scholarly journals Explicit Communication of Geometric Design Intent in CAD: Evaluating Annotated Models in the Context of Reusability

2014 ◽  
Author(s):  
Jorge Camba ◽  
Manuel Contero ◽  
Jeffrey Otey ◽  
Pedro Company
Keyword(s):  
Geometric Design ◽  
Design Knowledge ◽  
Cad Model ◽  
User Performance ◽  
Direct Manipulation ◽  
Design Decisions ◽  
Design Intent ◽  
Design Information ◽  
Improve Design ◽  
Explicit Communication

CAD model reusability is largely determined by a proper communication of design intent, which is usually expressed implicitly within the model. Recent studies have suggested the use of 3D annotations as a method to embed design information in the model’s geometry and make part of the design knowledge explicitly available. In this paper, we evaluate the effectiveness of this method and analyze its impact in model alteration tasks. Our goal is to determine whether annotated models provide significant benefits when performing activities that require a direct manipulation of the geometry. We present the results of a study that measured user performance in two scenarios. First, we tested whether annotations are helpful when inadequate modeling assumptions can be made by designers. Second, we evaluated annotations as tools to communicate design decisions to select the most appropriate solution to a challenge when multiple options are available. In both cases, results show statistically significant benefits of annotated models, suggesting the use of this technique as a valuable approach to improve design intent communication.

Development of CAD Model Annotation System Based on Design Intent

2017 ◽  
Vol 863 ◽  
pp. 368-372
Author(s):  
Qin Yi Ma ◽  
Li Hua Song ◽  
Da Peng Xie ◽  
Mao Jun Zhou
Keyword(s):  
Product Design ◽  
3D Model ◽  
Adaptive Design ◽  
Design Knowledge ◽  
Cad Model ◽  
Design Intent ◽  
Design Information ◽  
Annotation System ◽  
Modeling Analysis ◽  
Model Annotation

Most of the product design on the market is variant design or adaptive design, which need to reuse existing product design knowledge. A key aspect of reusing existing CAD model is correctly define and understand the design intents behind of existing CAD model, and this paper introduces a CAD model annotation system based on design intent. Design intents contained all design information of entire life cycle from modeling, analysis to manufacturing are marked onto the CAD model using PMI module in UG to improve the readability of the CAD model. Second, given the problems such as management difficulties, no filter and retrieval functions, this paper proposes an annotation manager system based on UG redevelopment by filtration, retrieval, grouping and other functions to reduce clutter on the 3D annotations and be convenient for users to view needed all kinds of annotations. Finally, design information is represented both internally within the 3D model and externally on a XML file.

scholarly journals Extended 3D annotations as a new mechanism to explicitly communicate geometric design intent and increase CAD model reusability

2014 ◽  
Vol 57 ◽  
pp. 61-73 ◽  
Author(s):  
Jorge Camba ◽  
Manuel Contero ◽  
Michael Johnson ◽  
Pedro Company
Keyword(s):  
Geometric Design ◽  
Cad Model ◽  
Design Intent

Personalized knowledge push system based on design intent and user interest

2015 ◽  
Vol 230 (11) ◽  
pp. 1757-1772 ◽  
Author(s):  
Zhan-Song Wang ◽  
Ling Tian ◽  
Yuan-Hao Wu ◽  
Bei-Bei Liu
Keyword(s):  
Knowledge Acquisition ◽  
Conceptual Design ◽  
Current Knowledge ◽  
Target Function ◽  
Design Knowledge ◽  
Prototype System ◽  
Sorting Algorithm ◽  
Illustrative Case ◽  
User Interest ◽  
Design Intent

Existing knowledge provides important reference for designers in mechanical design activities. However, current knowledge acquisition methods based on information retrieval have the problem of inefficiency and low precision, which mainly meet the requirement for knowledge coverage. To improve the efficiency of knowledge acquisition and ensure the availability of design knowledge, this paper proposes a knowledge push service method based on design intent and user interest. First, the design intent model, which is mainly the formal expression of the target function of conceptual design, is built. Second, the user interest model that consists of domain themes and operation logs is built, and an automatic updating method of user interest is proposed. Third, a matching method of design knowledge based on design intent, and a sorting algorithm of knowledge candidates based on user interest are proposed to realize personalized knowledge active push service. Finally, a prototype system called Personalized Knowledge Push System for Mechanical Conceptual Design (MCD-PKPS) is implemented. An illustrative case demonstrates that the proposed method can successfully improve the efficiency and availability of knowledge acquisition.

A Data-Driven Text Mining and Semantic Network Analysis for Design Information Retrieval

2017 ◽  
Vol 139 (11) ◽  
Author(s):  
Feng Shi ◽  
Liuqing Chen ◽  
Ji Han ◽  
Peter Childs
Keyword(s):  
Information Retrieval ◽  
Network Analysis ◽  
Text Mining ◽  
Engineering Design ◽  
Large Scale ◽  
Semantic Network ◽  
Document Retrieval ◽  
Design Information ◽  
Improve Design ◽  
Correlation Degree

With the advent of the big-data era, massive information stored in electronic and digital forms on the internet become valuable resources for knowledge discovery in engineering design. Traditional document retrieval method based on document indexing focuses on retrieving individual documents related to the query, but is incapable of discovering the various associations between individual knowledge concepts. Ontology-based technologies, which can extract the inherent relationships between concepts by using advanced text mining tools, can be applied to improve design information retrieval in the large-scale unstructured textual data environment. However, few of the public available ontology database stands on a design and engineering perspective to establish the relations between knowledge concepts. This paper develops a “WordNet” focusing on design and engineering associations by integrating the text mining approaches to construct an unsupervised learning ontology network. Subsequent probability and velocity network analysis are applied with different statistical behaviors to evaluate the correlation degree between concepts for design information retrieval. The validation results show that the probability and velocity analysis on our constructed ontology network can help recognize the high related complex design and engineering associations between elements. Finally, an engineering design case study demonstrates the use of our constructed semantic network in real-world project for design relations retrieval.

A Novel Application of Gamification for Collecting High-Level Design Information

2015 ◽  
Author(s):  
Hyunmin Cheong ◽  
Wei Li ◽  
Francesco Iorio
Keyword(s):  
User Study ◽  
Design Knowledge ◽  
Cad Systems ◽  
Design Information ◽  
Knowledge Based ◽  
Game Mechanics ◽  
Abstract Level ◽  
Level Problem ◽  
Level Design ◽  
High Level

This paper presents a novel application of gamification for collecting high-level design descriptions of objects. High-level design descriptions entail not only superficial characteristics of an object, but also function, behavior, and requirement information of the object. Such information is difficult to obtain with traditional data mining techniques. For acquisition of high-level design information, we investigated a multiplayer game, “Who is the Pretender?” in an offline context. Through a user study, we demonstrate that the game offers a more fun, enjoyable, and engaging experience for providing descriptions of objects than simply asking people to list them. We also show that the game elicits more high-level, problem-oriented requirement descriptions and less low-level, solution-oriented structure descriptions due to the unique game mechanics that encourage players to describe objects at an abstract level. Finally, we present how crowdsourcing can be used to generate game content that facilitates the gameplay. Our work contributes towards acquiring high-level design knowledge that is essential for developing knowledge-based CAD systems.

CAD Model Reuse Based on the Integrate Design History

2013 ◽  
Vol 423-426 ◽  
pp. 1898-1901
Author(s):  
Ying Jie Wu ◽  
Qi Gao ◽  
Gang Liu ◽  
Xue Ji
Keyword(s):  
Product Design ◽  
Prototype System ◽  
Cad Model ◽  
Design History ◽  
Model Reuse ◽  
Design Information ◽  
Modeling Process ◽  
Design Guide ◽  
Incomplete Design ◽  
Integrate Design

A CAD model cannot be reused efficiently because of its incomplete design information. To solve this problem, a CAD model reuse method based on the IDH (Integrate Design History) is presented. IDH is defined as full record of modeling process and related knowledge, an extended CAD model is built as the carrier of the IDH. Based on the extended CAD model, a model reuse method is proposed by taking advantage of product design guide technology. Finally, a prototype system is developed and verifies the efficiency and feasibility of this method.

SolidWorks Secondary Development System of DTH Bits

2013 ◽  
Vol 753-755 ◽  
pp. 1065-1068
Author(s):  
Chang Ping Li ◽  
Jian Hua Rao ◽  
Jun Lin Hu
Keyword(s):  
Secondary Development ◽  
Practical Application ◽  
Design Efficiency ◽  
Engineering Construction ◽  
Development System ◽  
Design Information ◽  
Improve Design ◽  
Management Efficiency ◽  
Key Features

DTH (Down-the-hole) Bits are widely used in engineering construction and mining but the design level of DTH Bits needs improving. The kinds of DTH Bits are various in the practical application. Meanwhile, design efficiency is low and management in design information of historical product is insufficient. To solve the problems, key features of the DTH Bits used in different strata are analyzed and SolidWorks secondary development system of DTH Bits is developed with VB.NET. The secondary development system runs in the same process with SolidWorks in the form of a plug-in. ADO technique is used to connect the system and database which stores design information of historical product. It proves that the secondary development system can improve design and management efficiency of DTH Bits.

Information generation during design: Information importance and design effort

2005 ◽  
Vol 19 (1) ◽  
pp. 19-32 ◽  
Author(s):  
A.J. DENTSORAS
Keyword(s):  
Theoretical Analysis ◽  
Design Process ◽  
Quantitative Relationship ◽  
Design Knowledge ◽  
Belt Conveyor ◽  
Early Design ◽  
Design Information ◽  
Early Design Stages ◽  
Information Generation ◽  
The Relationship

The present paper studies the process of information generation during design and focuses on the relationship between the information importance and the required effort for its generation. Multiple associative relationships among design entities (handled as design descriptors) are used to represent the design knowledge. The characteristics of the dependent and the primary descriptors are examined and their distinct roles in the design process are discussed. Term definitions concerning the information importance and the design effort are also introduced. The descriptors are used to form a matrix. A number of operations on this matrix results in its transformation, with the final matrix reflecting the quantitative relationship between the information importance and the design effort. From the aforementioned matrix, a unique sorted list for the primary design descriptors is produced. Following this list during descriptor instantiation ensures the production of design information of maximum importance with the least effort in the early design stages. The design of a belt conveyor is used as a basis for a better understanding of the theoretical analysis and for a demonstration of the use of the suggested descriptor list.

scholarly journals Educational Rationale Metadata for Learning Objects

2002 ◽  
Vol 28 (3) ◽  
Author(s):  
Tom Carey ◽  
Jonathan Swallow ◽  
William Oldfield
Keyword(s):  
Instructional Quality ◽  
Learning Objects ◽  
Instructional Approaches ◽  
Design Decisions ◽  
Design Intent ◽  
Post Secondary ◽  
Critical Elements ◽  
K 12 ◽  
The Impact

Instructors searching for learning objects in online repositories will be guided in their choices by the content of the object, the characteristics of the learners addressed, and the learning process embodied in the object. We report here on a feasibility study for metadata to record process-oriented information about instructional approaches for learning objects, though a set of Educational Rationale [ER] tags which would allow authors to describe the critical elements in their design intent. The prototype ER tags describe activities which have been demonstrated to be of value in learning, and authors select the activities whose support was critical in their design decisions. The prototype ER tag set consists descriptors of the instructional approach used in the design, plus optional sub-elements for Comments, Importance and Features which implement the design intent. The tag set was tested by creators of four learning object modules, three intended for post-secondary learners and one for K-12 students and their families. In each case the creators reported that the ER tag set allowed them to express succinctly the key instructional approaches embedded in their designs. These results confirmed the overall feasibility of the ER tag approach as a means of capturing design intent from creators of learning objects. Much work remains to be done before a usable ER tag set could be specified, including evaluating the impact of ER tags during design to improve instructional quality of learning objects.

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