신뢰성 물리학 분석을 활용한 수출형 K2전차 전장품 신뢰성 평가 사례연구
Case Study on Reliability Evaluation of Electronic Equipment of Export-type K2 Main Battle Tank via Reliability Physics Analysis
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In this study, a reliability physics analysis (RPA) is performed to evaluate the reliability of the principal electronic equipment for export-type K2 main battle tanks. The purpose of the RPA is to ensure the reliability of electronic equipment operating under the harsh environment and operational conditions of the Middle East. Based on the RPA results, the potential failure risk factors are identified in advance at the electronic equipment design stage, and whether the reliability target of a 5% failure probability over 10 years is achieved is evaluated. For the RPA, the harmonic vibration, shock, and temperature conditions of the STANAG standard are applied. In particular, CFD analysis inside the K2 main battle tank crew room and a conjugated heat transfer analysis of the electronic equipment are performed to obtain the temperature data of PCB devices under Middle Eastern environmental conditions. A reliability analysis of solder fatigue, PTH fatigue, shock, and harmonic vibrations in harsh Middle Eastern environments for existing products is performed, based on which many potential problems are identified. Subsequently, the overall reliability is improved by referring to supplementary measures for solving problems derived from existing products in a detailed preliminary prototype design. In the next stage, the completed detailed prototype design faithfully addresses the problems identified in the preliminary prototype reliability analysis, thus satisfying the target life with a failure probability of 5% over 10 years. In the future, we shall conduct an accelerated life test until an actual failure occurs and obtain the life data of the electronic equipment to analyze the cause of failure.
Abstract
In this study, a reliability physics analysis (RPA) is performed to evaluate the reliability of the principal electronic equipment for export-type K2 main battle tanks. The purpose of the RPA is to ensure the reliability of electronic equipment operating under the harsh environment and operational conditions of the Middle East. Based on the RPA results, the potential failure risk factors are identified in advance at the electronic equipment design stage, and whether the reliability target of a 5% failure probability over 10 years is achieved is evaluated. For the RPA, the harmonic vibration, shock, and temperature conditions of the STANAG standard are applied. In particular, CFD analysis inside the K2 main battle tank crew room and a conjugated heat transfer analysis of the electronic equipment are performed to obtain the temperature data of PCB devices under Middle Eastern environmental conditions. A reliability analysis of solder fatigue, PTH fatigue, shock, and harmonic vibrations in harsh Middle Eastern environments for existing products is performed, based on which many potential problems are identified. Subsequently, the overall reliability is improved by referring to supplementary measures for solving problems derived from existing products in a detailed preliminary prototype design. In the next stage, the completed detailed prototype design faithfully addresses the problems identified in the preliminary prototype reliability analysis, thus satisfying the target life with a failure probability of 5% over 10 years. In the future, we shall conduct an accelerated life test until an actual failure occurs and obtain the life data of the electronic equipment to analyze the cause of failure.
참고문헌 (15)
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