Conceptual Design of Fixed Center Steering Wheels

2008 ◽  
Author(s):  
Fang-Fu Guo ◽  
Hong-Sen Yan ◽  
Chao-Chieh Lan ◽  
Shin-Tsung Huang
Keyword(s):  
Conceptual Design ◽  
Creative Design ◽  
Design Concepts ◽  
Design Specifications ◽  
Design Requirements ◽  
Topological Characteristics ◽  
Fixed Center

Various patents relating fixed center steering wheels are studied. The corresponding topological characteristics, design specifications, and design requirements and constraints of mechanisms are concluded. A methodology for the creative design of mechanisms is applied to generate all possible design concepts of mechanisms subjected to the concluded design requirements and constraints. In conclusion, 29 new design concepts of fixed center steering wheels are synthesized.

APPLICATION OF FUNCTIONAL ELEMENTS TO THE CONCEPTUAL DESIGN OF INNOVATIVE HUMAN-POWERED VEHICLES

2017 ◽  
Vol 41 (3) ◽  
pp. 489-497
Author(s):  
Nien-Te Liu ◽  
Chang-Tzuoh Wu ◽  
Yung-Chun Lin
Keyword(s):  
Conceptual Design ◽  
Study Design ◽  
Functional Elements ◽  
Case Study Design ◽  
Design Concepts ◽  
Design Requirements ◽  
Human Powered

The purpose of this paper is to propose a simple and quick process for creating new design concepts for human-powered vehicles. First, the design theme for an innovative bicycle is described. Next, the functional elements of the bicycle are selected according to the contents described in the design theme. Based on the design requirements, various spatial arrangements of the creative functional elements are produced. In the final step, we followed the flowchart of the creative functional elements constructed by this research and demonstrated a case study design.

Exploiting Critical Path Method for Evaluation of Conceptual Design

2010 ◽  
Vol 97-101 ◽  
pp. 4429-4432 ◽  
Author(s):  
Mei Yan Wang ◽  
Lian Guan Shen ◽  
Yi Min Deng
Keyword(s):  
Conceptual Design ◽  
Critical Path ◽  
Design Concept ◽  
Design Evaluation ◽  
Critical Path Method ◽  
Design Concepts ◽  
Critical Design ◽  
Concept Evaluation ◽  
Design Requirements

Conceptual design is a critical design phase during which initial design solutions, called design concepts, are developed. These design concepts must be evaluated to ensure they satisfy the specified design requirements and the most appropriate design concept must be selected. It is often difficult for the designer, especially for the novice, to make an appropriate design concept evaluation and selection. Existing work on design evaluation lacks an effective tool for evaluating the temporal performance of the design concepts. To address this problem, a Critical Path Method (CPM) from project management is adapted for design evaluation, whereby a CPM network is converted from a causal behavioral process (CBP) and the methodologies relating to CPM are also applied to design improvement. A case study of a lever-clamp assembly system is also presented to illustrate as well as validate the method.

A Formal Approach to Specifications in Conceptual Design

1992 ◽  
Vol 114 (4) ◽  
pp. 659-666 ◽  
Author(s):  
A. Kusiak ◽  
E. Szczerbicki
Keyword(s):  
Artificial Intelligence ◽  
Key Words ◽  
Conceptual Design ◽  
Design Process ◽  
Formal Method ◽  
Functional Space ◽  
Synthesis Process ◽  
Formal Approach ◽  
Design Specifications ◽  
Design Requirements

In this paper, a methodology for the specification stage in conceptual design is presented. The specification stage provides requirements and transforms them into functions of the designed object. It occurs at the highest level of abstraction and it must provide enough information for the synthesis process where functions are transformed into design components that are further synthesized into the designed object. The proposed approach includes the following issues: specification of requirements, specification of functions, incorporation of logic into functional and requirement trees, representation of requirements-functions interaction, and optimization in the functional space. The methodology presented is illustrated with examples. Key words: design requirements, design specifications, conceptual design, design process, artificial intelligence, formal method

Conceptual Design and Feasibility Study for FAil-Safe Simple Economical SMR (FASES) System

2014 ◽  
Author(s):  
Ho Sik Kim ◽  
Hee Cheon No
Keyword(s):  
Conceptual Design ◽  
Feasibility Study ◽  
Cooling System ◽  
Heat Removal ◽  
Operating Conditions ◽  
Design Concepts ◽  
Decay Heat ◽  
Design Requirements ◽  
Core Cooling ◽  
Fail Safe

Because of high marketability of SMR, although many countries are trying to develop SMR, the SMR market is not formed yet. For early dominance of SMR market, the SMR system should be fail-safe, simple and economical. In order to develop FAil-safe Simple Economical SMR (FASES) system we applied the design characteristics of HTGRs into water-cooled reactors. In this study, we performed conceptual design and feasibility study for the FASES system. The feasibility study is focused on a thermal-hydraulic aspect in normal operating conditions and several accident conditions. The key design characteristic of the FASES system obtained from design concepts is to have sufficient decay heat removal capability even in the accidents involving extended station blackout (SBO), failure of passive decay heat removal system (PDHRS), and failure of emergency core cooling system (ECCS). Based on the design concepts, we could define several thermal-hydraulic design requirements. Then, we performed thermal-hydraulic analysis for feasibility study and proposed the specific design of the FASES system satisfying several design requirements.

scholarly journals Metrics for Measuring Sustainable Product Design Concepts

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3469
Author(s):  
Ji Han ◽  
Pingfei Jiang ◽  
Peter R. N. Childs
Keyword(s):  
Product Design ◽  
End Of Life ◽  
Environmental Impacts ◽  
Conceptual Design ◽  
Design Stage ◽  
Sustainable Product Design ◽  
Early Design ◽  
Design Concepts ◽  
Concept Evaluation ◽  
Sustainable Product

Although products can contribute to ecosystems positively, they can cause negative environmental impacts throughout their life cycles, from obtaining raw material, production, and use, to end of life. It is reported that most negative environmental impacts are decided at early design phases, which suggests that the determination of product sustainability should be considered as early as possible, such as during the conceptual design stage, when it is still possible to modify the design concept. However, most of the existing concept evaluation methods or tools are focused on assessing the feasibility or creativity of the concepts generated, lacking the measurements of sustainability of concepts. The paper explores key factors related to sustainable design with regard to environmental impacts, and describes a set of objective measures of sustainable product design concept evaluation, namely, material, production, use, and end of life. The rationales of the four metrics are discussed, with corresponding measurements. A case study is conducted to demonstrate the use and effectiveness of the metrics for evaluating product design concepts. The paper is the first study to explore the measurement of product design sustainability focusing on the conceptual design stage. It can be used as a guideline to measure the level of sustainability of product design concepts to support designers in developing sustainable products. Most significantly, it urges the considerations of sustainability design aspects at early design phases, and also provides a new research direction in concept evaluation regarding sustainability.

A Web-Based Process/Material Advisory System

2000 ◽  
Author(s):  
Yusheng Chen ◽  
Satyandra K. Gupta ◽  
Shaw Feng
Keyword(s):  
Conceptual Design ◽  
Cost Effective ◽  
Design Stage ◽  
Material Combination ◽  
Web Based ◽  
Advisory System ◽  
Conceptual Design Stage ◽  
Design Requirements ◽  
Parameter Ranges ◽  
Process Material

Abstract This paper describes a web-based process/material advisory system that can be used during conceptual design. Given a set of design requirements for a part during conceptual design stage, our system produces process sequences that can meet the design requirements. Quite often during conceptual design stage, design requirements are not precisely defined. Therefore, we allow users to describe design requirements in terms of parameter ranges. Parameter ranges are used to capture uncertainties in design requirements. Our system accounts for uncertainties in design requirements in generating and evaluating process/material combinations. Our system uses a two step algorithm. During the first step, we generate a material/process option tree. This tree represents various process/material options that can be used to meet the given set of design requirements. During the second step, we evaluate various alternative process/material options using a depth first branch and bound algorithm to identify and recommend the least expensive process/material combination to the designer. Our system can be accessed on the World Wide Web using a standard browser. Our system allows designs to consider a wide variety of process/material options during the conceptual design stage and allows them to find the most cost-effective combination. By selecting the process/material combination during the early design stages, designers can ensure that the detailed design is compatible with all of the process constraints for the selected process.

Prewhirl an Added Degree of Freedom to the Designer of Small Single-Shaft Gas Turbines

1967 ◽  
Vol 89 (1) ◽  
pp. 83-85
Author(s):  
A. R. Shouman
Keyword(s):  
Gas Turbines ◽  
Degree Of Freedom ◽  
Design Specifications ◽  
Compressor Inlet ◽  
Design Requirements

The possibility of the advantageous use of adjustable guidevanes in the compressor inlet for the control of single-shaft gas turbines is discussed. Considering certain design specifications that are impossible to be met by a fixed-geometry, single-shaft machine, it is pointed out how the design specifications can be met utilizing an inlet guidevane system. This is merely used as an example to point out the possible merits of such a system and that it may allow the designer to meet some extraordinary design requirements.

Creative Design of Metal Can Crushers with Eight Links

2006 ◽  
Vol 505-507 ◽  
pp. 925-930 ◽  
Author(s):  
Wen Hsiang Hsieh ◽  
Tien Sheng Chang
Keyword(s):  
Creative Design ◽  
Design Constraints ◽  
Structure Of Metal ◽  
Design Requirements

The purpose of this paper is to synthesize the structure of metal cans squeezing devices with eight links based on the methodology of creative design. First, the design requirements and design constraints are specified based on the characteristic of existing squeezing devices. Then, specializing with respect to (8, 10) generalized chains, the atlas of specialized feasible chain is generated. Furthermore, the atlas of new design is obtained through the process of particularization. Finally, the atlas of new design with single toggle effect is also synthesized. In addition, the feasibility of the design is verified by a prototype machine testing.

Conceptual Design of Gear Differentials for Automotive Vehicles

1994 ◽  
Vol 116 (2) ◽  
pp. 565-570 ◽  
Author(s):  
Hong-Sen Yan ◽  
Long-Chang Hsieh
Keyword(s):  
Conceptual Design ◽  
Degrees Of Freedom ◽  
Planetary Gear ◽  
Gear Train ◽  
Design Constraints ◽  
Two Degrees Of Freedom ◽  
Design Concepts ◽  
Planetary Gear Trains ◽  
Gear Trains ◽  
Gear Differential

An automotive gear differential is a joint-fractionated planetary gear train with two degrees-of-freedom. We summarize the characteristics of planetary gear trains and the design constraints of noncoupled automotive gear differentials to synthesize their corresponding kinematic graphs. Based on these graphs and the proposed respecializing process, we generate the atlas of design concepts for automotive gear differentials with any types of gear pairs. As a result, there are 4, 25, and 156 design concepts for five-, six-, and seven-bar automotive gear differentials, respectively.

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