • pp.363-370
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    • 2010
  • 본 논문은 철도차량용 추진제어장치의 성능평가를 위한 관성부하 시험설비의 구조안전성 및 동특성 평가를 연구하였다. 추진제어장치는 철도차량의 핵심 부품으로서 차량에 적용하기 전에 안정성 및 신뢰성 검증이 충분히 이루어 져야 한다. 따라서 추진제어장치의 성능시험을 위한 관성부하 시험설비를 이론식을 바탕으로 하여 설계하였다. 설계된 관성부하 시험설비에 대해 Ansys v11.0을 이용하여 구조해석을 수행하였으며, ADAMS를 통해 동특성을 평가하였다. 관성부하 시험설비의 구조안전성은 조합하중하의 베어링에서 안전계수가 10.2로 만족하였다. 또한, 동적 시뮬레이션에 따른 플라이휠은 0.83mm이내의 최대진폭변위로 구조적 안정성이 확보되었다.

전기철도 급전시스템의 안정화를 위한 전압강하 측정 결과 분석 (Measurement and Analysis of Voltage Drop in Traction Power Supply System)

  • 김주락;이영흠
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2011년도 제42회 하계학술대회
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    • pp.2210-2211
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    • 2011
  • Load capacity varies according to a day of the week in traction power supply system, because time schedule in railway is changed as demand for passengers and freights. Therefore, Voltage drop also varies as load capacity. In Korea railway, Voltage collected from catenary in train is decreased, as load supplied traction power supply system is increased. Therefore, investigation about voltage drop should be performed, before development of countermeasure against voltage drop. The investigation can be performed by simulation or field test. Naturally, field test is more precise than simulation. In addition, field test should be carried out at peak load. This paper presents test and analysis about voltage drop in railway. The test is performed in both a day of the week and weekend. The analysis is figured out comparison load capacity between two days and voltage drop across terminal.

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신형전동차 대차프레임 하중시험결과 분석 연구 (A Study on Analysis of Load Test Result of Bogie Frame for New Electrical Multiple Unit)

  • 김원경;윤성철;전창성
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2005년도 추계학술대회 논문집
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    • pp.1056-1062
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    • 2005
  • This paper describes the results of structure analysis and load test of a bogie frame. The purpose of the test is to evaluate the safety and functionality of the bogie frame under maximum load. The bogie system consist of the bogie frame, suspensions, whee/sets, a brake system and a transmission system. Of these components, the bogie frame is the major component subjected to the vehicle and passenger loads. The evaluation method used the JIS E 4207 specifications throughout static load test. The test results have shown the bogie frame to be safe under design load conditions.

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