• 대한전자공학회논문지SP
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• 제49권1호
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• pp.119-127
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• 2012

본 논문은 밀리미터파 탐색기 신호처리장치의 개발 및 시험에 대하여 기술한다. 지대공미사일은 표적의 종류 및 상황에 따라 다양한 송신파형이 요구되기 때문에 유연성을 고려한 하드웨어, 소프트웨어 설계를 하였다. 본 신호처리장치는 ADC, FPGA, DSP 및 기타 소자들로 구성된다. FPGA는 DSP에 연동 인터페이스를 제공하고, 중간주파수 신호를 기저대역신호로 변환한다. DSP는 신호처리, 표적정보계산 및 장치제어를 수행한다. 각 부품은 하드웨어적으로 직렬로 연결되며, 다양한 송신파형에 대한 신호처리 알고리즘은 병렬로 연결되어있다.

• 한국군사과학기술학회지
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• 제19권2호
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• pp.185-194
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• 2016

It is essential for generating the synthetic image to test and evaluate a guided missile system in the hardware-in-the-loop simulation. In order to make the evaluation results to be more reliable, the extent of fidelity and rendering performance of the synthetic image cannot be left ignored. There are numerous challenges to simulate the LWIR sensor signature of sea surface depending on the incident angle, especially in the maritime environment. In this paper, we investigate the key factors in determining the apparent temperature of sea surface and propose the approximate formula consisting of optical characteristics of sea surface and sky radiance. We find that the greater the incident angle increases, the larger the reflectivity of sea surface, and the greater the water vapor concentration in atmosphere increases, the larger the amount of sky radiance. On the basis of this information, we generate the virtual maritime environment in LWIR region using the SE-WORKBENCH, physically based rendering software. The margin of error is under seven percentage points.

• 전기학회논문지
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• 제61권7호
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• pp.1041-1048
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• 2012

We display important test information from radar, telemetry in real time for monitoring and control of guided missile flight test. Clearing test area is the most important thing for safety. Thus, we have to constantly monitor and control ships around the test area. Several maritime surveillance radars are deployed around the test area for that purpose. However, multiple points are displayed for the same target when using multiple surveillance radars and this confuses the test personnel during the mission. In this paper, we suggested a method to solve this problem by analyzing error factor of surveillance radar and comparing the correlation of each radar data.

• 한국항공우주학회지
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• 제41권5호
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• pp.383-390
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• 2013

유도탄의 사출성능 중 탄에 충격으로 작용하는 최대가속도의 감소는 유도탄의 비정상작동 방지와 내부 부품들의 크기 및 비용 감소 측면에서 매우 중요하다. 본 연구에서는 사출용 가스발생기의 작동에 의해 탄에 가해지는 최대가속도가 사출초기에 발생됨을 착안하여 사출초기에 영향을 미치는 설계인자를 조사하였다. 가스발생기 설계인자로 점화기 및 노즐마개를 선정하고, 설계인자 변경을 통해 가스발생기에 의해 발생되는 최대가속도를 실험적으로 조사하였다. 최종적으로 최대가속도 감소효과를 정량적으로 비교하기 위해 가스발생기 지상연소시험을 실시하였다. 그 결과 설계인자의 최적값들이 적용된 개선모델의 경우 기준모델에 비해 최대가속도를 약 68% 줄일 수 있음을 확인하였다.

• 한국군사과학기술학회지
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• 제25권4호
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• pp.355-363
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• 2022

Development of supersonic flying vehicle is one of the most latest issue in modern military technology. Specifically, structural integrity of supersonic flying vehicle can be verified by high temperature structural test. High temperature structural test is required to consider thermal load caused by aerodynamic heating while applying structural load simultaneously. Tubular quartz lamps are generally used to generate thermal load by emitting infrared radiation. In this study, modified heat flux model of tubular quartz lamp is proposed based on existing model. Parameters of the proposed model are optimized upon measured heat flux in three dimensions. Finally, thermal load of plate specimen is designed by the heat flux model. In conclusion, it is possible to predict heat flux applied on plate specimen and desired thermal load of high temperature structural test can be obtained.

• 한국군사과학기술학회지
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• 제26권3호
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• pp.273-280
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• 2023

Recently electronic safety and arming device(ESAD) has attracted increasing attention due to its design flexibility. However, ESAD can be armed unintentionally due to a malfunction of an external device or interface. Thus ESAD needs an internally generated arming signal independent from the external device. In this paper, a new sensor-hybrid ESAD(SHESAD) with a flight environment sensing function for generating arming signal internally is proposed and a sled test based method is also suggested for evaluating its functions. Through the test results, the operability of the flight environment sensing function was confirmed. Also, it is shown that the proposed test method is suitable for verification of ESAD with the flight environment sensing function.

• 한국군사과학기술학회지
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• 제25권2호
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• pp.160-168
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• 2022

The new IFF mode, Mode-5 replacing Mode-4, has already been established by the US DoD for its allies and NATO forces. A IFF retrofit program for replacing the Mark XII Mode-4 with Mark XIIA Mode-5 is in progress in order to overcome the security limitations of the former in R.O.K. IFF certification test for the new mode, Mode-5, has been performed on medium range surface to air missile platform of the Korean armed forces for the first time in R.O.K and this is regarded as a monumental event in Korean defense industry. The present paper is a discussion on the procedures applied to the IFF system retrofit and integration, lessons learned from AIMS test with the US AIMS PO as observer. The minimum modification from the existing Mark XII Mode-4 to Mark XIIA Mode-5 and evolutional adaption from previous design including interoperability are required for the system retrofit. Letter of Certification was received from the US AIMS PO after the tests. The authors propose that the lessons learned and know-how acquired during the tests are managed by the R.O.K Government as the standard structure of a database. It is expected that the use of the database will reduce the developmental difficulties and risk, also increase efficiency in future developments and other projects.

• 한국산학기술학회논문지
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• 제17권12호
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• pp.193-197
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• 2016

현재 국내 유도무기 사격시험의 경우, 유도무기 사격 수량 대비 명중 수량으로 계산된 명중률만을 이용하여 국내 유도무기의 성능을 판단하고 있다. 명중률만으로는 생산된 유도무기 전체의 특성을 표현하지 못하므로 유도무기 사격시험결과에 따라 계산된 명중률을 활용하여 생산된 모든 유도무기의 성능을 판단하기에는 한계가 있다. 다시 말하면, 전력화되어 운용 중인 유도무기 또는 생산중인 유도무기의 명중률을 일정 수준 보장하기 위해서는 유도무기 사격시험 결과에 따라 계산된 단순 명중률보다 신뢰성이 높은 신뢰수준을 산정하는 것이 필요하다. 이에 따라 본 연구에서는 생산 수량이 적고, 고가이며, 유도무기 사격 시험을 수행하기 전에 유도무기 명중 여부 및 성능을 확인할 수 없는 유도무기 사업 특성을 고려하고, 유도무기 사업 특성에 적합한 초기하분포와 베이지안 규칙을 활용하여 최소 사격 수량으로 유도무기 신뢰수준을 산정하는 방법을 소개한다. 또한, 국내 유도무기 사격시험 결과 및 국내외 문헌을 활용하여 국내 유도무기 사격 시험 결과 판정 시 유도무기 성능을 확인할 수 있는 적정 신뢰수준을 제안한다.

• 한국군사과학기술학회지
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• 제14권4호
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• pp.622-629
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• 2011

In this paper, you can see the structure of data slaving software module that is in use on flight test and result of the test with the slaving. The data slaving software module has many functions, data slaving for various instrumentation systems(instrumentation radars, telemetry systems for missile, aircraft and so on), setting some slaving group for multi-target, communicating with the instrumentation systems in a far away site and sending a specific value as slaving data. This fits the requests for flight test that is being performed and improves performance of the instrumentation systems.

• 한국군사과학기술학회지
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• 제6권1호
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• pp.39-48
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• 2003

A GPS translator system is used to get the precise and reliable trajectory data for the high dynamic test vehicles, such as missiles or artillery shells. The missile system with high dynamics, vibration and shock needs to determine its position and velocity in particular. The proposed GPS translator on the test vehicle receives GPS signals, amplifies, down-converts, digitally samples, BPSK modulates, up-converts them to S-band, and then retransmits them to the ground translator processing station. It has doppler variation and signal noise, so design method for resolving them is proposed. The performance of the translator is proved by environmental test and real flight test.