고고도 장기체공 태양광 무인기 EAV-3 기체구조 개발

• Published in: 한국항공운항학회지 Vol. 25; no. 3; pp. 35 - 43
• Main Authors: 신정우, 박상욱, 이상욱, 김태욱, Shin, Jeong Woo, Park, Sang Wook, Lee, Sang Wook, Kim, Tae-Uk
• Format: Journal Article
• Language: Korean
• Published: 한국항공운항학회 01.09.2017
• Subjects: 항공우주공학
• ISSN: 1225-9705; 2466-1791

Research for solar-powered high altitude long endurance(HALE) UAV was conducted by Korea Aerospace Research Institute(KARI), and the EAV-3 with 19.5m wing span was developed. For HALE flight, aircraft should be lightly designed. Especially, airframe structure that accounts for a large portion of the total weight of aircraft should be lightweight. In this paper, development process of airframe structure for solar-powered HALE UAV, EAV-3, is described briefly. Domestic developed T-800 grade CFRP(Carbon Fiber Reinforced Plastic) composite material with high modulus and strength was used to design main load carrying structures. Flightloads analysis that takes into account large structural deformation was carried out. Stress and flutter analyses for airframe structure sizing were conducted. Static strength test for main wing and aircraft ground vibration test were conducted successfully and structural integrity was secured.