• Title/Summary/Keyword: 회로 카드 조립체

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The study of PCB tester for improving productivity (생산성향상을 위한 회로카드조립체 시험장비에 관한 연구)

  • Lee, Sang-Myung;Kim, Young-Kil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.16 no.12
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    • pp.2808-2814
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    • 2012
  • The most of military systems that developed today are composed with many sub-systems for mission execution. The test of military systems for delivery test of mass product such that part test, PCB test, component test, integration test. Improving productivity is minimize testing item by man and minimize kind of tester, so that decrease product cost by production time for test. PCB tester be developed many kind of test method that systems were developed by many different engineers. This article studies testing check point for testing that how to minimize of kind of tester, how to automatic test for all of function that have inputs and outputs. Development of tester for improving productivity requires classify functional allocation of main system and sub system, sub system require PCB for functional allocation start on preliminary design period for reducing testing item and testing fixture.

The study of PCB Tester for improving productivity (생산성 향상을 위한 회로카드조립체 시험장비에 관한 연구)

  • Lee, Sang-Myung;Kim, Young-Kil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.05a
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    • pp.259-262
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    • 2012
  • The most of military systems that developed today are composed with many sub-systems for mission execution. The test of military systems for delivery test of mass product such that part test, PCB test, component test, integration test. This paper discusses improving productivity test method that functional test of PCB has a various function. Improving productivity is minimize testing item by man and minimize kind of tester, so that decrease product cost by production time for test. PCB tester be developed many kind of test method that systems were developed by many different engineers. This paper study testing check point for testing that how to minimize of kind of tester, how to automatic test for all of function that have inputs and outputs.

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Analysis of Causes PCB Failure for Collective Protection Equipment and Improvement of Quality (집단보호장비 내의 회로카드조립체 고장 원인 분석 및 품질 향상)

  • Pak, Se-Jin;Ki, Sang-Sik
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.5
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    • pp.87-92
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    • 2019
  • This study is the analysis of causes of printed circuit board (PCB) in collective protection equipment failure and quality improvement. The equipment is a component of the weapon system currently in operation and serves to defend against enemy chemical and biological attack as well as heating and cooling functions. However, during operation in the military, fans of condensate assembly failed to operate. The cause of the failure is the burning of PCB. It was found that the parts were heated according to the continuous cooling operation under the high temperature environmental conditions. Accordingly, the electronic components exposed to high temperature were deteriorated and destroyed. To solve this problem, PCB apply to heatsink. The performance test of improved PCB has been completed. Futhermore system compatibility, positive pressure maintenance and noise test were performed. This improvement confirmed that no faults have occurred in PCB so far. Therefore, the quality of the equipment has improved.

A Study on the Quality Improvment of PCB by Improving Power Consumption for Radar (레이더장비에 적용되는 통신 IC 소비전력 개선을 통한 회로카드조립체 품질 향상에 관한 연구)

  • Jo, Hee-Jin;Gwak, Hye-Rim
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.12
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    • pp.1-6
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    • 2018
  • This study examined the quality improvement of printed circuit boards (PCBs) in relation to the power consumption for radar. The radar examined is currently in production and being used by the military. The PCB converts 28 V DC to 5 V DC but frequently malfunctions. Therefore, cause analysis was carried out. As a result, the power consumed by a certain communication IC was very high, and the heat generated by the high power consumption caused damage to the surrounding parts. Accordingly, it was changed to an improved communication IC that meets all the radar system specifications. System tests were carried out for the changed communication IC to check the impact on the system, and environmental tests were performed, which proved that the performance required by the radar system is satisfactory. As a result of this improvement, there has been no history of failure in this PCB so far. Therefore, the quality of this PCB has been improved.

Design for improving the impact resistance of a vehicle equipped with the circuit card assembly (비행체 탑재 회로카드 조립체의 내충격 향상을 위한 설계)

  • Lee, Chang-Min;Kang, Dong-Suk;Shin, Young-Hoon;Lee, Ki-Sun
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2014.10a
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    • pp.48-53
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    • 2014
  • Rocket, held using the CCA for the mission, a plurality of recording devices, and navigation equipment. In case of a projectile which is entered the water after fired into the air, after performing stages and fairing separated in flight to enter the underwater. It is caused by the explosion of gunpowder mainly, vibration phenomenon of a large transition is induced structurally very, also on entering the water, have a significant shock structurally separated. If shock is transmitted directly to the CCA through the body, it can be caused malfunction of payloads, resulting in failure of the mission of the projectile. In order to ensure the stability against shock, in this paper, Calculating a target resonacne frequency of the CCA, and verified through modal test and analysis. Maximum acceleration position of CCA is checked by SRS analysis. In addition, effectiveness of shock isolation system through shock analysis.

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The Study on Design of Circuit Card Assembly on Servo Control Unit for Automated Resupply Vehicle K56 (K56 탄약운반장갑차용 서보제어기의 회로카드조립체 설계에 관한 연구)

  • Lee, Ju-Seung;Kim, Seong-Jin;Bae, Gong-Myeong;Kwon, Soon-Mo;Park, Hyean-Jo;Choi, Jun-Sok
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.12
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    • pp.102-109
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    • 2019
  • This paper describes the design of the circuit card assembly to eliminate the communication error on a servo control unit installed in the automated resupply vehicle K56. K56 is a weapon system that automates the supply and loading of ammunition on the K-55A1 self-propelled artillery. As the core item responsible for ammunition movement control, the servo control unit is required to have good communication stability and reliability, but the conventional unit has recognized a problem that communication error intermittently occurs, resulting in an emergency stop phenomenon. We analyzed the communication signal of the servo control unit and identified the failure cause of the circuit card assembly to solve this problem. In addition, the signal interference in data/address line of the circuit card assembly was confirmed through analysis of the failure cause, and redesigned to avoid the interference, such as adjustment of the distance between communication lines and position change. Finally, the proposed cause analysis and redesign were verified through the component of servo control unit and attachment test on K56. We expected these study results to be used as reference for the design of other similar items.

Designing Electronics for High Frequency Shock (고주파 충격에 의한 전자부품 고장 방지 설계)

  • Lee, Jong-Hak;Kang, Dong-Seok;Choi, Ji-Ho;Kang, Young-Sik;Lee, Chang-Min
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.25 no.10
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    • pp.700-706
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    • 2015
  • In this study, stability designing electronics mounted on launch vehicle for shock load(low/high frequency band) could be derived. For the low-frequency shock loads, CCA(circuit card assembly) has secured the structural integrity over the best natural frequency techniques. For the high-frequency shock load, the structural integrity could be ensured with applying device such as the insulation pad. When the EAR is applied, insulation effect of part application is good more than whole application.

A Study on Design for Reliability for the PBA of Warship based on Reliability Physics Analysis (신뢰성 물리학 분석 기반 함정탑재 PBA 신뢰성 설계에 대한 연구)

  • Cha, Jong-Han;Park, Kyoung-Deok;Lee, Ki-Won;Bak, Byeong-Ho;Kim, Hee-Earn;Kwon, Hyeong-Ahn
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.12
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    • pp.535-545
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    • 2019
  • The PBA of ship weapon system should be installed and operated under harsh environmental conditions and so it should be highly reliable to endure the mission profiles during its entire lifetime. In the case of PBA failure during operation, rapid maintenance is highly likely to be difficult due to problems such as supply of parts, which can have a devastating effect on the mission. In order to validate the reliability of PBA, a series of tests are performed with PBA samples, but they require time, testing facilities, samples, expenses and failure analysis if failed. The reliability of PBA is predicted on the basis of specifications such as MIL-HDBK-217F, but this specification does not take into account failure mechanisms for specific design details, environment and usage, interconnects and its characteristics that drive many failures of PBA in the field. Therefore, this study predicts the reliability of PBA using an RPA tool and proposes the RPA methodology as a validation process at the design stage. With RPA, it is now possible to achieve design validation including inherent failure mechanism, identification of weakest link, alternative design options, and test plan development.