• 제목, 요약, 키워드: Performance test load

검색결과 1,663건 처리시간 0.044초

세탁에 의한 섬유손상도 평가방법의 표준화를 위한 연구 (Standardization of the Evaluation Method for the Fabrics Damage by Household Washing Machine)

  • 오경화;홍경화;이현정
    • 한국섬유공학회지
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    • v.38 no.3
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    • pp.144-153
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    • 2001
  • International and Korean standard test methods for evaluating the performance of electrical washing machines for household use were compare. Among various performance criteria, various test methods for evaluating fabric damage suffered by washing agitation during laundering were screened and their reliability and accuracy were compared. In addition, the effect of washing conditions on the fabric damage during laundering was also evaluated. As a result, it was revealed that it is necessary to establish additional standard test methods for evaluating fabric damage, entanglement of washing load, and mechanical detergent loss in the sump of sump of washing machines in Korean industrial standard. Among various test methods for evaluating fabric damage suffered by washing agitation, the test reliability of ISO, and modified IEC methods are better than that of EMPA and AHAM methods. Fabric damage increased severely as washing time, washing load, and the number of rinsing and extraction cycles increased.

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5상 농형 유도전동기의 정수 추정 (Parameters Estimation of Five-phase Squirrel-Cage Induction Motor)

  • 김민회
    • 전기학회논문지P
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    • v.61 no.4
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    • pp.199-205
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    • 2012
  • This paper propose a improved parameter estimations of five-phase squirrel-cage induction motor(IM) for speed control system on field oriented control(FOC). In order to high performance control of ac the motors using a FOC and DTC(direct torque control) algorithm, there are required precise motor parameters for slip calculation, flux observer, controller gain, rotor position and speed estimation, and so on. We are suggest a estimation method of the motor parameters that developing five-phase squirrel-cage IM have a stator of concentrated winding for experimental. There are results of stator winding test, no-load test, locked rotor test, and obtained equivalent circuits using manufactured experimental apparatus. For presenting the superior performance of the speed control system in adapted the parameters, experimental results are presented using a 32-bit fixed point TMS320F2812 DSP with 1.5[KW] IM.

자동차 배터리 지지 구조의 진동 피로 해석에 대한 연구 (Study on Vibration Fatigue Analysis of Automotive Battery Supporter)

  • 안상호
    • 자동차안전학회지
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    • v.11 no.4
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    • pp.22-27
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    • 2019
  • In this paper, the vibration load and analysis results for automotive battery supporter were performed to provide efficient vibration tolerance performance prediction methods for single-product vibration tolerance testing, and the major influencing factors and considerations for setting up single-unit vibration tolerance tests were reviewed. A common applicable standard load was applied to efficiently predict the performance of single-unit vibrations through the frequency response analysis technique. The results similar to test results can be predicted by checking vulnerable parts of the vehicle components for vibration loads and applying scale factor to standard loads. In addition, it was confirmed that the test conditions with a frequency generating the same durability severity as the endurance test are needed for accurate prediction of the durability of the single-unit vibration tolerance test conditions, and the acceleration and frequency with the conditions that there is no significant nonlinear phenomena in the vibration system are established during the single-unit vibration tolerance test conditions.

Behaviors of concrete filled square steel tubes confined by carbon fiber sheets (CFS) under compression and cyclic loads

  • Park, Jai Woo;Hong, Young Kyun;Choi, Sung Mo
    • Steel and Composite Structures
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    • v.10 no.2
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    • pp.187-205
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    • 2010
  • The existing CFT columns present the deterioration in confining effect after the yield of steel tube, local buckling and the deterioration in load capacity. If lateral load such as earthquake load is applied to CFT columns, strong shearing force and moment are generated at the lower part of the columns and local buckling appears at the column. In this study, axial compression test and beam-column test were conducted for existing CFT square column specimens and those reinforced with carbon fiber sheets (CFS). The variables for axial compression test were width-thickness ratio and the number of CFS layers and those for beamcolumn test were concrete strength and the number of CFS layers. The results of the compression test showed that local buckling was delayed and maximum load capacity improved slightly as the number of layers increased. The specimens' ductility capacity improved due to the additional confinement by carbon fiber sheets which delayed local buckling. In the beam-column test, maximum load capacity improved slightly as the number of CFS layers increased. However, ductility capacity improved greatly as the increased number of CFS layers delayed the local buckling at the lower part of the columns. It was observed that the CFT structure reinforced with carbon fiber sheets controlled the local buckling at columns and thus improved seismic performance. Consequently, it was deduced that the confinement of CFT columns by carbon fiber sheets suggested in this study would be widely used for reinforcing CFT columns.

폐 PET병을 이용한 콘크리트 보강 섬유의 부착특성 (Bond Performance of Recycled PET Bottle Fiber Reinforced Concrete)

  • 원종필;박찬기;이수진;김정훈;김황희;이재영
    • 한국콘크리트학회:학술대회논문집
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    • pp.373-376
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    • 2006
  • The purpose of this study was manufactured and evaluated the bond performance of recycled polyethylene terephthalate(PET) bottle fiber reinforced concrete. Four deformed recycled PET bottle fibers were manufactured and pullout test was conducted in accordance with the JCI-SF 8. Test parameters included four different type of fiber geometry and two types of mortar specimens. According to bond test results, it was found that embossing type recycled PET bottle fiber was significant improving the pullout load and interface toughness.

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사이드 스러스터 설계 및 성능평가에 관한 연구 (A Study on the Design and Performance Test of Side Thruster)

  • 김형민;김래성;조성현;류성기
    • 한국기계가공학회지
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    • v.16 no.2
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    • pp.1-6
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    • 2017
  • In this paper, we present a study concerning the design of a 400 N class side thruster for small ships. The side thrusters used in Korea are imported from abroad. The performance and durability of the imported products employed in Korea are not adequate, therefore the side thrusters which will be suitable for Korean domestic needs to be re-designed. The strength calculation of the side thruster was performed by KS standard. Strength calculation and design were made to meet design requirements. Structural analysis and safety factor analysis were carried out to confirm the validity of strength calculations and design. After manufacturing the bevel gear, a back lash test was conducted. We also conducted a no-load test, a rated load, and an overload test for a performance test and a durability test of the design while satisfying the design conditions.

고온초전도 벌크 베어링을 사용한 유도 전동기의 특성 시험 (Performance Tests of an Induction Motor with Hexahedron HTS Bulk Bearing)

  • 임형우;이광윤;박명진;차귀수;이지광
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • v.52 no.6
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    • pp.286-290
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    • 2003
  • The high temperature superconducting bulk can be used as the bearing of induction motors. This paper presents the fabrication and test results of an induction motor with superconducting bearings using HTS bulks. The bearing had eight hexahedron type YBCO bulks. Height, width and thickness of the HTS bulk were 30mm, 30mm and 10mm, respectively. Single phase induction motor was used to drive the shaft made of aluminum and the rotor of a conventional induction motor. To estimate the performance of the HTS bulk magnetic bearing, no load test, load test and Impact test were carried out. Load tests were performed by using air resistance caused by the shaft-mounted thin cylinder with buckets. Impact tests by axial direction and vertical direction impact showed that the vibration of the shaft gradually decayed. The induction motor with HTS bulk magnetic bearing rotated silently and smoothly throughout the tests. According to the test results, conventional bearings can be replaced with superconducting magnetic bearings made of HTS bulks.

Testing of Load Capacity of a Foil Thrust Bearing

  • Kim, Choong Hyun;Park, Jisu
    • Tribology and Lubricants
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    • v.34 no.6
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    • pp.300-306
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    • 2018
  • In this study, the performance of foil thrust bearings was investigated by performing bearing take-off and load capacity tests, using an in-house designed and manufactured vertical bearing test rig. The mean take-off rotational speed and maximum load capacity of the bearing specimen were ~18,000 rpm and ~80 kPa, respectively. The vertical bearing test rig was observed to yield higher coefficients of friction and frictional torques than a horizontal bearing test rig under identical test conditions. This was a result of its structural characteristics, in that the bearing specimen is placed atop the thrust runner, which keeps it from being separated from the runner after the bearing take-off. In addition, bearing take-off was observed at a higher runner rotational speed as this structure keeps air from flowing between the top foil and runner surfaces, which requires a higher runner speed. The parallel alignment between the bearing specimen and runner surfaces can be maintained within a certain range more easily in a vertical test rig than in a horizontal test rig. Because of these advantages, Korean Industrial Standard, KS B 2060, recommends a vertical bearing test rig as the standard test device for foil thrust bearings.

Dynamic behaviors of viscous damper on concrete archaized building with lintel-column joint

  • Xue, Jianyang;Dong, Jinshuang;Sui, Yan
    • Earthquakes and Structures
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    • v.13 no.4
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    • pp.409-419
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    • 2017
  • In order to analyze the vibration control effect of viscous damper in the concrete archaized buildings with lintel-column joints under seismic action, 3 specimens were tested under dynamic excitation. Two specimens with viscous damper were defined as the controlled component and one specimen without viscous damper was specified as the non-controlled component. The loading process and failure patterns were obtained from the test results. The failure characteristics, skeleton curves and mechanical behavior such as the load-displacement hysteretic loops, load carrying capacity, degradation of strength and rigidity, ductility and energy dissipation of the joints were analyzed. The results indicate that the load-bearing capacity of the controlled component is significantly higher than that of the non-controlled component. The former component has an average increase of 27.4% in yield load and 22.4% in ultimate load, respectively. Meanwhile, the performance of displacement ductility and the ability of energy dissipation for the controlled component are superior to those of the non-controlled component as well. Compared with non-controlled component, equivalent viscous damping coefficients are improved by 27.3%-30.8%, the average increase is 29.0% at ultimate load for controlled component. All these results reflect that the seismic performance of the controlled component is significantly better than that of the non-controlled component. These researches are helpful for practical application of viscous damper in the concrete archaizing buildings with lintel-column joints.

샤시코너모듈 개발을 위한 부품의 내구 성능 예측에 대한 연구 (A Study on Durability Performance Estimation for Development of Chassis Corner Module)

  • 최성진;박정원;전광기;유영면;최규재;박태원
    • 한국자동차공학회논문집
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    • v.14 no.1
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    • pp.159-166
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    • 2006
  • Chassis system has a large influence on ride quality, stability and NVH performance of a car. To improve the performance and reduce cost, the development of chassis modular assemblies is emphasized. To develop chassis corner modules, it is necessary to predict the performance of full vehicle motion such as ride, handling performance, NVH characteristics and durability of modules. In this paper, full vehicle test is performed to acquire the road load data of chassis corner module of passenger car. 3-axis simulator modeling are carried out to simulate reaction force analysis and fatigue analysis of new developed modules. Also, real simulator tests to validate performance of new developed modules are performed. We had developed the accelerated durability test procedure of KATECH PG and it is used to test chassis corner modules at laboratory and simulate durability performance. All these results have been provided to module and parts company and make an important role to develop chassis corner modules.