scholarly journals The Advanced Technology Corvette - Railgun (ATK-R) Design Study - Future Weapons and Small Ship Power Systems

2018 ◽  
Author(s):  
R J Pawling ◽  
L Farrier ◽  
R Bucknall
Keyword(s):  
Power Systems ◽  
High Power ◽  
Energy Levels ◽  
Design Tool ◽  
Advanced Technology ◽  
Concept Design ◽  
Design Study ◽  
Propulsion Systems ◽  
Design Studies ◽  
Marine Engineering

High-power electric weapons, such as the ElectroMagnetic RailGun (EMRG), laser and High Power Microwave devices are moving closer to practical utilisation by navies, and prototype EMRG systems are being tested at militarily useful energy levels. Previous work in the UCL Department of Mechanical Engineering includes; preliminary design studies for surface combatants with an all electric weapons outfit; and detailed marine engineering analysis, to PhD level, of the implications for future power and propulsion systems of these weapons. Design studies for electrically armed ships have generally examined large destroyer-sized surface combatants, with significant installed electrical power. This paper describes a concept design study for a small corvette-sized combatant, ATK-R, developed as the “minimum sized ship” capable of supporting an EMRG as its primary armament This paper describes the UCL ZEOLIT design tool, the ship design impacts and marine engineering integration of this future concept including the use of Energy Storage Systems (ESS) and the choice between power limited (Patrol vessel -like) and power dense (Fast attack craft –like) power and propulsion systems. 

scholarly journals A Facility for Testing High-Power Electric Propulsion Systems in Space - A Design Study

2005 ◽  
Author(s):  
Andrew Petro ◽  
Franklin Chang-Diaz ◽  
Charles Sarmiento ◽  
Greg Chavers ◽  
Neil Lemmons ◽  
...  
Keyword(s):  
High Power ◽  
Electric Propulsion ◽  
Design Study ◽  
Propulsion Systems

Sentiment Analysis of Participant Comments in a User Centered Design Study for Degraded Visual Environment Sensor Visualization

2020 ◽  
Vol 64 (1) ◽  
pp. 2075-2078
Author(s):  
Bradley M. Davis ◽  
Samineh C. Gillmore ◽  
Derek Millard
Keyword(s):  
Sentiment Analysis ◽  
The Other ◽  
Visual Environment ◽  
User Centered Design ◽  
Design Study ◽  
Design Studies ◽  
Analysis Technique ◽  
Media Research ◽  
Social Media Research ◽  
User Centered

Several methodologies in user centered research lead to the collection of large amounts of comments about a product or system. The growth of social media research has led to the development of sentiment analysis algorithms that computationally analyze the meaning of text. This paper utilized the Valence Aware Dictionary for sEntiment Reasoning (VADER) sentiment analysis technique to assess comments from a user centered design study for a rotorcraft degraded visual environment mitigation system. The sentiment analysis findings mirror results from the other measures of the user centered design study. This paper supports the use of sentiment analysis for large volumes of comment data from user centered design studies.

Expectations and Recent Experience for Gas Turbine Reliability, Availability, and Maintainability (RAM)

2007 ◽  
Author(s):  
Robert F. Steele ◽  
Dale C. Paul ◽  
Torgeir Rui
Keyword(s):  
Power Systems ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Advanced Technology ◽  
Recent Experience ◽  
Reliability Growth ◽  
Market Place ◽  
New Product Introductions ◽  
Low Emission ◽  
The Cost

Since the early 1990’s there have been significant changes in the gas turbine, and power generation market place. The ‘F-Class’ Gas Turbines, with higher firing temperatures, single crystal materials, increased compressor pressure ratios and low emission combustion systems that were introduced in the early 1990’s have gained significant field experience. Many of the issues experienced by these new product introductions have been addressed. The actual reliability growth and current performance of these advanced technology machines will be examined. Additionally, the operating profiles anticipated for many of the units installed during this period has been impacted by both changes in the anticipated demand and increases in fuel costs, especially the cost of natural gas. This paper will review how these changes have impacted the Reliability, Availability, and Maintainability performance of gas turbines. Data from the ORAP® System, maintained by Strategic Power Systems, Inc, will be utilized to examine the actual RAM performance over the past 10 to 15 years in relation to goals and expectations. Specifically, this paper will examine the reliability growth of the F-Class turbines since the 1990’s and examine the reliability impact of duty cycle on RAM performance.

Design Methodology for Fluid Power Systems Using Hypermedia

1999 ◽  
Author(s):  
Edmund J. Hughes ◽  
Thomas G. Richards ◽  
Derek G. Tilley
Keyword(s):  
Power Systems ◽  
Power System ◽  
System Design ◽  
Good Practice ◽  
Practical Experience ◽  
Design Tool ◽  
Fluid Power ◽  
Specific Information ◽  
Fluid Power System ◽  
Fluid Power Systems

Abstract Fluid power system design is a skilful and complex task requiring significant practical experience and heuristic knowledge gained over many years. Industries specifying and/or designing fluid power systems in their products are at risk should they lose key personnel with this knowledge. This problem is compounded by a lack of formal training at the graduate level, creating a shortfall in qualified fluid power designers. Design support tools that assist and guide designers in their work, as part of a Concurrent Engineering approach, should be capable of providing both good practice guidance and a framework into which product specific information can be stored for later reuse. This paper discusses the early development of a fluid power system design tool that seeks to offer this support using a methodology developed in hypermedia.

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