• Title/Summary/Keyword: Missle

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Modal synthesis of missle autopilot control law (미사일 자동 조종 제어 법칙의 형태합성)

  • 박노웅;배준경;박종국
    • 제어로봇시스템학회:학술대회논문집
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    • 1987.10b
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    • pp.547-549
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    • 1987
  • The purpose of this paper is to present an efficient and practical method for a Hissle autopilot design problem. The method emphasizes on the use of a modern design technique to classical flight control specifications and the trade-off between dynamic performance and robustness of the Missle autopilot control system.

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Design of the kalman filter for transfer alignment of strapdown inertial navigation system (스트랩다운 관성항법장치의 초기정렬 전달 칼만필터 설계)

  • Chung, Tae-Ho;Song, ki-Won;Jeon, Chang-Bae;Lyou, Joon
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.142-146
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    • 1991
  • In order to develope transfer alignment algorithm which achieves accurate initial alignment of slave strapdown inertial navigation system(SDINS) of a missle using master SDINS of mobile launchers third-order suboptimal filter is constructed to estimate the transformation matrix between two SDINS coordinates. In Kalman Filter formulation, the measurement equation uses that of accelerometer when stationary, and is replaced by that of gyroscope when elevating the missle. This switching method is applied to increase the degree of observability and to remove the error generated by lever arm effect. Simulation results show that the azimuth transfer error is about 0.3 mrad, and confirm that this scheme has a potential for real application.

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A Study on the Decsion of Aircraft Demand for Air to Surface Mission (공대지임무의 항공기 소요 판단에 관한 연구)

  • 박재규;김충영
    • Journal of the military operations research society of Korea
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    • v.22 no.2
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    • pp.141-152
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    • 1996
  • Currently, North Korea is increasing strategic weapons such as MIG-29, SUCD missle, Nodong #1 missle, etc. This paper focuses on developing the deciding the number of aircraft required for air to surface mission against strategic targets in North Korea. The model is developed under assumptions that weapon types of aircrafts are known and killing probabilities in each case can be estimated. The model is derived on the basis of the TAIM(Theater Air Interdiction Model) which is used in DOD of U.S.A. We utilizes recursive linear programming and dynamic technique in the model in order to solve aircraft allocations for strategic targets which are provided in day time basis. The required number of aircrafts can be obtained from the model output. Finally an example problem is solved using techniques developed in the paper.

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A COMPARISON STUDY OF WIND TUNNEL TEST AND AERODYNAMIC ANALYSIS FOR TARGET DRONE (무인비행체 풍동시험과 공력해석의 비교 연구)

  • Kim, H.I.;Kim, J.S.;Lee, S.M.;Kim, K.T.;Kim, M.K.
    • 한국전산유체공학회:학술대회논문집
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    • 2010.05a
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    • pp.17-20
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    • 2010
  • An aerial target system is used for the purpose of experimental test and fire training of missile that newly developed and in mass production. Since the target drones of aerial target systems are monopolized by several major countries so that they are selling at a high price. In this paper, we present the CFD simulation results on a new target drone that Kyungan co. ltd is developing with their own technologies. The presented CFD simulation was conducted in the same conditions of a wind tunnel tests and we could obtain the simulation results of the lift and drag values were in errors by less than 15 percent compared to the experiment. The simulation results were used to determine the modified shapes of new prototype target drone that could fly safely.

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A study onthe stability of a missile body ina simplified model by finite element method (유한요소법에 의한 단순화된 미사일 몸체 모델의 안정성에 관한 연구)

  • ;;Kim, Chan Soo
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.5 no.4
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    • pp.293-302
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    • 1981
  • In this paper, the stability of a flexible missle, idealized as a free-free beam, is evaluated by using the finite element method. For the study, heavy machinery part is modeled as a concentrated mass and the thrust, which is controlled by a feedback sensor located at a predetermined position, is considered as a constant follower force. The aerodynamic forces, the structural damping, the cross sectional variation servo lag effect are neglected in this study. With unconstrained variational principle, the finite element method is applied to the nondimensionalized beam eqution. The matrix eigenvalue equation is obtained and the eigenvalues are calculated by a computer for the stability analysis. The stability is evaluated by the inspection of the eigenvalues are calculated by a computer for the stabilith analysis. The stabilith is evaluated by the inspection of the eigenvalues of the problem. For the study, the behaviors of the eigenvalues at various thrusts and the effects of the magnitudes and positions of the concentrated mass and directional control constant are analyzed.

Database Schema Design for Integrated Missile Design and Optimization (유도무기 통합최적설계를 위한 데이터베이스 설계 연구)

  • Lee, Jae-Woo;Lee, Seung-Jin;Choi, Seok-Min;Cho, Guk-Hyun;Kim, Kwang-Sik;Lee, Jeong-Oog;Jung, Karp-Joo
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.21 no.6
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    • pp.563-569
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    • 2008
  • In this paper, the missile database system for the multidisciplinary design and optimization framework has been designed and investigated. The requirements of the missiles database are analyzed and the database design concept has been defined first. The data flow among the analysis disciplines is investigated and the Entity-Relation diagram is constructed to develop the database table and to define the database schema. The developed database system is integrated into the missile design framework to perform the store, search and management of the design data during the design and analysis of the missile development, hence the efficiency and validity of the database designed in this study has been demonstrated.

ROKN's Response Strategy to North Korea's SLBM Threat (북한 SLBM 위협과 대응방향)

  • Moon, Chang-Hwan
    • Strategy21
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    • s.40
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    • pp.82-114
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    • 2016
  • The purpose of this article is to analyze the progress of North Korea's SLBM threat, and to assess the technological capacity and threat level of its SLBMs. Currently, North Korea has approximately 1000 ballistic missiles, such as the SCUD, Musudan, and Nodong, in stock. This article pays close attention to the background and strategical implication behind North Korea's obsession with developing SLBMs despite possessing sufficient means to launch provocations with its current arsenal of ground based ballistic missiles and conventional weapons. Based on the abovementioned analysis, this article will recommend possible response directions for the ROK Armed Forces to North Korea's SLBM threat. It is highly difficult to detect SLBMs due to its stealthy nature, as it is launched underwater after covert infiltration. North Korea's SLBM is considered a game changer in that even one SLBM can significantly change the strategic balance of North East Asia. North Korea's SLBM test launch in August has made a 500km flight, landing 80km inside the JADIZ (Japan Air Defense Identification Zone), and as such, it is assessed that North Korea already possesses underwater ejection and cold launch capabilities. The most realistic response to North Korea's imminent SLBM threat is bolstering anti-submarine capabilities. ROK Armed Forces need to upgrade its underwater kill-chain by modernizing and introducing new airborne anti-submarine assets and nuclear-powered submarines, among many options. Moreover, we should integrate SM-3 missiles with the Aegis Combat system that possess strong detection capabilities and flexibility, thereby establishing a sea-based Ballistic Missle Defense (BMD) system centered around the Aegis Combat System, as sea-based ballistic missile threats are best countered out in the seas. Finally, the capabilities gap that could arise as a result of budgetary concerns and timing of fielding new assets should be filled by establishing firm ROK-US-Japan combined defense posture.

Heat Source Identification Technique of Aircraft and Flare using 2-color Detectable Infrared Sensors (복수 대역 감지 적외선 센서를 이용한 항공기와 플레어의 열원 식별 기술)

  • Lee, Dong-Si;Lee, Kee-Keun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.7
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    • pp.1031-1039
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    • 2015
  • Present guided missiles are equipped with infrared seeker to find the infrared sources radiating from target plane and then chase, which results in an improvement of the hitting success rate when in striking target objects. To interrupt the chases from the guided missile, the target plane spreads the flare, avoiding the missile attracts. Our research is to develop a 2-color infrared identification technique to discern the flare and real thermal source from target plane. Considering flare radiation properties and EM atmosphere transmission rates, two channels were selected, in which main channel (MC) was in a range of 3.7 μm∼4.8 μm and auxiliary channel (AC) in 1.7 μm∼2.3 μm. A 2500K heat source was used for an artificial flare source, while a 570K heat source was utilized for airplane infrared source in experimental testing. Two infrared sensors detectable only at each chanel were employed in order to measure the voltage ratio from two channels, identifying the flare and real target plane via comparison the voltage ratio. Several experimental conditions were imported in order to prove that our proposed 2-color infrared identification technique is very efficient way to discern heat sources from aircraft and flare, demonstrating that our proposed technique is very promising means for our force’s InfraRed Counter Counter Measure (IRCCM) in order to countermeasure opposite force’s InfraRed Counter Measures (IRCM).

A Study on Development of the Dual-thrust Flight Motor for Enhancing the Hit Probability (명중률 향상을 위한 이중추력형 비행모터 개발에 대한 연구)

  • Kim, Hanjun;Kim, Eunmi;Kim, Namsik;Lee, Wonbok;Yang, Youngjun
    • Journal of the Korean Society of Propulsion Engineers
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    • v.18 no.4
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    • pp.74-80
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    • 2014
  • This paper describes the development of the dual-thrust flight motor for enhancing the hit probability of unguided rockets. We designed dual-thrust flight motor by shape modification of the double base propellant with high burning rate, and confirmed the dual-thrust performance by static firing tests. The test results showed the thrust ratio of about 1:7.6 between sustaining phase and boosting phase, and had a quietly normal dual-thrust characteristics. And the results showed that there was not the fire extinction phenomenon of propellant due to the pressure drop.