• Title, Summary, Keyword: Model test

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Seismic Test of a Full Scale Model of Wood House with Tiled Roof (기와집 실물크기 모델의 지진 실험)

  • Ryu, Hyeuk;Kim, Jae-Kwan;Jeon, Bong-Hee;Kim, Byung-Hyun
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.368-373
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    • 2003
  • To improve the reliability of seismic hazard assessment of historic earthquake, shaking table test of a full scale model of wood house with tiled roof was performed. Full scale model was constructed through rigorous verification process to have quantitative relationship between the intensity of earthquake and damage state. The completed model was mounted on a shaking table and subjected to the dynamic tests. Two kinds of tests were performed: exploratory test and fragility test. The exploratory test was done with low intensity shaking. In the fragility test, the behavior of the model was carefully monitored while increasing the shaking intensity. The construction details of the model are provided and test procedures are reported. Finally important test results are presented and their implications are discussed.

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Seismic Test of a 1/2 Scale Model of Wood House with Thatched Roof (초가집 1/2 축소 모델의 지진 실험)

  • Ryu, Hyeuk;Kim, Jae-Kwan;Huh, Young-Chul;Jeon, Bong-Hee
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • pp.247-252
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    • 2003
  • To improve the reliability of seismic hazard assessment of historic earthquake, shaking table test of a 1/2 scale model of wood house with thatched roof was peformed. Scaled model was constructed through rigorous verification process to have quantitative relationship between the intensity of earthquake and damage state. The completed model was mounted on a shaking table and subjected to the dynamic tests. Two kinds of tests were performed: exploratory test and fragility test. The exploratory test was done with low intensity shaking. In the fragility test, the behavior of the model was carefully monitored while increasing the shaking intensity. The construction details of the model are provided and test procedures are reported. Finally important test results are presented and their implications are discussed.

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INVESTIGATION OF THE PILE MOVEMENT DUE TO TUNNELLING BY MODEL TEST AND NUMERICAL ANALYSIS

  • Lee, Yong-Joo
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.104-110
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    • 2010
  • In this study, a series of two-dimensional model test and numerical analysis was carried out to investigate the pile movement due to tunnelling in soft ground. The model test consists of 21 cases according to locations of the pile tip over the centre position of model tunnel. To identify both the pile and ground movements a close-range photogrammetric technique was adopted in the model test. The results from the model test were compared to the two-dimensional finite element analysis using the CRISP program. It was found that the rotation point on the pile was significantly affected by factors such as the offset distance from the model tunnel and the volume loss that occurred during the tunnelling operation.

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Model-based Test Cases Generation Method for Weapons System Software (무기체계 소프트웨어의 모델 기반 테스트 케이스 생성 방법)

  • Choi, Hyunjae;Lee, Youngwoo;Baek, Jisun;Kim, Donghwan;Cho, Kyutae;Chae, Heungseok
    • Journal of the Korea Institute of Military Science and Technology
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    • v.23 no.4
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    • pp.389-398
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    • 2020
  • Test cases in the existing weapon system software were created manually by the tester analyzing the test items defined in the software integration test procedure. However, existing test case generation method has two limitations. First, the quality of test cases can vary depending on the tester's ability to analyze the test items. Second, excessive time and cost may be incurred in writing test cases. This paper proposes a method to automatically generate test cases based on the requirements model and specifications to overcome the limitations of the existing weapon system software test case generation. Generate test sequences and test data based on the use case event model, a model representing the requirements of the weapon system software, and the use case specification specifying the requirements. The proposed method was applied to 8 target models constituting the avionics control system, producing 30 test sequences and 8 test data.

A Study on the Model Test Scheme for Establishing the Mathematical Model of Hydrodynamic Force and Moment Acting on a Slowly Moving Ship (저속시 선체에 작용하는 유체력 수학모형 정립을 위한 모형시험 방안 연구)

  • Yoon, Hyeon-Kyu;Kim, Sun-Young
    • Journal of the Society of Naval Architects of Korea
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    • v.42 no.2
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    • pp.98-104
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    • 2005
  • The mathematical models of hydrodynamic force and moment acting on a ship at low speed range should be established differently from the ones at nominal cruising speed range since a ship moves with large drift angle or rotates in a stationary position. We modified widely used Yoshimura's cross flow model in order to apply the system identification method to estimate parameters in the model. The apparatus and the procedure of free running model test were suggested so that the parameters in the model be estimated. The validity of our proposing modified model and test procedure was confirmed by comparison with the results of simulated model test.

Improvement of the Automobile Control Software Testing Process Using a Test Maturity Model

  • Jang, Jin-Wook
    • Journal of Information Processing Systems
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    • v.14 no.3
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    • pp.607-620
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    • 2018
  • The problem surrounding methods of implementing the software testing process has come under the spotlight in recent times. However, as compliance with the software testing process does not necessarily bring with it immediate economic benefits, IT companies need to pursue more aggressive efforts to improve the process, and the software industry needs to makes every effort to improve the software testing process by evaluating the Test Maturity Model integration (TMMi). Furthermore, as the software test process is only at the initial level, high-quality software cannot be guaranteed. This paper applies TMMi model to Automobile control software testing process, including test policy and strategy, test planning, test monitoring and control, test design and execution, and test environment goal. The results suggest improvement of the automobile control software testing process based on Test maturity model. As a result, this study suggest IT organization's test process improve method.

Incremental Model-based Test Suite Reduction with Formal Concept Analysis

  • Ng, Pin;Fung, Richard Y.K.;Kong, Ray W.M.
    • Journal of Information Processing Systems
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    • v.6 no.2
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    • pp.197-208
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    • 2010
  • Test scenarios can be derived based on some system models for requirements validation purposes. Model-based test suite reduction aims to provide a smaller set of test scenarios which can preserve the original test coverage with respect to some testing criteria. We are proposing to apply Formal Concept Analysis (FCA) in analyzing the association between a set of test scenarios and a set of transitions specified in a state machine model. By utilizing the properties of concept lattice, we are able to determine incrementally a minimal set of test scenarios with adequate test coverage.

An Efficient Software Reliability Testing Method for the Model based Embedded Software (모델 기반 내장형 소프트웨어의 효율적 신뢰성 시험 기법)

  • Park, Jang-Seong;Cho, Sung-Bong;Park, Hyun-Yong;Kim, Do-Wan;Kim, Seong-Gyun
    • Journal of the Korea Society for Simulation
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    • v.27 no.1
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    • pp.25-32
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    • 2018
  • This paper presents an efficient software reliability testing method for the model based auto-generated code and reify a dynamic test procedure. The benefits of executing the model-based each static/dynamic reliability test before the code-based static/dynamic reliability test are described. Also, The correlations of code/model based reliability test are demonstrated by using model testing tool, Model Advisor and Verification and Validation, and the code testing tool, PolySpace and LDRA. The result of reliability test is indicated in this paper.

A Research on Dynamic Tension Response of Model Mooring Chain by Forced Oscillation Test (강제동요 시험을 이용한 모형 계류삭의 동적 응답 연구)

  • Cho, Seok-Kyu;Hong, Sa-Young;Hong, Sup;Kim, Hyun-Joe
    • Journal of Ocean Engineering and Technology
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    • v.19 no.3
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    • pp.39-46
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    • 2005
  • A series of forced oscillation tests on a model mooring chain was carried out to investigate dynamic tension characteristics. The model test was conducted at two different water depths to gather basic data for a 'truncated mooring test' and 'hybrid mooring test'. The truncated and hybrid mooring tests are important for overcoming the limitation of water depth that existed in previous model tests. The resultant tension RAO provides a good possibility of approximation of dynamic tension by equivalent weight adjustment for different water depths. Because the hybrid mooring test is an adequate combination of model test and simulation, an accurate simulation model for the mooring system is essential. The simulation results show good agreement with model test results.

Model Checking for Time-Series Count Data

  • Lee, Sung-Im
    • Communications for Statistical Applications and Methods
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    • v.12 no.2
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    • pp.359-364
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    • 2005
  • This paper considers a specification test of conditional Poisson regression model for time series count data. Although conditional models for count data have received attention and proposed in several ways, few studies focused on checking its adequacy. Motivated by the test of martingale difference assumption, a specification test via Ljung-Box statistic is proposed in the conditional model of the time series count data. In order to illustrate the performance of Ljung- Box test, simulation results will be provided.