Design of solar high altitude long endurance aircraft for multi payload &amp; operations

Cestino, Enrico

doi:10.1016/j.ast.2006.06.001

Cited by 111 publications

(45 citation statements)

References 6 publications

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“…In this way, it is possible to arrange the photovoltaic cells without considerable deformations. This type of configuration can also be seen in Cestino (2006), Gao et al (2014) and Romeo et al (2007). On the other hand, new methodologies to optimize the construction of the aircraft were implemented following the global trend by applying manufacturing processes with composite materials.…”

Section: Uav Descriptionmentioning

confidence: 99%

“…The conceptual design of the UAV was carried out taking into account the optimal performance of the amount of harnessing solar energy achieved by the UAVs (Cestino 2006;Youngblood et al 1984), which depends on the following environmental and technical factors: seasons of the year, due to the amount of sunlight that is exposed on the Earth's surface; time of the day, as a result of the sunlight intensity increase from sunrise until noon; the sun irradiance, exploitable in some periods of the day; efficiency of the photovoltaic cell, in which typical polycrystalline cell efficiencies are between 13 and 18%; and the surface area of the solar cells, directly proportional to the amount of electric power supplied. Therefore, a larger wing surface was necessary to get better results from electrical power generation.…”

Section: Introductionmentioning

confidence: 99%

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Design and Manufacture of a Solar-Powered Unmanned Aerial Vehicle for Civilian Surveillance Missions

Betancourth

Villamarín

Ríos

et al. 2016

J.Aerosp. Technol. Manag.

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In order to promote the development of renewable energy and take advantage of the new technologies for the benefit of sustainability, both the design and the manufacture methodologies of an experimental solarpowered unmanned aerial vehicle for civilian surveillance applications are presented. Throughout the document, it is provided the historical process around the development of the aircraft. Therefore, in the first part, it is shown the aerodynamic design, which includes the 2-D and 3-D analyses of the wing platform using numerical and experimental methods, the analytical design of the empennage configuration, and the main characteristics of the performance analysis. In addition, major systems and components that characterize the aircraft are described, such as the photovoltaic solar cells configuration as well as the electronics and control system into the unmanned aerial vehicle. Lastly, the modeling for the weights distribution of the components was carried out in a preliminary test using CAD tools. Thus, it was obtained a suitable process for the manufacture of the unmanned aerial vehicle, considering that the purpose of the aircraft is to be as light and aerodynamic as possible to accomplish the mission for which it was created.

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Section: Uav Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Manufacture of a Solar-Powered Unmanned Aerial Vehicle for Civilian Surveillance Missions

Betancourth

Villamarín

Ríos

et al. 2016

J.Aerosp. Technol. Manag.

View full text Add to dashboard Cite

show abstract

“…There is currently research being undertaken into the use of Blended-Wing Body con¦gurations for UAV applications because of their perceived advantages in terms of aerodynamic and structural e©ciency [4]. A true §ying-wing is perhaps the most aerodynamically-e©cient aircraft con¦g-uration but, to date, has not been investigated in any detail for possible application to HA UAVs.…”

Section: Introductionmentioning

confidence: 99%

Design of a high altitude long endurance flying-wing solar-powered unmanned air vehicle

Alsahlani

Johnston

Atcliffe

2017

Progress in Flight Physics

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The low-Reynolds number environment of high-altitude §ight places severe demands on the aerodynamic design and stability and control of a high altitude, long endurance (HALE) unmanned air vehicle (UAV). The aerodynamic e©ciency of a §ying-wing con¦guration makes it an attractive design option for such an application and is investigated in the present work. The proposed con¦guration has a high-aspect ratio, swept-wing planform, the wing sweep being necessary to provide an adequate moment arm for outboard longitudinal and lateral control surfaces. A design optimization framework is developed under a MATLAB environment, combining aerodynamic, structural, and stability analysis. Low-order analysis tools are employed to facilitate e©cient computations, which is important when there are multiple optimization loops for the various engineering analyses. In particular, a vortex-lattice method is used to compute the wing planform aerodynamics, coupled to a twodimensional (2D) panel method to derive aerofoil sectional characteristics. Integral boundary-layer methods are coupled to the panel method in order to predict §ow separation boundaries during the design iterations. A quasi-analytical method is adapted for application to §ying-wing con¦gurations to predict the wing weight and a linear ¦nite-beam element approach is used for structural analysis of the wing-box. Stability is a particular concern in the low-density environment of high-altitude §ight for §ying-wing aircraft and so provision of adequate directional stability and control power forms part of the optimization process. At present, a modi¦ed Genetic Algorithm is used in all of the optimization loops. Each of the low-order engineering analysis tools is validated using higher-order methods to provide con¦dence in the use of these computationally-e©cient tools in the present design-optimization framework. This paper includes the results of employing the present optimization tools in the design of a HALE, §ying-wing UAV to indicate that this is a viable design con¦guration option.

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“…By bringing human out of the cockpit, both mission and cost effectiveness are enhanced by multiple folds. Medium Altitude Long Endurance (MALE) [3] or High Altitude Long Endurance (HALE) [4] configurations are worthy of performing Dull, Dangerous and Dirty (DDD) missions. However, since the safety factor during design considerations of UAVs is relatively low, therefore, system and subsystem level failures are a common occurrence [5].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling & Stability Analysis of a Generic UAV in Glide Phase

2017

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Abstract. In this paper, we present dynamic modelling and stability analysis of a generic UAV in the glide phase under engine failure condition. When such extreme phenomena occurs, the most desirable requirement is to survive that stage by keeping the vehicle controllable by maintaining its orientation and to glide the vehicle towards the intended direction with maximum extended range. This study investigates the stability aspects of one such aerial vehicle under engine failure condition. In the proposed architecture, a six degree of freedom vehicle dynamic simulation model is implemented through a set of coupled non-linear differential equations. The aerodynamic forces and moments encountered by the UAV during various phases of the flight are ascertained through empirical / non-empirical techniques. Nonlinear constrained optimization technique is employed to evaluate the steady state values of the optimized trajectory for the complete flight regime. Results from dynamical systems theory are applied to investigate local stability characteristics of UAV around the steady state. Complete set of dynamic modes of UAV throughout the glide phase are evaluated and mode content in each of the motion variable is determined using modal decomposition technique. The dynamic characteristics of the open-loop configuration are assessed to generate adequate benchmark performance for closed-loop controller design

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Design of solar high altitude long endurance aircraft for multi payload & operations

Cited by 111 publications

References 6 publications

Design and Manufacture of a Solar-Powered Unmanned Aerial Vehicle for Civilian Surveillance Missions

Design and Manufacture of a Solar-Powered Unmanned Aerial Vehicle for Civilian Surveillance Missions

Design of a high altitude long endurance flying-wing solar-powered unmanned air vehicle

Dynamic Modeling & Stability Analysis of a Generic UAV in Glide Phase

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