• 제목/요약/키워드: Quality verification

검색결과 1,108건 처리시간 0.022초

Development of a Data Acquisition System for the Testing and Verification of Electrical Power Quality Meters

  • Simic, Milan;Denic, Dragan;Zivanovic, Dragan;Taskovski, Dimitar;Dimcev, Vladimir
    • Journal of Power Electronics
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    • 제12권5호
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    • pp.813-820
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    • 2012
  • This paper presents the development of a software supported acquisition system for metrological verification and testing of the equipment for monitoring and analysis of the basic electrical power quality parameters. The described procedure consists of two functionally connected segments. The first segment involves generation of the reference three-phase voltage signals, including the possibility of simulation of the various power quality disturbances, typical for electrical power distribution networks. The second part of this procedure includes the real-time recording of power quality disturbances in three-phase distribution networks. The procedure is functionally supported by the virtual instrumentation concept, including a software application developed in LabVIEW environment and data acquisition boards NI 6713 and NI 9215A. The software support of this system performs graphical presentation of the previously generated and recorded signal waveforms. A number of the control functions and buttons, implemented on the virtual instrument front panels, are provided to adjust the basic signal acquisition, generation and recording parameters.

비행제어시스템 설계 및 검증 절차 (Flight Control System Design and Verification Process)

  • 김종섭
    • 제어로봇시스템학회논문지
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    • 제14권8호
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    • pp.824-836
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    • 2008
  • Relaxed static stability(RSS) concept has been applied to improve aerodynamic performance of modern version supersonic jet fighter aircraft. Therefore, flight control systems are necessary to stabilize an unstable aircraft, and provides adequate handling qualities and achieve performance enhancements. Standard FCSDVP (Flight Control System Design and Verification Process) is provided to reduce development period of the flight control system. In addition, if this process is employed in developing flight control system, it reduces the trial and error for development and verification of flight control system. This paper addresses the flight control system design and verification process for the RSS aircraft utilizing design goal based on military specifications, linear and nonlinear system design and verification based on universal software, handling quality test based on HILS(Hardware In-the-Loop Simulator) environment, and ground and flight test results to verify aircraft dynamic flight responses.

유아교육기관의 서비스품질 요인이 고객만족에 미치는 영향에 관한 연구 : 유치원과 보육기관 비교 분석 (An Effect of Service Quality Factors on Customer Satisfaction in Infant Education Institutes : Centered on the Comparison of Kindergartens and Daycare Centers)

  • 최성용;권미영
    • 품질경영학회지
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    • 제34권2호
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    • pp.48-67
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    • 2006
  • In this study, an investigation was done into service qualify factors of infant education Institutes, after which a positive verification was made in the relation of cause and effect between service quality, service value and customer satisfaction. Based on this verification, strategies were presented for plans to improve the service quality of infant education. In addition, identification was made into factors that affect customer satisfaction, re-registration intention and recommendation to others in putting forward service operational strategies for infant education institutes and making a comparative analysis on kindergartens and daycare centers.

Verification of Safety Critical Software

  • Son, Ki-Chang;Chun, Chong-Son;Lee, Byeong-Joo;Lee, Soon-Sung;Lee, Byung-Chai
    • Nuclear Engineering and Technology
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    • 제28권6호
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    • pp.594-601
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    • 1996
  • To assure quality of safety critical software, software should be developed in accordance with software development procedures and rigorous software verification and validation should be performed. Software verification is the formal act of reviewing, testing or checking, and documenting whether software components comply with the specified requirements for a particular stage of the development phase [1]. New software verification methodology was developed and was applied to the Shutdown System No. 1 and 2(SDS1,2) for Wolsong 2, 3 and 4 nuclear power plants by Korea Atomic Energy Research Institute(KAERI) and Atomic Energy of Canada Limited(AECL) in order to satisfy new regulation requirements of Atomic Energy Control Board(AECB). Software verification methodology applied to SDS1 for Wolsong 2, 3 and 4 project will be described in this paper. Some errors were found by this methodology during the software development for SDS1 and were corrected by software designer. Output from Wolsong 2, 3 and 4 project have demonstrated that the use of this methodology results in a high quality, cost-effective product.

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Preliminary study of artificial intelligence-based fuel-rod pattern analysis of low-quality tomographic image of fuel assembly

  • Seong, Saerom;Choi, Sehwan;Ahn, Jae Joon;Choi, Hyung-joo;Chung, Yong Hyun;You, Sei Hwan;Yeom, Yeon Soo;Choi, Hyun Joon;Min, Chul Hee
    • Nuclear Engineering and Technology
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    • 제54권10호
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    • pp.3943-3948
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    • 2022
  • Single-photon emission computed tomography is one of the reliable pin-by-pin verification techniques for spent-fuel assemblies. One of the challenges with this technique is to increase the total fuel assembly verification speed while maintaining high verification accuracy. The aim of the present study, therefore, was to develop an artificial intelligence (AI) algorithm-based tomographic image analysis technique for partial-defect verification of fuel assemblies. With the Monte Carlo (MC) simulation technique, a tomographic image dataset consisting of 511 fuel-rod patterns of a 3 × 3 fuel assembly was generated, and with these images, the VGG16, GoogLeNet, and ResNet models were trained. According to an evaluation of these models for different training dataset sizes, the ResNet model showed 100% pattern estimation accuracy. And, based on the different tomographic image qualities, all of the models showed almost 100% pattern estimation accuracy, even for low-quality images with unrecognizable fuel patterns. This study verified that an AI model can be effectively employed for accurate and fast partial-defect verification of fuel assemblies.

모바일 앱 재사용성 측정을 위한 메트릭 개발 (Development of Metrics to Measure Reusability of Mobile App.)

  • 조은숙;김철진;송치양
    • 한국산학기술학회논문지
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    • 제15권7호
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    • pp.4500-4507
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    • 2014
  • 스마튼 폰 사용자들의 수가 기하급수적으로 증가함에 따라 향후 모바일 시장의 규모는 엄청나게 거대해질 것으로 전망되고 있다. 이러한 성장세에 맞춰 많은 형태의 모바일 앱들이 개발되고 있다. 그런데 문제는 개발된 앱들에 대한 재사용성, 확장성 등과 같은 품질에 대한 검증이 제대로 이루어지고 있지 않다. 특히 유료 앱의 경우, 사용자들로 하여금 많은 불만의 요소들이 생기고 있는 실정이다. 그래서 본 연구에서는 모바일 앱 개발 과정에서 모바일 앱의 품질을 측정할 수 있는 메트릭을 개발하고자 한다. 이를 통해 모바일 앱에 대한 품질 검증이 이루어짐으로써 사용자들로 하여금 모바일 앱에 대한 만족도를 향상시킬 수 있을 것이라 기대한다.

조선소 생산물류 시뮬레이션 결과 정도 향상을 위한 생산정보시스템 기간 정보 검증 (Quality Verification of Legacy Data of Manufacturing Information System to Improve Results of Shipyard Manufacturing Logistics Simulation)

  • 이종학;이필립;윤경원;남종호
    • 대한조선학회논문집
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    • 제51권6호
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    • pp.510-520
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    • 2014
  • Unlike other mass production in small variety, shipbuilding process is a project-based method in single variety, which causes unpredictable volatility in the planning system. In shipyards, series of manufacturing processes from fabrication to erection is sequentially carried out. In order to predict unfavorable changes such as overload or low load of working volume, computerized simulation has been being gradually adopted. The data used in the simulation are processed from the database of the main scheduling and planning system. Thus the quality of those data is very crucial for the meaningful results. Unfortunately, research on the verification of data quality is very rare and hardly known to the authors. In this work, using the database of scheduling and product information system of a large domestic shipyard, the data required for the simulation are qualitatively analyzed and verified.

이미지 처리기술을 이용한 온라인 바코드 품질검사 시스템 (An On-Line Barcode Verification System using Image Processing Technique)

  • 이주호;송하주
    • 한국전자통신학회논문지
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    • 제7권5호
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    • pp.1053-1059
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    • 2012
  • 바코드 레이블은 저비용과 편리함으로 인해 물품의 식별을 위해 널리 사용되고 있다. 바코드 레이블은 실링인쇄(seal printing)를 통해 대량으로 생산되는데 그 과정에서 인쇄 품질이 좋지 않거나 레이블 내의 바코드와 텍스트가 서로 일치하지 않는 불량품이 발생하기도 한다. 불량 레이블은 인식 불량 및 업무 오류를 가져오고 이로 인해 물류 지체 및 처리비용 증가를 가져온다. 본 논문에서는 이미지 처리기술을 이용하여 생산단계에서 레이블을 검사하는 온라인 바코드 품질 검사 시스템을 제안한다. 제안 시스템은 카메라에 의해 얻은 이미지를 사용하여 바코드의 품질과 데이터와의 일치성을 검증하고, 불량레이블이 발견되면 경고 신호와 함께 불량임을 표시하여 불량품이 조기에 제거되도록 한다.

Automatic Multileaf Collimation Quality Assurance for IMRT using Electronic Portal Imaging

  • Jin, Ho-Sang;Jason W. Sohn;Suh, Tae-Suk
    • 한국의학물리학회:학술대회논문집
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    • 한국의학물리학회 2002년도 Proceedings
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    • pp.305-308
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    • 2002
  • More complex radiotherapy techniques using multi leaf collimation(MLC) such as intensity-modulated radiation therapy(IMRT) has been increasing the significance of verification of leaf position and motion. Due to the reliability and robustness, quality assurance(QA) of MLC is usually performed with portal films. However, the advantage of ease of use and capability of providing digital data of electronic portal imaging devices(EPIDs) have attracted many attentions as alternatives of films for routine quality assurance in spite of the concerns about their clinical feasibility, efficacy, and the cost to benefit ratio. In our work, the method of routine QA of MLC using electronic portal imaging(EPI) was developed. The verification of availability of EPI images for routine QA was performed by comparison with those of the portal films which were simultaneously obtained when radiation was delivered and known prescription input to MLC controller. Specially designed test patterns of dynamic MLC were applied to image acquisition. Quantitative off-line analysis using edge detection algorithm enhanced the verification procedure in addition to on-line qualitative visual assessment. In conclusion, the EPI is available enough for routine QA with the accuracy of portal films.

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군수품 정부품질보증 위험성 평가제도 개선을 위한 제언 (Proposal for Government Quality Assurance Risk Assessment System for Military Supplies)

  • 안남수
    • 품질경영학회지
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    • 제51권2호
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    • pp.155-170
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    • 2023
  • Purpose: Nowadays, the risk assessment system is widely used in many industrial and public areas to reduce the possible risks. The system is used to determine the priorities of the government quality assurance works in Defense Agency for Technology and Quality. However, as the risk assessment system is used for other purposes, there are some items that need improvement, and in this study, we propose improvement plans by benchmarking the risk assessment systems of other institutions. Methods: In this paper, first, the procedures of risk assessment system used in many industrial sites were reviewed, and how each institution specialized and applied the system. Afterwards, by benchmarking various risk assessment systems, an improvement plan on how to operate the risk assessment system in the case of government quality assurance for centrally procured military supplies was presented, and practical application cases were presented to prove the usefulness of the improvement plan. Results: The proposed risk assessment system differs from the existing system in five major aspects. First, inputs, outputs, and key performance indicators were specified from the systematic point of view. Second, risk analysis was analyzed in four dimensions: probability of occurrence, impact, detection difficulty. Third, risk mitigation measures were classified, control, transfer, and sharing. Fourth, the risk mitigation measures were realized through document verification, product verification, process verification, and quality system evaluation. Finally, risk mitigation measures were implemented and the effectiveness of the risk mitigation measures was evaluated through effectiveness evaluation. Conclusions: In order for the risk assessment procedure proposed in this study to be applied to actual work, it is necessary to obtain the consent of the person involved in the work due to the increased time for risk identification and preparation of the government quality assurance log, and a change in the information system that performs the actual work is required. Therefore, the authors of this study plan to actively perform internal seminar presentations and work improvement suggestions to apply these research outputs to actual work.