An Integrated, Computer-Based Method for Rapid-Prototyping Weapons-Scale Marine Propulsors Using Stereolithography

1997 ◽  
Author(s):  
Robert M. Koch
Keyword(s):  
Rapid Prototyping ◽  
Design Process ◽  
Structural Design ◽  
Development Time ◽  
Underwater Vehicles ◽  
Process Efficiency ◽  
Two Phase ◽  
Unmanned Underwater Vehicles ◽  
Reduce Development Time ◽  
Computer Based

Abstract The present work describes an integrated, two-phase computer-based method for fabricating marine propulsors using stereolithography. This new methodology seamlessly integrates stereolithography rapid prototyping techniques with the hydrodynamic design, structural design, and prototype testing of advanced marine propulsors in order to greatly increase the design process efficiency and reduce development time. Its use as applied to the design, fabrication, and testing of advanced propulsor prototypes for small weapon’s-scale undersea vehicles (e.g., Unmanned Underwater Vehicles (UUVs), lightweight and heavyweight torpedoes, etc.) is described in order to demonstrate specific strengths of the new method.

Design for Manufacture Using Functional Analysis and CAD Mould Simulation for Rapid Prototyping and Rapid Tooling

2012 ◽  
Author(s):  
Mihaela E. Lupeanu ◽  
Hadley Brooks ◽  
Allan E. W. Rennie ◽  
H. Kursat Celik ◽  
Corneliu Neagu ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Rapid Prototyping ◽  
Design Process ◽  
Rapid Tooling ◽  
Production Costs ◽  
Process Efficiency ◽  
Rapid Manufacturing ◽  
Design For Manufacture ◽  
Starting Point ◽  
Innovative Solutions

The pressure of time, quality and cost, together with increasing product variety, more customised products and worldwide competition is driving technology development and implementation in the area of Rapid Manufacturing (RM). Traditionally, the manufacture of tooling for both prototype parts and production components represents one of the longest and most costly phases in the development of most new products. The cost and time implications of the tooling process are particularly problematic for low-volume products aimed at niche markets, or alternatively for rapidly changing high-volume products. Rapid Prototyping (RP) and Rapid Tooling (RT) have the potential to dramatically shorten the time required to produce functional prototypes or products. Functional Analysis (FA) plays a key role in the design process of the actual tools, allowing for innovative solutions that can be achieved with RP and RT. This paper presents a FA methodology to design for manufacture (DFM) based on RP- and RT-specific characteristics, aimed at improving process efficiency, streamline energy consumption, use of volume material, usage of structural innovative lightweight materials, decrease overall costs and improve product quality. Design for Rapid Manufacturing (DFRM) allows for geometric freedom, leading to changes of the overall design process, thus enhancing the FA process. FA begins with stating the need, in a DFRM case that translates into diagnosis, the determination of the manufacturability of the present product and comparison with similar products on the market. Setting objectives, in terms of production costs, quality, flexibility, risk, lead-time, efficiency, and environment are other milestones in FA. Actual function definition involves defining the main functions of the product and their interactions. Clarifying the evaluation parameters, setting criteria levels and technical dimensioning is done for each of the main product functions. The conceptual design process then follows a top-down sequence: corporate, family, structural and component levels. Evaluation and selection of the optimal concept resulting from the FA consists of assessing the manufacturability of the proposed concepts in terms of the DFM objectives. The selected best fit concept is translated to design in the last stage, when the chosen concept is communicated to the development team. The detailed design is carried out in parallel to marketing and product development. Targeted FA is shown to enable generation of innovative solutions, while improving manufacturability. The present research stands as a starting point in the development of product design methodologies that use RP and RT applications for manufacturing physical products.

scholarly journals Application of Requirements Engineering in the Development of a Universal Basic Platform of a Four-axle Locomotive

2020 ◽  
Author(s):  
A.K. Friesen
Keyword(s):  
Life Cycle ◽  
Optimal Design ◽  
Requirements Engineering ◽  
Design Process ◽  
Development Time ◽  
Systematic Approach ◽  
System Engineering ◽  
Cycle System ◽  
Reduce Development Time ◽  
The Cost

The article presents the practice of using system methods in the development of a universal four-axle locomotive platform. The work is aimed at developing the optimal design of the frame and bodies of the locomotive, the choice of power and traction components to simplify the design process, reduce development time and reduce the cost of the product. The advantages of applying a systematic approach to working with requirements, determining the necessary functions and forming the structure of the product are described. Keywords: locomotive, frame, life cycle, system engineering, requirements, modularity, universal platform, shortening the development time.

Unmanned Underwater Drone Design for Ocean Exploration

2018 ◽  
Author(s):  
Rojitha Goonesekere ◽  
Yu Guo
Keyword(s):  
Design Process ◽  
Water Mass ◽  
Underwater Vehicle ◽  
Underwater Vehicles ◽  
Ocean Dynamics ◽  
Unmanned Underwater Vehicles ◽  
Ocean Exploration ◽  
The Masses ◽  
Human Kind

Human kind has always been intrigued by space but what seems to not make sense is why we aren’t just as intrigued about our ocean. As the life blood of all things on earth we need to understand the approximate 71% of water mass that surrounds us [1]. This is the goal of our paper, bringing interest back to the ocean using unmanned underwater vehicles. In this paper we will discuss the functionality, build and deployment of an intelligent unmanned drone. The mission of this underwater vehicle is to explore the ocean to understand complex ocean dynamics and bring forth the wonders of the ocean to the masses. We will systematically break down the design process of our drone circuitry and sensors on board, then see why we chose these components and sensors to successfully achieve our objective of collecting targeted data from the ocean.

Experimental Study of Command Governor Adaptive Control for Unmanned Underwater Vehicles

2019 ◽  
Vol 27 (1) ◽  
pp. 332-345 ◽  
Author(s):  
Charita Darshana Makavita ◽  
Shantha Gamini Jayasinghe ◽  
Hung Duc Nguyen ◽  
Dev Ranmuthugala
Keyword(s):  
Experimental Study ◽  
Adaptive Control ◽  
Underwater Vehicles ◽  
Unmanned Underwater Vehicles

Electronic Sensor Design Principles

2021 ◽  
Author(s):  
Marco Tartagni
Keyword(s):  
Graduate Students ◽  
Design Process ◽  
Interdisciplinary Approach ◽  
Process Efficiency ◽  
Sensor Design ◽  
Overall Design ◽  
Electronic Sensor ◽  
Speed Up ◽  
Design Requirements ◽  
Electronic Sensors

Get up to speed with the fundamentals of electronic sensor design with this comprehensive guide, and discover powerful techniques to reduce the overall design timeline for your specific applications. Includes a step-by-step introduction to a generalized information-centric approach for designing electronic sensors, demonstrating universally applicable practical approaches to speed up the design process. Features detailed coverage of all the tools necessary for effective characterization and organization of the design process, improving overall process efficiency. Provides a coherent and rigorous theoretical framework for understanding the fundamentals of sensor design, to encourage an intuitive understanding of sensor design requirements. Emphasising an integrated interdisciplinary approach throughout, this is an essential tool for professional engineers and graduate students keen to improve their understanding of cutting-edge electronic sensor design.

A Ballast System for Automated Deep-Sea Ascents

2016 ◽  
Author(s):  
Matthias Golz ◽  
Florin Boeck ◽  
Sebastian Ritz ◽  
Gerd Holbach
Keyword(s):  
Environmental Impact ◽  
Environmental Contamination ◽  
Pressure Vessel ◽  
Deep Sea ◽  
Underwater Vehicles ◽  
Compressed Air ◽  
Hydraulic Pump ◽  
Unmanned Underwater Vehicles ◽  
The Past ◽  
Set Up

The efforts to discover the world’s oceans — even in extremely deep-sea environments — have grown more and more in the past years. In this context, unmanned underwater vehicles play a central role. Underwater systems that are not tethered need to provide an apparatus to ensure a safe return to the surface. Therefore, positive buoyancy is required and can be achieved by either losing weight or expanding volume. A conservative method is the dropping of ballast weight. However, nowadays this method is not appropriate due to the environmental impact. This paper presents a ballast system for an automated ascent of a deep-sea seabed station in up to 6000 m depth. The ballast system uses a DC motor driven modified hydraulic pump and a compressed air auxiliary system inside a pressure vessel. With regard to the environmental contamination in case of a leakage, only water is used as ballast fluid. The modification of an ordinary oil-hydraulic radial piston pump and the set-up of the ballast system is introduced. Results from sea trials in the Atlantic Ocean are presented to verify the functionality of the ballast system.

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