scholarly journals MULTI-CRITERIA OPTIMIZATION AS KEY TO YACHT PERFORMANCE IMPROVEMENT

2019 ◽  
Author(s):  
K Hochirch ◽  
S Deucker ◽  
V Bertram
Keyword(s):  
Energy Efficiency ◽  
Performance Improvement ◽  
Virtual Prototyping ◽  
High Fidelity ◽  
Design Exploration ◽  
Concept Exploration ◽  
Industry Practice ◽  
Key Techniques ◽  
Short Time ◽  
Formal Optimization

The paper describes the application of multi-criteria optimization to monohull and multihull yacht configurations. The paper outlines the process (involving concept exploration, formal optimization and simulations), key techniques, employed software tools and results. The analyses combine efficient low-fidelity design exploration with high-fidelity CFD simula-tions for accurate results. The process allows advancing unconventional designs in relatively short time exploiting the power of parallel computing and virtual prototyping. For yachts, “performance” improvement encompasses besides energy efficiency also aspects of passenger comfort. Examples, sometimes anonymized, from industry practice are used to illus-trate approach and possible achievements.

Accessory Gear Box Architecture Evaluation Tool

2014 ◽  
Author(s):  
Pankaj Sharma ◽  
Thomas Moniz ◽  
Vinod Chaudhari
Keyword(s):  
Design Space ◽  
Gear Train ◽  
Minimum Size ◽  
High Fidelity ◽  
Preliminary Design ◽  
Evaluation Tool ◽  
Architecture Evaluation ◽  
Short Time ◽  
Structured Approach ◽  
Close Fit

An architectural modeling tool has been developed to support Accessory Gearbox (AGB) design. This is a structured approach which allows the Preliminary Design team to design an AGB with high fidelity in a short time and earlier in the design process. The program can accommodate a large variety of accessories with different attributes to generate a gearbox of minimum size. The final gearbox shape includes curvature which enables a close fit to the engine carcass. By setting the size, shape and location of the gearbox and accessories earlier, the designer can begin the process of locating external configurations around the gearbox more efficiently. The tool systematically explores the design space to optimize geometry based on multiple design criteria. It successfully constructs the intermediate gear train needed within the gearbox. It provides graphical output to the user with primitive models of the gears, accessories and housing. Once located in engine coordinates, these primitives provide the reference for the next level for detailed design.

Vehicle Design Using High-fidelity Virtual Prototyping

1998 ◽  
Author(s):  
Jim Kozlowski ◽  
Chandra Prasad ◽  
Marc Serughetti
Keyword(s):  
Virtual Prototyping ◽  
Vehicle Design ◽  
High Fidelity

scholarly journals REVISITING PROTOTYPING IN 2020: A SNAPSHOT OF PRACTICE IN UK DESIGN COMPANIES

2021 ◽  
Vol 1 ◽  
pp. 2581-2590
Author(s):  
Mark Goudswaard ◽  
James Gopsill ◽  
Mike Harvey ◽  
Chris Snider ◽  
Andy Bell ◽  
...  
Keyword(s):  
3D Printing ◽  
Design Process ◽  
Process Model ◽  
Virtual Prototyping ◽  
South West ◽  
Industry Practice ◽  
The Media ◽  
Media Types ◽  
Design Process Model ◽  
The Uk

AbstractThe importance of prototyping is unanimous with numerous studies into the media, types, roles and properties of prototypes. However, no recent papers have sought to examine and characterise industry practice and if and how this has changed since the early 2000s.To address this, a snapshot of industrial prototyping practice with particular attention to the what, when, why, how, and by whom is reported. The study involved five small-medium sized design companies based in the South-West of the UK and validation of the findings by two independent practitioners.The snapshot revealed that 3D printing and virtual prototyping tools have reached widespread adoption in SMEs,that their design processes are highly agile and iterative and are difficult to fit to any extant design process model.Rather, the approaches appear to implicitly comprise of three levels of design convergence: macro, meso, and micro, which correspond to finer/more detailed changes.The results also reveal the frequent transitions between digital and physical media and the need to manage these transitions to ensure the product representations in different media are appropriately up-to-date.

Concept Exploration for a Mine-countermeasures Vessel Using a Packing-based Ship Synthesis Model

2015 ◽  
Author(s):  
Ruben J. Zandstra ◽  
Etienne A.E. Duchateau ◽  
Bart J. van Oers
Keyword(s):  
The Netherlands ◽  
Feasible Solution ◽  
Time Frame ◽  
Rapid Evaluation ◽  
Wide Range ◽  
Concept Exploration ◽  
Mine Countermeasures ◽  
Short Time ◽  
First Time

This paper presents a summary of a recent concept exploration effort for the replacement of the “Tri-Partite” class mine-hunters conducted at the Netherlands Ministry of Defense’s Defense Materiel Organization. Both the process and the ship synthesis model that were used are extensively discussed. Of particular interest is the process, as it is the first time that a novel type of “packing-based” ship synthesis model was applied to a Royal Netherlands Navy procurement project. In all, the application of this novel ship synthesis model was deemed successful. It enabled the rapid evaluation of a wide range of alternatives in a short time-frame. Most importantly, the results of the concept exploration effort aided in the search for a technically and financially feasible solution.

Green Communications

2013 ◽  
pp. 134-155
Author(s):  
Haris I. Volos ◽  
Dinesh Datla ◽  
Xuetao Chen ◽  
An He ◽  
Ashwin Amanna ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Carbon Footprint ◽  
Low Carbon ◽  
Wireless Devices ◽  
Green Communications ◽  
Trade Offs ◽  
Common Goals ◽  
Definition Of ◽  
Key Techniques ◽  
Wireless Infrastructure

The exponential growth of wireless systems makes their carbon footprint hard to ignore. This chapter presents statistics related to the energy consumption of cellular networks’ infrastructure in order to motivate the need for more efficient and environmentally friendly communications. A definition of the term “Green Communications” is provided along with different metrics that can be used to quantify energy efficiency for the various aspects of wireless infrastructure. In addition to topics related to cellular infrastructure, the chapter presents a brief review of key techniques that can be potentially used for improving energy efficiency. Furthermore, since improving energy efficiency is not by itself sufficient for low-carbon systems, possible ways of using and managing energy harvested from renewable sources such as solar and ambient RF signals are discussed. Moreover, the concept of Wireless Distributed Computing is introduced to illustrate how a group of wireless devices can share their resources for achieving a set of common goals. Finally, resource allocation is examined for managing the trade-offs involved when simultaneously minimizing the carbon footprint and performing the necessary communication and computation tasks in mobile devices.

PKM ANALYSIS AND DESIGN IN A VIRTUAL PROTOTYPING ENVIRONMENT

2002 ◽  
Vol 01 (02) ◽  
pp. 211-226
Author(s):  
GIACOMO BIANCHI ◽  
IRENE FASSI ◽  
LORENZO MOLINARI TOSATTI
Keyword(s):  
Virtual Prototyping ◽  
Analysis And Design ◽  
Mechanical Structure ◽  
Reachable Workspace ◽  
Industrial Adoption ◽  
Multi Body ◽  
Short Time

Industrial adoption of PKMs may be eased by the availability of methodologies and integrated tools able to analyze in a short time PKMs of any architecture, providing the key data needed to design the machine. The proposed Virtual Prototyping Environment for PKM Analysis answers to these requirements, quickly estimating not only the reachable workspace, the Jacobian conditioning, but also the actuators' effort, internal loads in the mechanical structure and the effects of lumped structural compliances. A description of the developed VPE-PKM, based on a commercial Multi-body package, is given. Its effectiveness is shown, presenting results obtained by ITIA-CNR during the design of a 3 dof translational PKM for light deburring operations.

The Development of Robot for Work of Drainpipe Deposit Cleaning

2013 ◽  
Vol 842 ◽  
pp. 558-563
Author(s):  
Feng Ping Xu ◽  
Yan Zhou ◽  
Zhi Cong Zhao
Keyword(s):  
Drag Force ◽  
Simulation Analysis ◽  
Virtual Prototyping ◽  
Pipe Diameter ◽  
Walk Distance ◽  
Walk Speed ◽  
Obstacle Crossing ◽  
Municipal Engineering ◽  
Key Techniques

According to the requirement of automatization of drainpipe deposit cleaning work in the municipal engineering works, a kind of robot for work of drainpipe deposit cleaning has been researched and manufactured with the simulation analysis and technique of virtual prototyping. In article the composition principle and key techniques of the robot are introduced in detail, including technique of adapting and adjusting the change of pipe diameter, technique of obstacle crossing, technique of walking and driving and so on. The manufactured prototype and results of tests show that the robot possesses characteristics, such as adapting range of pipe diameter is between 400~500mm, the walk speed when working is 2m/min, the drag force could reach 3000N above, and the walk distance could reach 1000m..

scholarly journals Cloud-based Design and Virtual Prototyping Environment for Embedded Systems

2016 ◽  
Vol 12 (09) ◽  
pp. 52 ◽  
Author(s):  
Stephan Werner ◽  
Andreas Lauber ◽  
Martijn Koedam ◽  
Juergen Becker ◽  
Eric Sax ◽  
...  
Keyword(s):  
Development Process ◽  
Design Space ◽  
Virtual Prototyping ◽  
Distributed Applications ◽  
Software Development Process ◽  
Design Environment ◽  
Time To Market ◽  
Fast Prototyping ◽  
Hardware Platforms ◽  
Short Time

The design and test of Multi-Processor System-on-Chips (MPSoCs) and development of distributed applications and/or operating systems executed on those hardware platforms is one of the biggest challenges in today’s system design. This applies in particular when short time-to-market constraints impose serious limitations on the exploration of the design space. The use of virtual platforms can help in decreasing the development and test cycles. In this paper, we present a cloud-based environment supporting the user in designing heterogeneous MPSoCs and developing distributed applications. Therefore, the design environment generates virtual platforms automatically allowing fast prototyping cycles especially in the software development process, and exports the design to a hardware flow synthesizing compatible FPGA designs. The extension of the peripheral models with debug information supports the developer during test and debug cycles and avoids the need of adding special debug codes in the application. This improves the <br />readability, portability and maintainability of produced software. Additionally, this paper presents the benefits of using cloud-based design environments in engineers’ trainings and educations. Therefore, the framework supports testing the system including complex software stacks with prerecorded data or testbenches.

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