• Title/Summary/Keyword: Military Airborne

Search Result 45, Processing Time 0.022 seconds

Study on the Tx/Rx Beam Performance of Planar Active Phased Array Antenna for Airborne as using the Near-field Measurement (근접전계 시험을 이용한 항공기용 평면형 능동 위상 배열 안테나 송수신 빔 성능 검증에 관한 연구)

  • Kim, Young-Wan;Lee, Jaemin;Lee, Yuri;Kim, JongPhil;Park, Jong-Kuk;Park, Kyuchul;Kim, Sunju
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.21 no.1
    • /
    • pp.61-68
    • /
    • 2018
  • In this paper, we described about methods and results to verify the Tx/Rx beam characteristics of a planar active phased array antenna as using a near-field measurement. The near-field system can effectively measure multiple beams and predict the performance degradation due to the partial failure of individual elements. Also, it can accurately predict the EIRP relating to detection performance of the active phased array radar. We briefly described the near-field measurement method to verify the Tx/Rx beam characteristics, and then verified the effectiveness of measurement method by analyzing the measured results.

The Development of Air Escort Tactics for High-Value Airborne Assets Using Manned-Unmanned Teaming and the Study on Effective Force Disposition Using M&S (유무인 협업을 활용한 고가치 공중 자산의 호위 전술 개발과 M&S를 활용한 효과적인 전력배치 방안 연구)

  • Park, Myunghwan;Yoo, Seunghoon;Oh, Jihyon;Seol, Hyeonju
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.25 no.4
    • /
    • pp.401-411
    • /
    • 2022
  • As the role of high-value air assets(e.g., AWACS, JSTARS, Rivet Joint, E-2) becomes more critical in modern warfare, the air escort for these assets blocking attacks from any potential enemy fighter also becomes vital. Without the escort, the operations of the assets become restricted. However, such an escort is not always possible due to the limited flight time of the escort fighters. In this paper, we introduce an escort tactics for high-value air assets performed by the manned-unmanned teaming composed of a transport aircraft and UAVs(unmanned aerial vehicles). In this tactics, the transport aircraft plays the role of an aircraft carrier, which carries, launches, and retrieves the UAVs. The missions of UAVs in this tactics are to detect and engage enemy fighters. We also introduce the simulation result of this tactics to identify the UAVs' required capabilities and optimal maneuvering.

Development of Unmanned Aerial Vehicle System Integration Laboratory(UAV SIL) for the Integrated Verification (무인항공기 체계의 통합검증을 위한 무인항공기 체계통합실험실(UAV SIL) 개발)

  • Jae Ick Shim;Hee Chae Woo;Sang Jin Kim;Sang Jun Jung
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.27 no.1
    • /
    • pp.70-79
    • /
    • 2024
  • This paper describes the results of the development of the the unmanned aerial vehicle system integration laboratory(UAV SIL) for the integrated verification. This UAV SIL is designed to test the robustness of the UAV system including the operational logics and the flight control system behaviors under many abnormal and emergency conditions such as data-link losses, airborne subsystem failures, engine shut down conditions, and ground control station faults. This paper presents how to build the UAV SIL and how to verify the in-development UAV system through the UAV SIL.

Ground Test & Evaluation of an Unmanned Aerial Vehicle

  • Kim, Jinhyoung;Jinyoung Suk;Kim, Ilsik
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 2002.10a
    • /
    • pp.47.6-47
    • /
    • 2002
  • UAV(Unmanned Aerial Vehicle) has become one of the most popular military/commercial aerial robots in the new millenium. In spite of all the advantages that UAVs inherently have, it is not an easy job to develop a UAV because it requires very systematic and complete approaches in full development envelop. The ground test & evaluation phase has the utmost importance in the sense that a well developed system can be best verified on the ground. In addition, many of the aircraft crashes in the flight tests were resulted from the incomplete development procedure. In this research, a verification procedure of the whole airborne integrated system was conducted including the flight management sys...

  • PDF

Priority Based Medium Access Control and Load Balancing Scheme for Shared Situational Awareness in Airborne Tactical Data Link (공중 전술 데이터링크에서 상황인식 공유를 위한 우선순위 기반 매체접속제어와 부하분산 기법)

  • Yang, Kyeongseok;Baek, Hoki;Park, Kyungmi;Lim, Jaesung;Park, Ji Hyeon
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.41 no.10
    • /
    • pp.1210-1220
    • /
    • 2016
  • As modern warfare has changed into network centered, the ability to share situational awareness among allies become a core competency for performing operational missions. In an airborne environment, it uses a tactical data link such as Link-16 for shared situational awareness. There exist problems when it shares situational awareness over the existing data link that can not allocate slots dynamically or that can not change the number of a slot to be allocated. In addition, there was a problem that can not share this failure so that failed to improves situation awareness because of finite time slot resources. In this paper, we accommodate dynamic slot allocation and changes of slot allocation with mixed structure of TDMA (time division multiple access) and random access. We propose a technique that can be used when available slots are exhausted, and a load balancing method to prevent slot allocation delay when slot requesting or message sending is concentrated on a single subframe.

Air Transport Rack Design and Temperature Test Study for UAV (무인항공기용 ATR 설계 및 온도시험에 관한 연구)

  • Kim, Sung-Su;Kim, Do-Yul;Choi, Kee-Young;Park, Choon-Bae
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.35 no.3
    • /
    • pp.253-259
    • /
    • 2007
  • Standard design and suitable environmental test method should be applied to increase the reliability of UAV flight control systems. UAV flight control systems under development domestically have enough capabilities for complicated missions. However, most low cost systems are not designed with concepts of compatibility, adaptability, and environmental compliance. This paper explains ATR(Air Transport Rack) standard that is widely used on aircraft. The paper presents a design uses commercial off-the-shelf parts. The paper also presents various environmental standards for airborne equipments, including U.S. military specifications. The developed FCS was tested under these specifications. The paper shows the test procedures and results.

Trends and Prospects of N. Korea Military Provocations After the Sinking of ROKS Cheon-an (천안함 폭침 이후 북한의 군사도발 양상과 전망)

  • Kim, Sung-Man
    • Strategy21
    • /
    • s.34
    • /
    • pp.58-92
    • /
    • 2014
  • Even after S. Korea took 5.24 Measure(24 May 2014), N. Korea has not stopped raising provocations such as the shelling of Yeonpyeong Island, electronic and cyber attacks. To make matters worse, the communist country lunched long-range missiles(twice) and conducted 3rd nuclear test, escalating tensions which could possibly lead to an all-out war. Korean Government failed to respond properly. However, escalation into an all-out war was deterred by the CFC immediately carrying out its peacetime duty(CODA). The US made a rapid dispatch of its augmentation forces(Aircraft carrier, nuclear-powered submarine, strategic bomber, F-22) to the Korean Peninsula. In recognition of the importance of the Combined Forces Command, since May 2013 the Park Geun-Hye Administration has been pushing ahead with re-postponement of Wartime Operational Control Transfer(which initially meant the disassembling of the CFC as of 1 December 2015) More recently, there has been a series of unusual indicators from the North. Judging from its inventory of 20 nuclear weapons, 1,000 ballistic missiles and biochemical weapons, it is safe to say that N. Korea has gained at least war deterrence against S. Korea. Normally a nation with nuclear weapons shrink its size of conventional forces, but the North is pursuing the opposite, rather increasing them. In addition, there was a change of war plan by N. Korea in 2010, changing 'Conquering the Korean Peninsula' to 'Negotiation after the seizure of the Greater Seoul Metropolitan Area(GSMA)' and establishing detailed plans for wartime projects. The change reflects the chain reaction in which requests from pro-north groups within the South will lead to the proclamation of war. Kim, Jeong-Un, leader of N. Korean regime, sent threatening messages using words such as 'exercising a nuclear preemptive strike right' and 'burning of Seoul'. Nam, Jae-June, Director of National Intelligence Service, stated that Kim, Jung-Un is throwing big talks, saying communization of the entire Korean Peninsula will come within the time frame of 3 years. Kim, Gwan-Jin, Defense Minister, shared an alarming message that there is a high possibility that the North will raise local provocations or a full-fledged war whenever while putting much emphasis on defense posture. As for the response concept of the Korean Government, it has been decided that 'ROK·US Combined Local Provocation Counter-Measure' will be adopted to act against local provocations from the North. Major provocation types include ▲ violation of the Northern Limit Line(NLL) with mobilization of military ships ▲ artillery provocations on Northwestern Islands ▲ low altitude airborne intrusion ▲ rear infiltration of SOF ▲ local conflicts within the Military Demarcation Line(MDL) ▲ attacking friendly ships by submarines. Counter-measures currently established by the US involves the support from USFK and USFJ. In order to keep the sworn promise, the US is reinforcing both USFK and USFJ. An all-out war situation will be met by 'CFC OPLAN5027' and 'Tailored Expansion Deterrence Forces' with the CFC playing a central role. The US augmentation forces stands at 690,000 troops, some 160 ships, 2,000 aircraft and this comprise 50% of US total forces, which is estimated to be ninefold of Korean forces. The CFC needs to be in center in handling both local provocations and an all-out war situation. However, the combat power of S. Korean conventional forces is approximately around 80% of that of N. Korea, which has been confirmed from comments made by Kim, Gwan-Jin, Defense Minister, during an interpellation session at the National Assembly. This means that S. Korean forces are not much growing. In particular, asymmetric capabilities of the North is posing a serious threat to the South including WMD, cyber warfare forces, SOF, forces targeting 5 Northwestern Islands, sub-surface and amphibious assault forces. The presence of such threats urgently requires immediate complementary efforts. For complementary efforts, the Korean Government should consider ① reinforcement of Korean forces; putting a stoppage to shrinking military, acquisition of adequate defense budget, building a missile defense and military leadership structure validity review, ② implementation of military tasks against the North; disciplinary measures on the sinking of ROKS Cheon-an/shelling of Yeonpyeong Islands, arrangement of inter-Korean military agreements, drawing lessons from studies on the correlation between aid for N. Korea, execution of inter-Korean Summit and provocations from the North, and ③ bolstering the ROK·US alliance; disregarding wartime operational control transfer plan(disassembling of CFC) and creation of a combined division.

GMTI Two Channel Raw Data Processing and Analysis (GMTI 2채널 원시데이터 처리 및 분석)

  • Kim, So-Yeon;Yoon, Sang-Ho;Shin, Hyun-Ik;Youn, Jae-Hyuk;Kim, Jin-Woo;You, Eung-Noh
    • Korean Journal of Remote Sensing
    • /
    • v.34 no.6_1
    • /
    • pp.847-855
    • /
    • 2018
  • GMTI (Ground Moving Target Indicator) is a kind of airborne radar function that is used widely in military applications to detect the moving targets on the ground. In this paper, GMTI signal processing technique was presented and its performance was verified using sum and difference channels raw data obtained by the captive flight test.

X-band Pulsed Doppler Radar Development for Helicopter (헬기 탑재 X-밴드 펄스 도플러 레이다 시험 개발)

  • Kwag Young-Kil;Choi Min-Su;Bae Jae-Hoon;Jeon In-Pyung;Hwang Kwang-Yun;Yang Joo-Yoel;Kim Do-Heon;Kang Jung-Wan
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.17 no.8 s.111
    • /
    • pp.773-787
    • /
    • 2006
  • An airborne radar is an essential aviation electronic system for the aircraft to perform various civil and/or military missions in all weather environments. This paper presents the design, development, and test results of the multi-mode X-band pulsed Doppler radar system test model for helicopter-borne flight test. This radar system consists of 4 LRUs(Line-Replacement Unit), which include antenna unit, transmitter and receiver unit, radar signal & data processing unit and display Unit. The developed core technologies include the planar array antenna, TWTA transmitter, coherent I/Q detector, digital pulse compression, MTI, DSP based Doppler FFT filter, adaptive CFAR, moving clutter compensation, platform motion stabilizer, and tracking capability. The design performance of the developed radar system is verified through various ground fixed and moving vehicle test as well as helicopter-borne field tests including MTD(Moving Target Detector) capability for the Doppler compensation due to the moving platform motion.

Correction of Aircraft Empty Weight CG due to LRU Modification (구성품 변경에 따른 항공기 공허중량 무게중심 수정 및 검증)

  • Lee, Jin-Won;Kwon, Na-Eun;Kim, Ji-Hong;Park, Jae Hyun
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.50 no.8
    • /
    • pp.551-557
    • /
    • 2022
  • LRU (Line Replacement Unit) modifications are often required for military aircraft due to aging. Recently, LRU modifications were proceeded for KA-O (Armed Airborne Controller) by replacing the ejection seat and adding avionic equipment, which made the aircraft's operational CG (Center of Gravity) on fuel consumption curve become out of the range of the specification requested. The off-ranged CG should be corrected by introducing an appropriate method. This study proposes a procedure for revising and verifying the empty weight CG altered due to LRU modification for small military aircraft (e.g., KA-O). In the proposed method, first, the change of empty weight CG of KA-O due to the LRU modifications is comprehensively examined. Then, several ballast masses are added to the engine mount strut to restore the empty weight CG on the fuel consumption curve to a safe operational range. The installations are verified via stress and fatigue analysis for various operating conditions. Considering that open information is not very available for the revision of empty weight CG, this study is valuable because it presents an established procedure for correcting and verifying empty weight CG during aircraft modification.