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심층신경망 기반 회전익 블레이드의 단면 구조 강성 예측 모델
강병주(Byeongju Kang),천성우(Seongwoo Cheon),조해성(Haeseong Cho),기영중(Youngjung Kee),김태성(Taeseong Kim) 항공우주시스템공학회 2024 항공우주시스템공학회지 Vol.18 No.1
In this paper, two prediction models based on deep neural network that could predict cross-sectional stiffness of a rotor blade were proposed. Herein, we employed structural and material information of cross-section. In the case of a prediction model that used material properties as the input of the network, it was designed to predict the cross-sectional stiffness by considering elastic modulus of each cross-sectional member. In the case of the prediction model that used structural information as a network input, it was designed to predict the cross-sectional stiffness by considering the location and thickness of cross-sectional members as network input. Both prediction models based on a deep neural network were realized using data obtained by cross-sectional analysis with KSAC2D (Konkuk section analysis code – twodimensional).
제자리 비행 조건에서 쿼드로터의 감쇠 테이프를 이용한 수동적 진동 제어 설계 방법 연구
김세준(Sejun Kim),김형모(Hyungmo Kim),천성우(Seongwoo Cheon),김성준(Sungjun Kim),조해성(Haeseong Cho),강래형(Lae-Hyong Kang) 항공우주시스템공학회 2024 항공우주시스템공학회지 Vol.18 No.1
This paper presents a design approach for passive vibration control to reduce vertical vibrations transmitted to the control unit during hovering flight of a quadrotor drone. Ground vibration test simulation based on finite element model was performed for forced vibration analysis of the quadrotor drone. First, modal analysis was performed to evaluate dynamic characteristics. Forced vibration response analysis was then performed to obtain the steady-state response within the operating frequency range under the hovering flight condition. Furthermore, to obtain the vibration reduction effect, a viscous damping tape was applied at positions that could induce vibrations transmitted to the control unit under the same conditions. Such a passive vibration control approach was investigated. Relevant vibration reduction effect was assessed with respect to the application of damping materials and the attachment position.