Results 21 to 30 of about 85,317 (164)

Mission-Oriented 3D Path Planning for High-Altitude Long-Endurance Solar-Powered UAVs With Optimal Energy Management

open access: yesIEEE Access, 2020
The conversion efficiency of solar energy and the capacity of energy storage batteries are the key technologies limiting the development of solar-powered aircraft. In this paper, a mission-oriented design for the 3-dimensional (3D) path planning of solar-
Xiangyu Wang   +4 more
doaj   +1 more source

Design of High Temperature Ti–Al–Cr–V Alloys for Maximum Thermodynamic Stability Using Self-Organizing Maps

open access: yesMetals, 2019
Data generated for the Ti−Al−Cr−V system of metallic alloys from our previous publication, where the composition of 102 alloys were computationally Pareto optimized with the objective of simultaneously maximizing the Young’s ...
Rajesh Jha, George S. Dulikravich
doaj   +1 more source

Preliminary Sizing of the Electrical Motor and Housing of Electromechanical Actuators Applied on the Primary Flight Control System of Unmanned Helicopters

open access: yesAerospace, 2022
Helicopter dronization is expanding, for example, the VSR700 project. This leads to the integration of electromechanical actuators (EMAs) into the primary flight control system (PFCS).
Jeremy Roussel   +2 more
doaj   +1 more source

Optimal Design of Electrically Fed Hybrid Mars Ascent Vehicle

open access: yesAerospace, 2021
The optimal design of the propulsion system for a potential Mars Ascent Vehicle is analyzed, in the context of the Mars Sample Return Mission. The Mars Ascent Vehicle has to perform an initial ascent phase from the surface and then circularize into a 170
Lorenzo Casalino   +2 more
doaj   +1 more source

Design Optimization of a Multi-Megawatt Wind Turbine Blade with the NPU-MWA Airfoil Family

open access: yesEnergies, 2019
A new airfoil family, called NPU-MWA (Northwestern Polytechnical University Multi-megawatt Wind-turbine A-series) airfoils, was designed to improve both aerodynamic and structural performance, with the outboard airfoils being designed at high design lift
Jianhua Xu   +3 more
doaj   +1 more source

Multidisciplinary Optimization and Analysis of Stratospheric Airships Powered by Solar Arrays

open access: yesAerospace, 2023
Stratospheric airships have much potential in military and commercial applications. Design, analysis and optimization of stratospheric airships involves complex trade-off of different disciplines, and hence a multidisciplinary approach is essential. This
Jiwei Tang   +5 more
doaj   +1 more source

Multidisciplinary Optimization in Services Management [PDF]

open access: yesTheoretical and Applied Economics, 2007
Optimization methods may be applied to the services operations management. A comprehensive objective function (a cost-function to be minimized) leads to a multidisciplinary optimization, considering all aspects of a services business unit.
George Moldoveanu, Octavian Thor Pleter
doaj   +1 more source

Two-Way Coupled Aero-Structural Optimization of Stable Flying Wings

open access: yesAerospace, 2023
An aero-structural algorithm to optimize a flying wing in cruise conditions for preliminary design is developed using two-way interaction between the structure and aerodynamics.
José D. Hoyos   +5 more
doaj   +1 more source

Multidisciplinary Optimization of Thermal Insulation Layer for Stratospheric Airship with a Solar Array

open access: yesAerospace, 2022
Stratospheric airships with a solar array have demonstrated overwhelming superiority in many aspects, such as earth observation, meteorological survey, and communication relay. The solar array supplies sufficient power for the airship to be in flight for
Yang Liu   +3 more
doaj   +1 more source

Winglet Geometry Impact on DLR-F4 Aerodynamics and an Analysis of a Hyperbolic Winglet Concept

open access: yesAerospace, 2017
In this article, the growth of aerodynamic efficiency and the growth of the wing structural stress is studied for DLR-F4 typical transport aircraft wing-body, after installing classical Whitcomb winglets of different configurations and a delta wingtip ...
Djahid Gueraiche, Sergey Popov
doaj   +1 more source

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