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강경한,김용하,박진호,김현덕,박정선,Kang, Kyunghan,Kim, Yongha,Park, Jinho,Kim, Hyunduk,Park, Jungsun 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.2
When launch vehicles are manufactured, one of the key points is a design of lightweight structure for reducing costs. Isogrid structure was designed to solve this topic, and many researches were carried out about buckling load because compression load is mainly applied to them. Recently, many studies are also being carried out about FEM model geometry of isogrid structure. The reason is that isogrid structure depends on size of ribs so it is difficult to modify about small changes in rib pattern. In this study, 1/8 model of cylindrical isogrid structure model was developed to analyze buckling behavior. Through parameter study, buckling analysis were performed to analyze buckling load and buckling mode depending on size of ribs.
태양전지판의 유연성에 의한 고기동 위성의 동특성 분석 연구
김용하,강경한,김현덕,박정선,Kim, Yongha,Kang, Kyunghan,Kim, Hyunduk,Park, Jungsun 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.2
Recently, there are a number of studies over dynamic analysis for minimizing vibration of flexible structures such as solar panel for agility of high-agility satellite. The traditional studies perform dynamic analysis of a solar panel assumed as rigid structure since the stiffness of solar panel is higher than the stiffness of solar panel's hinge spring. However, there are vibrations that have modes of bending and torsion when high-agility satellite rotate speedily. This vibrations result in delaying safety time of satellite or degrading image quality. This paper presents dynamic analysis's technique of satellites including the spring hinge of solar panel and flexible structural solar panel's effects described as the linear equation of motion using Lagrange's theorem, and verifies the validity of an established dynamic analysis's technique of satellites by comparing the finite element method. In addition high-agility satellite's dynamic characteristics of a torque profile are analyzed from the established dynamic analysis's technique of satellites.