Fuzzy Information Axiom in Conceptual Design Scheme Evaluation of Handling Equipments

2012 ◽  
Vol 605-607 ◽  
pp. 263-266 ◽  
Author(s):  
Qin He ◽  
Rui Jun Zhang ◽  
Nan Guo ◽  
Dong Sheng Cong ◽  
Ji Wei Qiu
Keyword(s):  
Optimal Design ◽  
Evaluation Method ◽  
Theoretical Foundation ◽  
Concept Design ◽  
Fuzzy Information ◽  
Product Concept ◽  
Design Scheme ◽  
Fuzzy Language ◽  
Information Axiom ◽  
Scheme Evaluation

Applying fuzzy information axiom in product concept design, the evaluation method for design schemes based on fuzzy information axiom was built and the insufficient of estimation in qualitative indexes was overcome. Actual membership function curve was selected conform to different index types, and fuzzy language of qualitative indexes is numerical. Through computing information content of each product scheme, the optimal scheme was selected with the unified metrics. The model was applied in scheme evaluation of handling equipment in stereo garage and its effectiveness was verified. Meanwhile, the optimal design scheme of handling equipment in vertical rotary stereo garage was obtained and the theoretical foundation was provided for handing equipment.

The Application of Gray Clustering and Information Axiom Integrated in the Scheme Evaluation of Mechanical Products

2012 ◽  
Vol 605-607 ◽  
pp. 127-132 ◽  
Author(s):  
Ji Wei Qiu ◽  
Rui Jun Zhang ◽  
Xin Xin Si
Keyword(s):  
Evaluation Method ◽  
Evaluation Process ◽  
Evaluation Index System ◽  
Computational Formula ◽  
Optimal Scheme ◽  
Evaluation Indexes ◽  
Design Scheme ◽  
Information Axiom ◽  
Qualitative Index ◽  
Scheme Evaluation

To construct the rational and scientific design scheme evaluation method for a target, on the basis of researching on the complement of the gray clustering theory and information axiom, applying the combination in the design scheme evaluation, a scheme evaluation method based on the grey clustering and information axiom integrated is put forward. Aiming at the defect of obtaining difficulty for evaluation indexes, the evaluation index system is constructed by using the analytical hierarchy process. Aiming at the shortcoming that qualitative indexes are not be evaluated by information axiom, the qualitative index is whitened by using the triangle whiten weight function. At the same time, the computational formula of the information amount is improved, and the design scope and system scope of design scheme are extended to make the calculation results more actual. The weight of each index in the evaluation process isn’t needed to provide, and the subjective judgment is avoided on the influence of the evaluation results. Taking the process of obtaining the optimal scheme for the mechanical parking equipment as an example, the proposed method is analysis verified. The application examples show that the optimal scheme satisfying user needs is got in a relatively short time by using this evaluation method and a theoretical basis is provided for the establishment of a scientific and rational evaluation method.

A Novel Approach for Product Design Scheme Evaluation with Non-Functional Attributes

2013 ◽  
Vol 411-414 ◽  
pp. 2511-2515
Author(s):  
Hou Xing You
Keyword(s):  
Product Design ◽  
Information Content ◽  
Design Theory ◽  
Axiomatic Design ◽  
Experimental Result ◽  
Design Scheme ◽  
Functional Attributes ◽  
Information Axiom ◽  
Axiomatic Design Theory ◽  
Scheme Evaluation

Axiomatic design theory is a popular methodology for product design scheme evaluation in recent years. However, as information axiom has some limitation for information content of non-functional attributes, the application of axiomatic design theory is bound. Therefore, a new method is proposed for product design scheme evaluation in this paper, which is the generalized information content calculation, and the proposed method avoids the shortcoming of traditional information content calculations. Finally, the proposed method is applied in a case study, and experimental result shows the feasibility of the proposed method.

scholarly journals Conceptual Design Evaluation Considering Confidence Based on Z-AHP-TOPSIS Method

2021 ◽  
Vol 11 (16) ◽  
pp. 7400
Author(s):  
Qinghua Liu ◽  
Jiadui Chen ◽  
Weixing Wang ◽  
Qing Qin
Keyword(s):  
Decision Making ◽  
Conceptual Design ◽  
Evaluation Method ◽  
Evaluation Criteria ◽  
Design Evaluation ◽  
Design Decision ◽  
Concept Design ◽  
Customer Requirements ◽  
Factors Affecting ◽  
Design Scheme

In concept design, effective decision making and management of schemes can shorten the design cycle and improve product quality. The decision maker (DM)’s confidence is one of the critical factors affecting the conceptual design evaluation. Although many studies use quantitative linguistic evaluation for design scheme decision-making, which improves product conceptual design decision-making efficiency and effectiveness, few studies consider the confidence level of a decision. A conceptual design evaluation method based on Z-numbers is proposed to solve this problem, considering the customer requirements and the DM’s confidence. Firstly, the evaluation criteria are determined by analyzing customer requirements; then, the fuzzy analytic hierarchy process in the Z-numbers environment (Z-AHP) is used to determine the criteria weight; Finally, the fuzzy technique for order preference by similarity to ideal solution method in the Z-numbers environment (Z-TOPSIS) is used to evaluate the design schemes to obtain the optimal scheme. The proposed method is applied to the selection of the design scheme of the waste containers in the kitchen. The results show that considering the DM’s self-confidence can achieve a more reasonable and practical evaluation of the conceptual design scheme, and it is easier to obtain the best scheme.

The Study of Mechanical Product Concept Design Method Based on Reverse Engineering

2010 ◽  
Vol 97-101 ◽  
pp. 3731-3736
Author(s):  
Pei Gang Li ◽  
Xian Ying Feng ◽  
Xiao Xia Shen ◽  
Cheng Liang Zhang
Keyword(s):  
Reverse Engineering ◽  
Product Information ◽  
Design Method ◽  
Mapping Function ◽  
Information Organization ◽  
Concept Design ◽  
New Approach ◽  
Product Concept ◽  
Product Information Model ◽  
Effective Carrier

The mechanical product concept design method based on reverse engineering (RE) is a new approach in the concept design domain. The functional pattern is thought as an effective carrier and medium of mapping function to structure, which provides an efficient path for expressing the intrinsic evolution rule of the complex mechanical qualitative structure. And it is used as the information organization unit and the assembly product information model, which could give some help to express the design knowledge effectively. Therefore, we proposed a mechanical product concept design method based on RE. The examples indicated that this method is feasible and it provides a practical technical way for the knowledge reuse and continue innovation of the existence products.

COVIRDS: Shape Modeling in a Virtual Reality Environment

1997 ◽  
Author(s):  
Tushar H. Dani ◽  
Chi-Cheng P. Chu ◽  
Rajit Gadh
Keyword(s):  
Computer Aided Design ◽  
Visual Display ◽  
Design Stage ◽  
Design System ◽  
Concept Design ◽  
Virtual Design ◽  
Cad Systems ◽  
Product Concept ◽  
Shape Models ◽  
Solid Models

Abstract Rapid shape creation and visualization of solid models remains a tedious task despite advances in the field of Computer Aided Design (CAD)/Solid Modeling. CAD systems require a significant level of detail, such as vertices, edges, and faces to be specified by the user, even before the simplest of shapes can be created and viewed. In addition, most CAD systems have an essentially 2D interface for designing artifacts. This makes artifact visualization, for example by interactive rotation, difficult since all manipulations have be achieved by 2D translation of the mouse or by typing in the required angles of rotation. The limited visualization capability and the requirement to create shapes through the specification of low level entities is especially cumbersome in the concept shape design stage. This paper describes the Conceptual Virtual Design System, COVIRDS, a tool for product concept design. COVIRDS provides an intuitive voice and hand input-based interface for modeling of products using a ‘construction’ approach. Product shape models are created by ‘attaching’ simpler parametrically defined ‘Shape Elements’ to other elements to create more complex models. Voice commands are used to instantiate shape elements and change their parameters, for example, the width, length and height of a block element. 3D hand input is used for positioning shape elements during element attachment. The voice and hand input-based interface together with a stereoscopic visual display facilitates rapid creation and visualization of concept shape models.

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