scholarly journals Development of Design Methodology for a Small Solar-Powered Unmanned Aerial Vehicle

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Parvathy Rajendran ◽  
Howard Smith
Keyword(s):  
Trend Analysis ◽  
Electric Propulsion ◽  
Design Feature ◽  
Design Model ◽  
Design Models ◽  
Validation Experiment ◽  
Aerial Vehicle ◽  
Solar Powered ◽  
Improved Design ◽  
Mathematical Design

Existing mathematical design models for small solar-powered electric unmanned aerial vehicles (UAVs) only focus on mass, performance, and aerodynamic analyses. Presently, UAV designs have low endurance. The current study aims to improve the shortcomings of existing UAV design models. Three new design aspects (i.e., electric propulsion, sensitivity, and trend analysis), three improved design properties (i.e., mass, aerodynamics, and mission profile), and a design feature (i.e., solar irradiance) are incorporated to enhance the existing small solar UAV design model. A design validation experiment established that the use of the proposed mathematical design model may at least improve power consumption-to-take-off mass ratio by 25% than that of previously designed UAVs. UAVs powered by solar (solar and battery) and nonsolar (battery-only) energy were also compared, showing that nonsolar UAVs can generally carry more payloads at a particular time and place than solar UAVs with sufficient endurance requirement. The investigation also identified that the payload results in the highest effect on the maximum take-off weight, followed by the battery, structure, and propulsion weight with the three new design aspects (i.e., electric propulsion, sensitivity, and trend analysis) for sizing consideration to optimize UAV designs.

scholarly journals Experimental Analysis of Small Solar Unmanned Aerial Vehicle to Predict Aerodynamic Performance

2020 ◽  
Vol 12 (4) ◽  
pp. 173-182
Author(s):  
Parvathy RAJENDRAN ◽  
Howard SMITH
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Flight Test ◽  
Aerodynamic Characteristics ◽  
Design Model ◽  
Prototype Model ◽  
Flight Performance ◽  
Aerial Vehicle ◽  
And Performance ◽  
Solar Powered ◽  
Mathematical Design

Various studies have been done in recent years on unmanned solar-powered aircraft for non-stop flight at a specified location or area. However, if a solar-powered unmanned aerial vehicle (UAV) can achieve a non-stop flight around the world, it may lead to the possibility of a pseudolite (i.e., pseudo-satellite) operation. These solar UAVs capable of operating as a satellite enable sustainable aviation that provides cheaper communication accessibility. Recently, we have developed a mathematical model for solar UAVs that was followed by the fabrication of a solar UAV model. Both the mathematical design model and the prototype model have been published. Thus, this work aims to determine the actual flight performance characteristics of the fabricated solar UAV. In this work, the bench and flight tests of the prototype solar and non-solar UAV model were compared in terms of aerodynamic characteristics and performance. These characteristics are determined using the flight test data and then compared with simulation data using a mathematical design model published earlier. Both accelerated and un-accelerated methods have been applied to predict the polar drag curve, and a distinct band of data obtained for both UAV prototypes. The predicted zero-lift drag coefficients were similar to the theoretical prediction in these UAVs.

scholarly journals Computer-aided design model parameterisation to derive knowledge useful for manufacturing design decisions

2017 ◽  
Vol 232 (4) ◽  
pp. 621-628 ◽  
Author(s):  
Trevor Robinson ◽  
Imelda Friel ◽  
Cecil G Armstrong ◽  
Adrian Murphy ◽  
Joe Butterfield ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Design Feature ◽  
Design Model ◽  
Optimal Model ◽  
Design Decisions ◽  
Design Models ◽  
Computer Aided ◽  
Novel Approaches ◽  
Aided Design ◽  
Product Assembly

This article presents a number of novel approaches for deriving intelligence from the parameterisation of computer-aided design models to assist the engineer in making manufacturing-related decisions. During the design process, a disjoint can occur between the nominally defined computer-aided design feature parameters and the dimensions which govern manufacture and influence ease of product assembly. In this work, a link between the two representations is established, which simplifies the process of using the parameters defining the features in the computer-aided design model to make manufacturing-related decisions such as the allocation of dimensional tolerances or dealing with fit issues. It also offers insights about how the model should be parameterised to provide the optimal model utility from the designer’s perspective with respect to the manufacturing domain.

Ruins of Excess: Computer Game Images and the Rendering of Technological Obsolescence

2021 ◽  
pp. 155541202110053
Author(s):  
Eduardo H Luersen ◽  
Mathias Fuchs
Keyword(s):  
Surface Layer ◽  
Game Design ◽  
Industrial Design ◽  
Electronic Waste ◽  
Computer Game ◽  
Digital Games ◽  
Design Model ◽  
Design Tools ◽  
Design Models ◽  
Technological Obsolescence

In this article, we describe three layers of ruins related to computer game technology: in a surface layer, we examine the imagery of ruins in digital games, highlighting game design tools for developing in-game ruination. Secondly, we approach the industrial design model of technological obsolescence as an infrastructural layer that intrinsically demands the production of new provisional spaces for material decay. Lastly, through a waste layer, we unfold the geopolitical dimension of technological obsolescence, calling attention to the transcontinental flows of electronic waste, which also underscores a geological stage of ruination. While exploring these different layers of ruins, we wish to perceive how game design models might relate to different forms of contemporary ruination, inquiring what such material traces have to say as strata of the complex deterioration processes of present-day media.

Parameter analysis of power system for solar-powered unmanned aerial vehicle

2021 ◽  
Vol 295 ◽  
pp. 117031
Author(s):  
Chaoyu Zhang ◽  
Chengming Zhang ◽  
Liyi Li ◽  
Qingbo Guo
Keyword(s):  
Power System ◽  
Unmanned Aerial Vehicle ◽  
Parameter Analysis ◽  
Aerial Vehicle ◽  
Solar Powered

Impact of N-Shaped Wing Morphing on Solar-Powered Aircraft

2020 ◽  
pp. 1-12
Author(s):  
Mostafa E. El-Salamony ◽  
Mohamed A. Aziz
Keyword(s):  
Solar Energy ◽  
Lift Coefficient ◽  
Morphing Wing ◽  
Aerial Vehicles ◽  
Aircraft Performance ◽  
Aerial Vehicle ◽  
Solar Powered ◽  
Two Parameters ◽  
Wing Morphing ◽  
The Impact

Generally, unmanned aerial vehicles and micro aerial vehicles depend on batteries or conventional fuel as a source of energy. These sources of energy have limited flight time, relatively high cost, and also a certain level of pollutants. Solar energy applied to aerial vehicles is an excellent alternative way to overcome other sources of energy’s disadvantage. This study aimed to design a solar-powered aerial vehicle to achieve continuous flight on Earth. The efficiency of the solar system is related to the absorbed sun rays. The concept of an anti-symmetric N-shaped morphing wing is a good idea to increase the collected solar energy during the daily sun path. But this comes with the penalty of side forces and moments due to the anti-symmetry of the wing. This paper introduces a study for two parameters that strongly affect the aerodynamics of the N-shaped morphing wing; the dihedral part angle and the dihedral part length. The impact of the dihedral angle decreases the lift coefficient and increases the drag coefficient. The impact of the morphing wing on the aircraft performance is also considered.

scholarly journals Design of a Hand-Launched Solar-Powered Unmanned Aerial Vehicle (UAV) System for Plateau

2020 ◽  
Vol 10 (4) ◽  
pp. 1300 ◽  
Author(s):  
Xin Zhao ◽  
Zhou Zhou ◽  
Xiaoping Zhu ◽  
An Guo
Keyword(s):  
Low Temperature ◽  
Conceptual Design ◽  
Unmanned Aerial Vehicle ◽  
Design Method ◽  
Structure Design ◽  
Control Law ◽  
Trajectory Tracking Control ◽  
Plateau Area ◽  
Aerial Vehicle ◽  
Solar Powered

This paper describes our work on a small, hand-launched, solar-powered unmanned aerial vehicle (UAV) suitable for low temperatures and high altitudes, which has the perpetual flight potential for conservation missions for rare animals in the plateau area in winter. Firstly, the conceptual design method of a small, solar-powered UAV based on energy balance is proposed, which is suitable for flight in high-altitude and low-temperature area. The solar irradiance model, which can reflect the geographical location and time, was used. Based on the low-temperature discharge test of the battery, a battery weight model considering the influence of low temperature on the battery performance was proposed. Secondly, this paper introduces the detailed design of solar UAV for plateau area, including layout design, structure design, load, and avionics. To increase the proportion of solar cells covered, the ailerons were removed and a rudder was used to control both roll and yaw. Then, the dynamics model of an aileron-free layout UAV was developed, and the differences in maneuverability and stability of aileron-free UAV in plateau and plain areas were analyzed. The control law and trajectory tracking control law were designed for the aileron-free UAV. Finally, the flight test was conducted in Qiangtang, Tibet, at an altitude of 4500 m, China’s first solar-powered UAV to take off and land above 4500 m on the plateau in winter (−30 °C). The test data showed the success of the scheme, validated the conceptual design method and the success of the control system for aileron-free UAV, and analyzed the feasibility of perpetual flight carrying different loads according to the flight energy consumption data.

scholarly journals A Systematic Approach towards Transformation of Presentation Web Goal Oriented Requirements Language to Presentation Design Model

2014 ◽  
Vol 5 (10) ◽  
pp. 7-17
Author(s):  
Sangeeta Srivastava
Keyword(s):  
Model Transformation ◽  
Web Applications ◽  
Early Stage ◽  
System Development ◽  
Requirements Analysis ◽  
Design Model ◽  
Specific Design ◽  
Uml Profile ◽  
Design Models ◽  
The Web

A number of modeling approaches are being used to design web applications.However, they mostly focus on design aspects and many a times they are unable to meet the real goal and expectations of the users. Goal Oriented Requirement Engineering is a popular approach for Information system development but has not been explored much for Web applications. Goal driven requirements analysis helps in capturing stakeholders’ goals very finely, they enhance the requirements analysis in many ways, as the requirement clarification and the conflicts between requirements can be detected at an early stage and design alternatives can be evaluated and selected to suit the require ments. In this paper, we take a step from the requirements phase to the design phase. While adheringto the web based goal oriented requirements engineering in the first phase we move to the A-OOH design models using a model transformation strategy to derive web specific design models supported by a UML profile. This helps in seamlessly generating the web specific design models namely the content, navigation, presentation, business process and adaptivity models. In this paper the focus is on transformation of WebGRL Presentation model to its Presentation design model. The model transformation approach aims at automatic transformation of the repeatedly refined and resolved alternatives presented by us in the WEBGRE framework as an input to the design models supported by a UML profile. This would lead to a better design and high quality of product development which captures the stakeholders’ goals very closely.

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