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"적합성"

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A Study on FMECA by Technical Specification for Railway Constituent
Kang Ho Lee, Duck Ho Shin, Hyun Jeong Jo, Kang Mi Lee
J. Korean Soc. Precis. Eng. 2024;41(5):383-394.
Published online May 1, 2024
DOI: https://doi.org/10.7736/JKSPE.023.132
The Technical Specification for Interoperability (TSI) legally mandates the prediction and verification process of the Reliability, Availability, Maintainability and Safety (RAMS) in signaling and communication systems. Recently, domestic regulations, including the Railroad Safety Act, have been strengthened in order to better meet the requirements for participating in international projects. To comply with these regulatory requirements, manufacturers and development organizations must prepare verification data pertaining to the reliability and safety of railway components and related systems. This paper aims to analyze the requirements of Failure Mode, Effects and Criticality Analysis (FMECA) through international laws and standards, and subsequently propose a compliant FMECA system for the domestic railway industry. The proposed FMECA system is then compared with the analysis results of actual failure data to determine its suitability for establishing a Reliability, Availability, Maintainability (RAM) verification standard for railway products in relation to conformity assessment.
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Validation of Structural Safety for Flight Compatibility of Pod Mounted Aircraft External under Flight Load Conditions
Woo Je Cho, Dong Seol Choi, Jin Bo Park, Sun Kyu Ann
J. Korean Soc. Precis. Eng. 2024;41(4):251-260.
Published online April 1, 2024
DOI: https://doi.org/10.7736/JKSPE.023.113
A pod mounted on an aircraft external must be installed on an aircraft after its structural safety is verified under flight conditions. This paper presents methods of flight load and test load generation. Evaluation of test result data and standards for failure mode are also presented. First of all, to verify the static structural stability, flight loads for the aircraft maneuvering conditions were calculated. Finite element analysis was then performed with flight loads. As a result of the analysis, structures were verified to have a margin of safety for a given design requirement. In addition, it was confirmed that the launcher tube had enough rigidity to support the missile. Thus, the role of stinger such as longeron and hardback was insignificant. Finally, based on results of tests and analysis, the static structural stability of pod was substantiated and the reliability and effectiveness of the analysis model were obtained. These results and dynamic stability verification results suggest that an optimal design is necessary.

Citations

Citations to this article as recorded by  Crossref logo
  • Calculation of Flight Loads and Structural Robustness Analysis of Aircraft External Stores Considering Low Speed Rotorcraft Installation
    Ji Hwan Park, Chang Bong Ban, Jong Hwan Kim, Sun Kyu Ahn
    Journal of the Korean Society for Precision Engineering.2025; 42(8): 613.     CrossRef
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This paper proposes a new improved methodology to assess reconfiguration manufacturing system (RMS) adaptability in small and medium manufacturing industries. The evaluation of scenarios and alternatives for a reconfigurable design in manufacturing systems requires efficient and convenient methodologies to confirm the comparative evaluation metrics of the assigned KPI. Customizable factors are extracted and mapped for the design structure matrix and the analytic hierarchy processes. Reconfiguration event information is visualized as bill of resource. Evaluation format of KPI choice is then suggested. The reconfiguration control manager is designed to extract and combine the objects and the resource library of the reconfigurable assembly module and line. This paper first proposes the improved evaluation modeling frame and format with the newly refined KPI for the assessment of reconfiguration adaptability. Second, it shows the applicable suitability through a partly designed domain at the real automotive components manufacturing and assembly factory. Finally, it discusses the issues related with the customization and case results by the suggested evaluation methods.
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