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채종영(Jongyoung Chae),김명구(Myoung-Gu Kim),조종두(Chongdu Cho),유일용(Ilyoung Yu),이승수(Seungsu Lee),이용산(Yongsan Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
For the existence of a electron-optical sensor in the smart munition, it is important to safe both soft recovery system projectile and the structure as well. In this paper, a design theory was provided by using advance computational fluid dynamics techniques. For saving time, an Axi-symmetric model was analyzed by the finite element method. Transient analysis for measuring stress, in accordance with the time-dependent pressure, was used to determine the dynamics response of the structure. Based on the established the solutions, the data obtained through performing the basic experiment was compared with the analyzed solutions after designing the soft recovery system.
지능형 포탄의 저 감속 회수장치를 이용한 포탄의 감속방법
김명구(Kim, Myoung-Gu),조종두(Cho, Chong-Du),이승수(Lee, Seung-Su),유일용(Yu, Il-Young),장쾌현(Chang, Kwe-Hyun) 한국소음진동공학회 2007 한국소음진동공학회 논문집 Vol.17 No.9
With the development of micro electronic circuits and optical equipment, the demand for developing smart munitions with the ability to autonomously search for and attack targets has increased. Since the electronic components within smart munitions are affected by high temperatures, pressure, and impulsive forces upon the combustion of gunpowder, stability and reliability need to be secured for them. Securing those stability and reliability requires soft recovery system which can decelerate smart munitions. A theoretical analysis of flow is performed for the secure recovery of bullets on the basis of Euler equation for compressible fluids. The inner pressure on a pressure tube, the speeds of bullets, and the deceleration of munitions are calculated theoretically. Theoretical results are compared with the data from the experiment with soft recovery system set up at the laboratory.