• Title/Summary/Keyword: 활공탄

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Ground Ejection Tests for the Safe Separation Analysis of a Gliding Bomb (활공탄의 안전분리 해석을 위한 지상투하시험)

  • Lee, Kidu;Lee, Inwon;Park, Youngkun;Baek, Seungwoock;Jung, Nahyeon;Jung, Sangjun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.41 no.6
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    • pp.502-508
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    • 2013
  • Various combinations of cartridge and orifice were applied for ground ejection tests of a gliding bomb model equipped with a new guidance kit. Larger diameter of orifice made larger ejection force at each of bomb racks. Normal operations of the wing deploying mechanism and the devices inside of the bomb model were confirmed. Also high speed video data showed that pitch angle of the gliding bomb varied due to the ejection force.

Development of Flight Control System for Gliding Guided Artillery Munition - Part I : Operational Concept and Navigation (유도형 활공 탄약 비행제어시스템 개발 Part I : 운용 개념 및 항법)

  • Lim, Seunghan;Pak, Changho;Cho, Changyeon;Bang, Hyochoong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.42 no.3
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    • pp.221-228
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    • 2014
  • In this paper, the operational concept and the navigation algorithms for the gliding guided artillery munition are studied. The gliding guided artillery munition has wings for gliding; therefore spin of the munition should be eliminated. The previous navigation algorithms assumed a spinning munition with constant angular velocity; hence, they cannot be applied for the gliding munition. Moreover, lateral stability becomes worse due to decrease of angular momentum. Therefore, side force should be controlled to improve the stability, and the munition should maneuver, then the previous navigation algorithms for typical fixed-wing aircraft cannot be applied. In this paper, we apply the previous navigation algorithms for the spinning munition. Spin is eliminated and wings are deployed based on the estimation results, and the advanced navigation algorithm for the non-spinning munition is introduced.

Development of Flight Control System for Gliding Guided Artillery Munition - Part II : Guidance and Control (유도형 활공 탄약 비행제어시스템 개발 Part II : 유도 및 제어)

  • Lim, Seunghan;Pak, Changho;Cho, Changyeon;Bang, Hyochoong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.42 no.3
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    • pp.229-236
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    • 2014
  • In this paper, the guidance laws and controllers for the gliding guided artillery munition is studied. The gliding guided artillery munition has wings for gliding to increase a range; therefore previous guidance laws and controllers for the guided munition could not be applied. Concepts of vector field guidance and proportional navigation guidance are applied for mid-term and terminal guidance, respectively. The gliding guided artillery munition is operated within wide altitude and speed areas; therefore, the controllers are designed for each area, and gain-scheduling and the linear interpolation technique is applied to compute the appropriate gains.

Tests of a Guidance Kit for Air-to-Surface Bomb (공대지 폭탄용 유도키트 시험)

  • Lee, Inwon;Lee, Kidu;Park, Youngkuen;Lim, Sangsoo;Baek, Seungwoock;Lee, Daeyearl
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.41 no.4
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    • pp.314-318
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    • 2013
  • Tests and evaluations following the U.S. MIL-HDBK/STANDARD were successfully conducted to assure the performance of the air-to-surface guidance kit which was developed first in Korea. Various ground tests confirmed the operation capability and reliability of the guidance kit, and flight tests proved very good mid-range gliding performance and accuracy of the gliding bomb which was a general purpose bomb with the guidance kit.

Fluid-Structure Interaction Analysis of High Aspect Ratio Wing for the Prediction of Aero-elasticity (유체-구조 연계 해석기법을 이용한 세장비가 큰 비행체 날개의 공탄성 해석)

  • Lee, Ki-Du;Lee, Young-Shin;Lee, Dae-Yearl;Lee, In-Won
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.6
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    • pp.547-556
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    • 2010
  • For the safety of aircraft and accuracy of bombs, many companies have researched the new concept of adaptive kit to flying-bombs. For the long distance flying, it's normally used deployed high-aspect ratio wing because of limited volume. The probabilities of large elastic deformation and flutter are increased due to decreased stiffness of high-aspect ratio wing. In this paper, computational fluid dynamics and computational structure dynamics interaction methodology are applied for prediction of aerodynamic characteristics. FLUENT and ABAQUS are used to calculate fluid and structural dynamics. Code-bridge was made base on the compactly supported radial basis function to execute interpolation and mapping. There are some differences between rigid body and fluid-structure interaction analysis which are results of aerodynamics characteristics due to structural deformation. Small successive vibration was observed by interaction.

Development of guided weapon systems and the role of satellites (유도무기체계의 발전과 인공위성의 역할)

  • Hyun-seung Son;Kyung-won Oh
    • Journal of Aerospace System Engineering
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    • v.17 no.4
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    • pp.75-86
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    • 2023
  • The guided missiles and decoy systems that have been developed have been likened to a spear and shield. When a new attack system appears, another defense system is developed, and the attack system is once again upgraded to neutralize it. Now, due to the limitations of the decoy system, guided weapons have become the main force of both the defense and attack systems. Also, these systems have been expanded to use Space systems as a means of defending against a guided weapon system that is too fast for terrestrial-based systems. Induced weapon systems started at the sub-sonic level, and have become so important that their speeds have become super-sonic and hyper-sonic. The concept of Space has been included in the range of guided missiles, and satellite systems have become essential elements of guided missiles. Focusing on the correlation between the guided missile system and the satellite system, we analyze the characteristics of modern guided munitions and the direction of development of the guided weapons system.