HELIPLAT: Design, Aerodynamic, Structural Analysis of Long- Endurance Solar-Powered Stratospheric Platform

Romeo, Giulio; Frulla, Giacomo; Cestino, Enrico; Corsino, G.

doi:10.2514/1.2723

Cited by 94 publications

(41 citation statements)

References 4 publications

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“…Examples of these projects are HeliNet, CAPANINA, USEHAAS and COST297/ HAPCOS (Grace and Mohorcic 2011). In the HeliNet Project, completed in 2003, the Politecnico di Torino prepared studies for a stratospheric UAV denominated HeliPlat with a wingspan of 73 m, total mass of 815 kg and payload of 100 kg (Romeo et al 2004). The Advanced Research in Telecommunications Systems (ARTES) Project, from the European Space Agency (ESA), completed in 2005, made an estimate that the development of 2 stratospheric platforms with solar electric propulsion (airplane and airship) would require total resources of 270 million euros (about 302 million dollars), over a 10-year period (ESA 2006).…”

Section: Other Projectsmentioning

confidence: 99%

High-Altitude Platforms - Present Situation and Technology Trends

d’Oliveira¹,

Melo²,

Devezas³

2016

J.Aerosp. Technol. Manag.

181

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High-altitude platforms (HAPs) are aircraft, usually unmanned airships or airplanes positioned above 20 km, in the stratosphere, in order to compose a telecommunications network or perform remote sensing. In the 1990 and 2000 decades, several projects were launched, but very few had continued. In 2014, 2 major Internet companies (Google and Facebook) announced investments in new HAP projects to provide Internet access in regions without communication infrastructure (terrestrial or satellite), bringing back attention to the development of HAP. This article aims to survey the history of HAPs, the current state-of-the-art (April 2016), technology trends and challenges. The main focus of this review will be on technologies directly related to the aerial platform, inserted in the aeronautical engineering field of knowledge, not detailing aspects of the telecommunications area.

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Section: Other Projectsmentioning

confidence: 99%

High-Altitude Platforms - Present Situation and Technology Trends

d’Oliveira¹,

Melo²,

Devezas³

2016

J.Aerosp. Technol. Manag.

181

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“…9. 고고도 장기체공 전기 동력 무인기의 꼬리 날개 설계 709 Ⅰ. 서 론 저고도 인공위성의 역할을 대체할 목적으로 보다 편리한 운용과 재활용이 가능한 고고도 장 기 체공 무인기(High Altitude Long Endurance Unmanned Aerial Vehicle, HALE UAV)가 세계 적으로 개발되고 있고 [1][2][3], 태양광이나 연료전지 를 이용한 전기 추진시스템의 미래 지향적이고, 이산화탄소의 배출이 전혀 없는 친환경적인 장기 체공형 무인비행체 개발이 세계적인 추세이다 [4][5]. 한국항공우주연구원(KARI) 역시 고고도 전 기추진(태양광+배터리) 장기체공 무인기(EAV-3) 를 개발하고 있는 중 이다.…”

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Empennage Design of Solar-Electric Powered High Altitude Long Endurance Unmanned Aerial Vehicle

Hwang

Lee²,

Kim³

et al. 2013

Journal of the Korean Society for Aeronautical & Space Scie

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KARI is developing a solar-electric powered HALE UAV(EAV-3). For demonstrating the technology, EAV-2H, a down-scaled version of EAV-3, is developed and after EAV-2H's initial flight test, the directional stability and control need to be improved. Thus, the vertical tail and rudder of EAV-2H are redesigned with Advanced Aircraft Analysis(AAA).Size of the rudder is increased from mean chord ratio of rudder to vertical tail,      =30 to     =60 and size of the vertical tail is reduced 15%. As a result, the directional control to side wind(  ) is improved to sideslip angle,  deg=25°and   (m/sec)=3.54. Also, variation of airplane side force coefficient with sideslip angle(   ) and variation of airplane side force coefficient with dimensionless rate of change of yaw rate (   ) are reduced 15% and 22%, respectively to minimize the effect of side wind. The empennage design of EAV-2H is verified with flight tests and applied to design of KARI's solar-electric-powered EAV-3.

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“…[1][2] It is known that the electricity from fuel cells and solar cells is an appropriate power source for long-endurance flight. Fuel cells have a higher energy density compared to ordinary batteries, and the electricity can be recharged from solar cells during daytime flight.…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of the Aerodynamic Performance of a Long-Endurance UAV

Jin¹,

Lee²

2014

International Journal of Aeronautical and Space Sciences

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This paper presents the computational aerodynamic analysis of a long-endurance UAV that was developed by the Korea Aerospace Research Institute (KARI), named EAV-2. EAV-2 is a technical demonstrator of aerodynamically efficient design, as well as a hybrid electric-propulsion system for future long-endurance UAVs. We evaluated the aerodynamic characteristics of six low-Reynolds number airfoils, using a panel method code, XFOIL, to select an optimal airfoil for the long-endurance mission of EAV-2. The computational results by a CFD code, FLUENT, suggested that the aerodynamic performance of EAV-2 would be notably improved after adopting SG6043 airfoil, and modifying the fuselage design. This reduced the total drag by 43%, compared to that of a previous KARI model, EAV-1, at the target lift of CL=1.0. Also, we achieved a drag reduction of approximately 14% by means of the low-drag fuselage configuration.

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HELIPLAT: Design, Aerodynamic, Structural Analysis of Long- Endurance Solar-Powered Stratospheric Platform

Cited by 94 publications

References 4 publications

High-Altitude Platforms - Present Situation and Technology Trends

High-Altitude Platforms - Present Situation and Technology Trends

Empennage Design of Solar-Electric Powered High Altitude Long Endurance Unmanned Aerial Vehicle

Computational Analysis of the Aerodynamic Performance of a Long-Endurance UAV

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