Complete Design of a VTOL UAV by a Large Group of Students

2008 ◽  
Author(s):  
Renaud Kiefer ◽  
Marc Vedrines ◽  
Franc¸ois Kiefer
Keyword(s):  
Design Process ◽  
Collaborative Design ◽  
Composite Structures ◽  
Point Of View ◽  
Management Tools ◽  
Main Challenge ◽  
Horizontal Flight ◽  
Air Vehicle ◽  
Entire Vehicle ◽  
Electronic Parts

This paper deals with the complete design and implementation of a small unmanned air vehicle (UAV) in the framework of a project course for engineers. This project takes place within an international contest organised by the french defence and aerospace agency. The objective is to design an autonomous air vehicle that will be able to be operated by soldiers on the battlefield, with embedded sensors and camera, which will be able to explore an urban environment, and detect targets or threads such as snipers. Our team won the first edition of the contest two year ago and is again selected with eleven other teams to take part in the new challenge next year. Our way of running this project is quite unusual on the education point of view for several reasons. In the challenging scientific area of aerospace engineering, an entire vehicle (mechanical parts as well as electronic parts) is designed, manufactured, tested and operated by students, thus involving a lot of students of different background. For instance, mechatronics students are coordinating the project, helped by students in mechanical engineering, fluid mechanics, composite structures, manufacturing, topography, physics and electronics. The main challenge is to coordinate large groups of students of different faculties and different levels, as there are more than 40 students working on the same project at the same time. The group of students studying mechatronics is currently working on this project since September 2006 and will go on until they graduate in june 2009. The aerodynamics structure is an elliptic wing within a 70 cm diameter sphere. The UAV should take of and land vertically and then fly horizontally. This challenging transition between vertical and horizontal flight is currently under study and has been carried out successfully by another team operating a more classical airplane. Moreover, the project organisation and design process is currently analysed and deals as a case study for researchers in the area of engineering design. This is also interesting as it is generally not possible to analyse the entire design process in an industrial environment. The technical aspects of the project as well as the project organisation, collaborative design tools and project management tools will be presented. The success and failures of the project organisation will be explained and the analysis from problem base learning point of view commented.

About Representational Artifacts and Their Role in Engineering

2012 ◽  
pp. 111-130 ◽  
Author(s):  
Hilda Tellioglu
Keyword(s):  
Design Process ◽  
Collaborative Design ◽  
State Of The Art ◽  
Point Of View ◽  
Ethnographic Research ◽  
Work Processes ◽  
Design Work ◽  
Work Settings ◽  
Engineering Work ◽  
Selection Of

This chapter is about showing how artifacts impact engineering work processes by representing important issues of individual and collaborative design work. After summarizing the state of the art of engineering as a design process, artifacts, and their representational role in design and engineering, a selection of rich descriptions of artifacts’ creation and use in engineering work including team-based coordination and decision activities will be presented. The studies are based on ethnographic research carried out for several years in different design and engineering companies. Artifacts used in these studies will be analyzed from their representational point of view to discuss their important role in design and engineering, by considering users’ motivation to use and sometimes adapt them as well as internal and external constraints given in work settings which call for improvisations, before concluding this chapter.

Causing a Stir

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Camilo POTOCNJAK-OXMAN
Keyword(s):  
Design Process ◽  
Collaborative Design ◽  
Entrepreneurial Activity ◽  
Design Team ◽  
Design Processes ◽  
Early Stages

Stir was a crowd-voted grants platform aimed at supporting creative youth in the early stages of an entrepreneurial journey. Developed through an in-depth, collaborative design process, between 2015 and 2018 it received close to two hundred projects and distributed over fifty grants to emerging creatives and became one of the most impactful programs aimed at increasing entrepreneurial activity in Canberra, Australia. The following case study will provide an overview of the methodology and process used by the design team in conceiving and developing this platform, highlighting how the community’s interests and competencies were embedded in the project itself. The case provides insights for people leading collaborative design processes, with specific emphasis on some of the characteristics on programs targeting creative youth

scholarly journals Combined Method to Remove Endotoxins from Protein Nanocages for Drug Delivery Applications: The Case of Human Ferritin

Pharmaceutics ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 229
Author(s):  
Filippo Silva ◽  
Leopoldo Sitia ◽  
Raffaele Allevi ◽  
Arianna Bonizzi ◽  
Marta Sevieri ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Biological Fluids ◽  
Affinity Purification ◽  
Delivery Systems ◽  
Point Of View ◽  
Uniform Structure ◽  
Structure Stability ◽  
Target Cells ◽  
Clinical Phase ◽  
Main Challenge

Protein nanocages represent an emerging candidate among nanoscaled delivery systems. Indeed, they display unique features that proved to be very interesting from the nanotechnological point of view such as uniform structure, stability in biological fluids, suitability for surface modification to insert targeting moieties and loading with different drugs and dyes. However, one of the main concerns regards the production as recombinant proteins in E. coli, which leads to a product with high endotoxin contamination, resulting in nanocage immunogenicity and pyrogenicity. Indeed, a main challenge in the development of protein-based nanoparticles is finding effective procedures to remove endotoxins without affecting protein stability, since every intravenous injectable formulation that should be assessed in preclinical and clinical phase studies should display endotoxins concentration below the admitted limit of 5 EU/kg. Different strategies could be employed to achieve such a result, either by using affinity chromatography or detergents. However, these strategies are not applicable to protein nanocages as such and require implementations. Here we propose a combined protocol to remove bacterial endotoxins from nanocages of human H-ferritin, which is one of the most studied and most promising protein-based drug delivery systems. This protocol couples the affinity purification with the Endotrap HD resin to a treatment with Triton X-114. Exploiting this protocol, we were able to obtain excellent levels of purity maintaining good protein recovery rates, without affecting nanocage interactions with target cells. Indeed, binding assay and confocal microscopy experiments confirm that purified H-ferritin retains its capability to specifically recognize cancer cells. This procedure allowed to obtain injectable formulations, which is preliminary to move to a clinical trial.

scholarly journals Cycle-oriented approach to building a model of production costs

2020 ◽  
Vol 17 ◽  
pp. 00124
Author(s):  
Elena P. Polikarpova ◽  
Igor E. Mizikovskiy
Keyword(s):  
Cost Management ◽  
Modern Science ◽  
Management Control ◽  
Point Of View ◽  
Production Costs ◽  
Production Cycle ◽  
Agricultural Activity ◽  
Management Tools ◽  
Agricultural Enterprises ◽  
Oriented Approach

Modern science and practice does not have a sufficient set of cost management tools, taking into account the duration of the production cycle, characteristic of agricultural activity. The implementation of a cycle-oriented approach to building a model of production costs was based on studying the existing options for classifying production costs, which were supplemented with features from the perspective of managing long production cycles. As a result of the study, a model of production costs was built from the point of view of a cycle-oriented approach, as well as a model of production costs from the standpoint of features of a long production cycle. The model can serve as the basis for the formation of the information space of cost management, control and cost analysis in the economy of agricultural enterprises.

Process Control Method of Complex Product Multidisciplinary Collaborative Design System

2013 ◽  
Vol 712-715 ◽  
pp. 2888-2893
Author(s):  
Hai Qiang Liu ◽  
Ming Lv
Keyword(s):  
Information Sharing ◽  
Product Design ◽  
Design Process ◽  
Collaborative Design ◽  
Control Method ◽  
Integrated System ◽  
Design System ◽  
System Control ◽  
Complex Product ◽  
Product Design Process

In order to realize information sharing and interchange of complex product multidisciplinary collaborative design (MCD) design process and resources. The Process integrated system control of product multidisciplinary collaborative design was analyzed firstly in this paper, then design process of complex product for supporting multidisciplinary collaborative was introduced, a detailed description is given of the organization structure and modeling process of MCD-oriented Integration of Product Design Meta-model ; and concrete implement process of process integrated system control method was introduced to effectively realize information sharing and interchange between product design process and resources.

scholarly journals Energy Storage in crystalline Materials based on multivalent Ions

2014 ◽  
Vol 70 (a1) ◽  
pp. C365-C365
Author(s):  
Tina Nestler ◽  
William Förster ◽  
Stefan Braun ◽  
Wolfram Münchgesang ◽  
Falk Meutzner ◽  
...  
Keyword(s):  
Electric Energy ◽  
Lithium Ion ◽  
Point Of View ◽  
Electrical Performance ◽  
Ion Diffusion ◽  
Crystalline Materials ◽  
Multivalent Ions ◽  
Main Challenge ◽  
Energy Conversion And Storage ◽  
Solid State Batteries

Energy conversion and storage has become the main challenge to satisfy the growing demand for renewable energy solutions as well as mobile applications. Nowadays, several technologies exist for the conversion of electric energy into e. g. heat, light and motion or vice versa. Among a large variety of storage concepts, the conversion of electrical in chemical energy is of great relevance in particular for location-independent use. Main factors that still limit the use of electrochemical cells are the volumetric and gravimetric energy density, cyclability as well as safety. The concept for a new thin-film rechargeable battery that possibly improves these properties is presented. In contrast to the widespread lithium-ion technology, the discussed battery is based on the redox reaction of multivalent Al-ions and their migration through solid electrolytes. The ion conduction and insertion processes in the crystalline materials of the suggested cell are discussed under a crystallographic point of view to identify suitable electrode and separator materials. A multilayer-stack of all-solid-state batteries is synthesized by pulsed laser deposition and investigated in situ, i. e. during charge and discharge, by X-ray reflection and diffraction methods. The correlation between crystal structure, morphology and electrical performance is investigated in order to characterize the ion diffusion and insertion process.

scholarly journals Design Process of Energy Effective Shredding Machines for Biomass Treatment

10.14311/1622 ◽  
2012 ◽  
Vol 52 (5) ◽  
Author(s):  
Juraj Beniak ◽  
Juraj Ondruška ◽  
Viliam Čačko
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Design Process ◽  
Electric Energy ◽  
Point Of View ◽  
Processed Material ◽  
Material Saving

The shredding process has not been sufficiently investigated for the design of better, energy and material saving shredding machines. In connection with present-day concern about the environment, ecology, energy saving, recycling, and finding new sources of energy, we need to look at the design of shredding machinery, the efficiency of the machines that we using, and ways of improving them to save electric energy for their operation. This paper deals with sizing and designing shredding machines from the point of view of energy consumption and optimization for specific types of processed material.

Investigating the Use of Large-Scale Immersive Computing Environments in Collaborative Design

2014 ◽  
Author(s):  
Meisha Rosenberg ◽  
Judy M. Vance
Keyword(s):  
Design Process ◽  
Collaborative Design ◽  
Large Scale ◽  
Design Teams ◽  
Team Members ◽  
3D Cad ◽  
Cad Models ◽  
Computing Environments ◽  
Design Ideas ◽  
Human Motions

Successful collaborative design requires in-depth communication between experts from different disciplines. Many design decisions are made based on a shared mental model and understanding of key features and functions before the first prototype is built. Large-Scale Immersive Computing Environments (LSICEs) provide the opportunity for teams of experts to view and interact with 3D CAD models using natural human motions to explore potential design configurations. This paper presents the results of a class exercise where student design teams used an LSICE to examine their design ideas and make decisions during the design process. The goal of this research is to gain an understanding of (1) whether the decisions made by the students are improved by full-scale visualizations of their designs in LSICEs, (2) how the use of LSICEs affect the communication of students with collaborators and clients, and (3) how the interaction methods provided in LSICEs affect the design process. The results of this research indicate that the use of LSICEs improves communication among design team members.

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