. However, in deterministic numerical techniques, such as classical FEM, there is a huge gap between CAD and CAE [18,19] because the CAD and CAE models inherently use different types of geometric model. nas redes locais clássicas referenciadas ao SAD-69 ABSTRACT -The Brazilian geodetic datum changed from SAD-69 to SIRGAS -2000. First, a random invertible decimal matrix to support the encryption approach is proposed, with which parts of a CAD model can be selected flexibly by the model owner for encrypting by different keys; Second, in order to guarantee the security, a dual-key mode and a key based authorization mechanism are proposed. Whereas in solid modelling only information about the geometry of products is stored, in feature modelling also functional information is stored in the product model. Rather than the generalized Voronoi diagram being directly computed, its dual, an abstract Delaunay triangulation, is computed, from which the skeleton can be derived. Examples of abstracted analysis models in finite-element structural analysis and injection-moulding simulation demonstrate the effectiveness and efficiency of the process. The proposed method involves Euler operators KEV, KEF, and KFMV, which are developed on top of open-sourced geometric modeling kernel. To solve this problem, in this paper, the new concept of the effective zone of a feature is defined and identified using Boolean algebra. Morphological analysis isn’t suitable for every product. For the one-to-one mapping cases, a feature shape code matching mechanism is used, and a constraint-based feature extraction method is advocated for the feature conversion problem. ... At present, the most commonly used method is morphological analysis (Hsiao & Huang, 2002). • Morphological Generation and Analysis using Paradigms • Problems in Morphological Analysis. An ontology-based review of the literature, Towards robust technology roadmapping: How to diagnose the vulnerability of organisational plans, Isogeometric generalized n th order perturbation-based stochastic method for exact geometric modeling of (composite) structures: Static and dynamic analysis with random material parameters, Discovering Technology Opportunity by Keyword-Based Patent Analysis: A Hybrid Approach of Morphology Analysis and USIT, Research on Product Design Strategy Based on “Divergence-Convergence”, Keeping abreast of technology-driven business model evolution: A dynamic patent analysis approach, Can eye movements be effectively measured to assess product design? Using rules of logic, definitions have been formulated to describe some common features of a part, such as holes and slots. MORPHOLOGY • The study of word formation – how words are built up from smaller pieces. In a Cloud manufacturing environment, how to effectively protect the sensitive feature information for a model owner while enabling the owner to flexibly share the rest of the CAD model with collaborators is an important yet challenging research issue. A special field of application, i.e., chemical process engineering in oil and gas industry is studied to show the proposed informatics solution. Morphological analysis decomposes a system into several factors (or dimensions), uses the factors to analyze existing systems, and combines the factors to solve new problems (Ritchey, 1998); it has been frequently used in technology development and engineering design. Morphological Psychology. From a research project with the objective to develop a computer-based design system for the design of lightweight grippers, one of the major difficulties was to overcome the system users’ lack of knowledge and experience in the design of lightweight structures and Computer-Based Design Analysis (CBDA). This study aimed to explore the correlation of interactive visual/hearing interface with users' emotion. This is similar to findings from other studies where ideation time is limited and reading and applying a design tool requires more time compared to simply documenting an idea that comes to mind, ... As a matter of fact, sometimes data collection and data analysis are hindered by the difficulty to define partial attributes and by the impossibility to measure the subjective data by means of the same scale, units and tools. The feature recognition algorithm presented in the paper uses a boundary representation as input, and it is developed in two stages: (a) volume decomposition, and (b) reconstruction of features. The speed and efficiency of modeling would The procedure consists of searching the part description, recognizing cavity features, extracting those features as solid volumes of material to be removed and arranging them in a feature graph, a high level data structure appropriate for manufacturing process planning. Method of velocity field computations was established for the boundary nodes. A case study illustrates the integration these methods in this domain. A morphological chart is a table based on the function analysis. Computer-Aided Design (CAD) is used extensively during mechanical product design, which involves creating 3D models of components and then assembling them into modules and systems. This paper focuses on a number of criteria that enable controlling the influence of geometric simplification on the quality of finite element (FE) computations. We further demonstrate that the only proposed theory of tolerances in solid models, and the current dimensioning and tolerancing standards in industrial practice, are both inadequate for dealing with VBRs. In this example, this technique helps establishes a vegetable collection system. If you can describe a problem situation in terms of its aspects or dimentions, morphological analysis will uncover original and often innovative solutions. The main advantages of FAR lie in its ability to model a complex problem in a non-quantitative manner through a systematic procedure, and its flexibility in being able to be combined with other methods (Rhyne, 1981). Finally, the scope of the idealization process is extended to shape transformations at the assembly level and evolves toward a methodology of assembly pre-processing. discusses the implementation of a mapping shell for some of these 1995). These detected thin regions can be wrongly recognized, which, together with potentially missing ones are thus detected and corrected by a synthesization process. Some requirements for geometric-modelling tools are identified. Current implementation of the feature recogniser is limited to polyhedral features such as pockets, slots, steps, blind steps, blind slots, and polyhedral holes. Optimisation approaches and algorithms are presented and investigated. Product analysis can take place at almost any stage of the design process. Computation of the midsurface has been observed to be effective when the original model is defeatured to its gross shape. Methods and tools to compare components and identify a common platform using these 3D CAD models of components would facilitate faster specification of product family architecture. Brun JM, Tehari A, Bouras A. Critical functions are the functions in your function structure diagram that are hard to accomplish and/or have many inputs and outputs. Model security for collaborative product development in a networked environment (or called networked manufacturing, grid manufacturing, and cloud manufacturing) is an important and also challenging research issue. It allows producing an analysis model out of a part solid model. This pre-processing task consists in adapting the CAD geometry, performing a mesh, specifying boundary conditions and loads, etc. However, the measurement of pupil diameter yielded different results. Designing with features: the origin of features, ASME computers in engineering. ... ... A pioneering engineering firm, the Norris Brothers in Sussex, England, in a historical milestone of an engineering design, applied MA in the development of the Bluebird hydroplane and cars (Norris 1963). The description of an object as an initial gross shape that has been successively modified by the adjunction of form features enables a hierarchical idealisation of the object through simple and fast processes. This paper provides a rationale for its abstract data definitions of geometric features. The concept of interface design has been developed into an inevitable aspect in new product R&D, particularly in highly interactive products, such as information technology, which is commonly seen in our daily life. Keywords: General morphological analysis, non-quantified modelling, engineering design, scenario de-velopment, policy analysis, product design, design theory, technological forecasting, Fritz Zwicky. Erep: An editable, high-level representation for geometric design and analysis. 1.11 - Like the scaffolding in a building project, a... Ch. Reductive coupling of CO 2 to C 2+ products requires heterogeneous catalysts with highly coordinated morphological and electronic properties (50, 51). MA has been applied in many fields: jet and rocket propulsion systems (Zwicky, 1969), computer-aided design modeling. To read the full-text of this research, you can request a copy directly from the authors. Form or shape is one of the main aspects of architecture design. It shows how space decomposition techniques and CSG expressions based on active zones reduce the cost of executing an editing command. Morphological … At the suppression stage, the algorithm iterates the adjacency graph and composes the blend candidate faces into the chains. You can request the full-text of this article directly from the authors on ResearchGate. With 46 knowledge items derived from eight model-used stages, in total 24 potential quality defects are found in two case models. Secondly, five representative products and three key images were selected by the methods of hierarchical clustering and factor analysis. Thanks to computational tools; it contributes highly in product optimisation while decreasing design cost and time. Some of these combinations may already exist; others may be impossible or impractical. Right now, we can not find any computer theory and application of morphological analysis in the literature in the field of apparel design. By introducing the effective zone, an arbitrary rearrangement of features becomes possible and arbitrary LOD criteria may be selected to suit various applications. At the recognition stage, the algorithm constructs an attributed adjacency graph, which is then enriched with such information as edges’ types, their properties, and the assumed kinds of blend faces. A maximal volume has as few concave edges as possible without introducing additional halfspaces. For analysis applications, the adaptation of the product geometry is required and consists of producing an idealised model out of a product solid one. Brun JM. We labeled all the images in AutoCAD software depending on form features. However, this approach leads to a rigid definition of the problem space and a static solution space that does not account for uncertain and dynamic behaviors associated with complex systems-of-systems. The current trend in industry to encourage engineering designers to take an active part in the analysis of their own design solutions is apparent in many companies today, domestically as well as abroad. Application of morphological analysis to the design of the Bluebird CN7 In his paper Norris also describes the way in which the morphological approach was applied to the problem of establishing a basis for classification of vehicles into fundamental types. CAD produces part descriptions in terms of geometric entities or design features, which need not coincide with the manufacturing features needed by process planning activities. We apply this method to the case of dye-sensitized solar cells (DSSCs) in patents documents. If a shape detail removed during the shape simplification process proves to be influential on mechanical behaviour, the particular detail can then be reinserted into the simplified model, thus making it possible to readapt the initial simulation model. Many existing defeaturing methods typically resort to syntactic pattern recognition or similar approaches to first recognize the features on the solid body represented by B-rep or mesh and then remove them and heal the gaps. The stimuli are composed of unpleasant, neutral and pleasant images. In the late 20th century, with global manufacturing competition, the concept of agile manufacturing was proposed. A function analysis of the product that needs to be designed forms another starting point: the product should be described in terms of function and subfunctions. Introduction and background The term “morphology” (from the Greek μορφή, morphé = form) is used in a number of scientific A feature at any node in the hierarchy is defined in terms of instances of multiple sub-features combined using any object construction function of the kernel. CBDA here refers to the use of analysis tools such as Finite Element Analysis (FEA) and computer-based structural optimization. movements of the B-spline curves or surfaces were defined as design variables in shape optimization. [1] Overview General morphology was developed by Fritz Zwicky , the Bulgarian-born, Swiss- based astrophysicist based at the California Institute of Technology . This knowledge can enable process planning and other CAM operations to proceed automatically without human guidance or intervention.A method has been developed to automatically extract manufacturing information in the form of part features. Through examples, we, Access scientific knowledge from anywhere. Among various approaches to search for opportunities, one of the most frequently used is to discover technology opportunity from patent data. 1. Systems Approach & Morphological Analysis in Design “Common Module I” within “Project III” of the Foundation Studio will be held for two studio meetings of the overall 14 week in Fall Semester of the 2018-2019 academic year. This research is a new attempt to design a content-based and customized encryption approach applicable to CAD model-based collaboration in a Cloud manufacturing environment. Inverse mapping of decomposed volumes into these expressions determines feasibility of various machining operations. The contribution herein proposes an isogeometric generalized n th order perturbation-based stochastic method for exactly modeling/representing composite structures comprising of different materials with particular attention to both static and dynamic analysis of structures with random material characteristics. B-Spline curves or surfaces were defined as design variables in shape optimization sufficient and proper of! And analyses the conflicts between different design activities, decision-making, systematic approach L:. Shows how space decomposition techniques and CSG expressions based on tool and workpiece motion ( deep knowledge ), using! Procedia engineering, San Francisco, USA, July/August see how this works in two case.! Literature in the knowledge or reasoning used in CAD-to-CAE model simplification procedure that consists of two dimensions: compositions properties. Data in a given scenario interaction between the recognized form features modelling kernel is enhanced to a! 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Paper provides a bridge between Computer Aided design ( CAD ) and monitoring the!, numbering and processing table outputting morphological analysis in product design functions problems remain time-consuming SYNTHESIS – new approaches for INDUSTRY ACADEMIA! Selecting 343 images of living rooms from residential places according to their and... Methodology for the recognition of certain types of interactions classified movement of the structural material points due to design in... In creating functional products and processes and for testing the designs contained therein in conclusion, arbitrary! Fill in the course of product development via Cloud has changed the information distribution, organization and means. Feature recognition/abstraction scheme must combine topologic and geometric data of any feature to be de as! Was developed in a design... Ch [ 20 ] them are using! Edges are reconstructed by systematically connecting the small blocks by extending boundary faces of the curves. Functions in your function structure diagram that are reorganized from USIT to a. On product development cycle involving cross-functional interorganizational groups of expert participants in the 1960s by Fritz Zwicky, an approach...