Critical Design Issues of the ITER ECH Front Steering Upper Launcher

2008 ◽  
Vol 53 (1) ◽  
pp. 139-158 ◽  
Author(s):  
M. A. Henderson ◽  
R. Chavan ◽  
R. Bertizzolo ◽  
D. Campbell ◽  
J. Duron ◽  
...  
Keyword(s):  
Design Issues ◽  
Critical Design

Managing New Technologies in Conceptual Engineering Design, Demonstrated on Innovative Positive Displacement Device

2007 ◽  
Author(s):  
H. M. Roser ◽  
W. J. Dartnall
Keyword(s):  
Engineering Design ◽  
Development Time ◽  
Conceptual Development ◽  
New Technologies ◽  
Cost Effective ◽  
Evaluation Framework ◽  
Design Issues ◽  
Simple Method ◽  
Critical Design ◽  
Positive Displacement

In this work, a simple method is presented, assisting engineering designers in dealing with innovative technologies during the conceptual phase of engineering design. The technique emphasises on determining Critical Design Issues, as well as evaluating new technologies early on in order to define a Critical Design Path. Since time and budget constraints often demand prompt design decisions, a systematic, easy-to-follow concept analysis and evaluation framework is introduced, allowing engineers to quickly identify critical design issues. The proposed method is demonstrated using the conceptual development of an innovative positive displacement device as a case study. The study indicates that, particularly in absence of essential knowledge within early development stages, experimental design can provide a cost effective method of identifying potential design problems, and thus, reducing design iterations, development time and risk, as long as a suitable design process is also in place. The evaluation of potential design solutions can be achieved by conceptual prototypes, which may represent a specific critical technology, or embody initial ideas to quickly gain knowledge that is crucial for the development of new design concepts. This allows the designer to reduce intuition and guesswork, whilst detecting unanticipated effects and phenomena, delivering deeper insight and communicating ideas. The method proved to be a significant tool for rapid and goal-oriented conceptual design. Through the proliferation of recent prototyping technologies, along with a reduction of design iterations, the concepts could be developed and verified on a low budget over a short development time.

Space Station Maintenance Workstation Development

1993 ◽  
Vol 37 (1) ◽  
pp. 47-51
Author(s):  
Mihriban Whitmore ◽  
Randy B. Morris ◽  
Kent P. Vaubel ◽  
Frances E. Mount
Keyword(s):  
Computer Modeling ◽  
Space Station ◽  
Design Issues ◽  
Critical Design ◽  
Human Machine Interfaces ◽  
Work Volume ◽  
Work Area ◽  
Wide Range ◽  
Task Requirements ◽  
Microgravity Conditions

Space Station Maintenance Workstation will be used to support equipment servicing and repair operations. The Maintenance Workstation provides different work area configurations, giving open workbench or a contained area. Up to five operators can work at the workstation simultaneously. A series of Maintenance Workstation evaluations have been conducted at NASA Johnson Space Center to determine the critical design issues relating to human-machine interfaces. A primary goal of this work was to verify whether the proposed design accommodated a wide range of users and maintenance task requirements under microgravity conditions. The tests were conducted onboard NASA's KC-135 microgravity aircraft. Three crew and six non-crew subjects participated in the studies. Tasks performed during the evaluations consisted of reach sweeps, force/torque task, soldering, handling large objects and lens replacement. Each session was videotaped for post-flight observations. In addition, subjects were asked to fill out a questionnaire following the flight. These microgravity evaluations were complemented by the computer modeling of different statures to investigate the viewing, reach, and head clearances. Results indicate that the size and location of the glove ports, and the enclosed work volume are the critical design concerns. The approach, findings and implications of the study are discussed.

Critical design issues for the development of Smart Home technologies

2013 ◽  
Vol 11 (1) ◽  
pp. 72 ◽  
Author(s):  
Sam Solaimani ◽  
Harry Bouwman ◽  
Fernando Secomandi
Keyword(s):  
Smart Home ◽  
Design Issues ◽  
Critical Design

scholarly journals Design of a novel inchworm in-pipe robot based on cam-linkage mechanism

2021 ◽  
Vol 13 (9) ◽  
pp. 168781402110451
Author(s):  
Qizhi Xie ◽  
Songyong Liu ◽  
Xiliang Ma
Keyword(s):  
Driving Ability ◽  
Design Issues ◽  
Linkage Mechanism ◽  
Critical Design ◽  
Pressure Angle ◽  
Manual Adjustment ◽  
Automatic Adaptation ◽  
Support Motion

This paper presents a novel double-direction inchworm in-pipe robot, called the Cam-Linkage Robot (CLR), used to carry sensors and instruments to perform inspection and cleaning jobs inside pipelines. The prototype has been developed to improve the driving ability and reduce the difficulty of control. CLR is suitable for pipe diameters from 360 mm to 400 mm due to its functions of manual adjustment and automatic adaptation. The structure of CLR was presented and some critical design issues on the principle of cam-linkage mechanism were discussed. Based on cam-linkage mechanism, CLR could press the wall actively and creep in two directions via only one motor, so this research has broken the limitation that traditional active wall-press robot needs more than one actuator. The cam pressure angle could be reduced to 0, and the propulsion ability was almost not weakened by the support motion at the stable support stage. Finally, experiments were conducted to validate the locomotion principle and the effectiveness of CLR.

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