지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
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- 지도교수
- 박재현
- 발행연도
- 2022
- 저작권
- 경상대학교 논문은 저작권에 의해 보호받습니다.
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LRU(Line Replacement Unit) modifications are often made for military aircraft due to aging. KA-O(Armed Airborne Controller) is a small military aircraft based on KT-O basic trainer, and it has been operated since 2006. For example, the LRU modifications were recently proceeded for KA-O by improving the ejection seat and adding an anti-jamming GPS. As a result, the aircraft''s operational CG(Center of Gravity) became out of the range in the specification. In the aspect of flight safety, the center of gravity is greatly significant. The military specification also limits the range of the operational CG. Therefore, the off-ranged CG of the modified KA-O must be corrected by introducing an appropriate method.
This study proposes a procedure for revising and verifying empty weight CG due to LRU modification for small military aircraft. This study considers KA-O as a representative small military aircraft. First, the alteration of empty weight CG of KA-O is comprehensively investigated upon the LRU modifications such as improving the ejection seat and adding anti-jamming GPS. Then, several ballast masses are introduced to the engine mount strut, in which their maximum mass enough to restore the empty weight CG to a safe operational range. For the ballast installation verification, the stress analysis and fatigue analysis for the revised engine mount strut is performed for various operating conditions.
Considering that there is not much open information available for the revision of empty weight CG, the present study will be greatly valid since it presents an established procedure for revision and verification of empty weight CG in aircraft modification.
This study proposes a procedure for revising and verifying empty weight CG due to LRU modification for small military aircraft. This study considers KA-O as a representative small military aircraft. First, the alteration of empty weight CG of KA-O is comprehensively investigated upon the LRU modifications such as improving the ejection seat and adding anti-jamming GPS. Then, several ballast masses are introduced to the engine mount strut, in which their maximum mass enough to restore the empty weight CG to a safe operational range. For the ballast installation verification, the stress analysis and fatigue analysis for the revised engine mount strut is performed for various operating conditions.
Considering that there is not much open information available for the revision of empty weight CG, the present study will be greatly valid since it presents an established procedure for revision and verification of empty weight CG in aircraft modification.
목차
Ⅰ. 서 론 11. 연구 배경 11) 공중통제기(KA-O) 소개 12) 성능개량사업으로 인한 사출좌석 개선 및 항재밍 GPS 추가 32. 연구의 필요성 61) 성능개량에 따른 문제점 63. 연구의 목적 11Ⅱ. 본 론 151. 원인분석 152. 해결안 도출 173. 공허 중량 무게중심 범위 변경 및 적용 가능성 검토 191) 공허 중량 무게중심 범위 변경 192) 전방착륙장치(Nose landing gear) 베이 밸러스트 추가 한계 223) 엔진 설치대(Engine mount strut) 밸러스트 추가 제안 224. 연구검증 251) 엔진 설치대 밸러스트 중량 설정 및 구조 건전성 확인 25(1) 응력 해석 수행 25(2) 피로 해석 수행 302) 운영 무게중심 범위 초과 여부 확인 32III. 결 론 45참 고 문 헌 47
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