Methodology and Tools to Support Knowledge Management in Topology Optimization

2010 ◽  
Vol 10 (4) ◽  
Author(s):  
Maurizio Muzzupappa ◽  
Loris Barbieri ◽  
Fabio Bruno ◽  
Umberto Cugini
Keyword(s):  
Design Automation ◽  
Computer Aided Design ◽  
Development Process ◽  
The Other ◽  
Topological Optimization ◽  
Product Development Process ◽  
Innovative Methodology ◽  
Original Procedure ◽  
Aided Design ◽  
Automation Tools

Topological optimization (TO) tools are today widely employed in several engineering fields (e.g., construction, aeronautics, aerospace, and automotive). The diffusion of these tools is due to their capacity to improve mechanical properties of products through a global optimization of the product in terms of weight, stiffness, strength, and cost. On the other hand, the adoption of TO tools still requires a sizeable organizational effort because, at present, these tools are mostly stand-alone and are not well integrated into the product development process (PDP). This paper presents an innovative methodology that supports designers and analysts in formalizing and transmitting design choices taken during project activities and in making the integration of TO tools in the PDP more efficient. The methodology clearly defines the roles, the activities, the data to exchange, and the software tools to be used in the process. Some custom computer-aided design automation tools have been implemented to improve the efficiency of the methodology. Moreover, this paper defines an original procedure to support the interpretation of the TO results.

A Machine Learning Framework for Decision Support in Design and Manufacturing

2021 ◽  
pp. 479-498
Author(s):  
Aditya Balu ◽  
Sambit Ghadai ◽  
Gavin Young ◽  
Soumik Sarkar ◽  
Adarsh Krishnamurthy
Keyword(s):  
Product Development ◽  
Computer Aided Design ◽  
Iterative Process ◽  
Development Process ◽  
Product Development Process ◽  
Design Environment ◽  
Learning Framework ◽  
Design And Manufacturing ◽  
Product Design Process ◽  
Aided Design

The widespread adoption of computer-aided design (CAD) and manufacturing (CAM) tools has resulted in the acceleration of the product development process, reducing the time taken to design a product [46]. However, the product development process, for the most part, is still decentralized with the design and manufacturing reviews being performed independently, leading to differences between as-designed and as-manufactured component. A successful product needs to meet its specifications, while also being manufacturable. In general, the design engineer ensures that the product is able to function according to the specified requirements, while the manufacturing engineer gives feedback to the design engineer about its manufacturability. This iterative process is often time consuming, leading to longer product development times and higher costs. Recent researches in integrating design and manufacturing [24, 28, 46] have tried to reduce these differences and making the product development process easier and accessible to designers, who may not be manufacturing experts. In addition, there have been different efforts to enable a collaborative product development process and reduce the number of design iterations [8, 10, 41]. However, with the increase in complexity of designs, integrating the manufacturability analysis within the design environment provides an ideal solution to improve the product design process.

Design Automation Tools as a Support for Knowledge Management in Topology Optimization

2008 ◽  
Author(s):  
Loris Barbieri ◽  
Fabio Bruno ◽  
Maurizio Muzzupappa ◽  
Umberto Cugini
Keyword(s):  
Knowledge Management ◽  
Product Development ◽  
Data Exchange ◽  
Development Process ◽  
Feature Recognition ◽  
Topological Optimization ◽  
Product Development Process ◽  
Automatic Feature Recognition ◽  
Efficient Data ◽  
Automation Tools

The problem of integrating topological optimization tools in product development process (PDP) is becoming more and more urgent since nowadays they are widely employed in several engineering fields (civil, aeronautics, aerospace, automotive). The interest for these tools is due to their capacity to better mechanical properties through a global optimization of the product in terms of weight, stiffness, resistance and cost. In particular, there is a lack of specific tools for automatic feature recognition on voxel models generated by the topological optimization tools. Our paper presents an innovative methodology that allows the integration of topological optimizers in the product development process by means of a wise and rational knowledge management and an efficient data exchange between different systems. The target has been reached through the implementation of CAD automation modules which decrease the working time and give the possibility to effectively schematize the designer’s knowledge.

scholarly journals Automatic Identification Of Wrist Position In A Virtual Environment For Garment Design

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yu Chen ◽  
Qinhua Hou ◽  
Yan Hong ◽  
Weihong Gao
Keyword(s):  
Computer Aided Design ◽  
Development Process ◽  
Search Algorithm ◽  
Styloid Process ◽  
Product Development Process ◽  
Automatic Identification ◽  
Clothing Design ◽  
Wrist Position ◽  
Garment Design ◽  
Aided Design

Abstract With the development of virtual reality, computer-aided design has shown its strength in the garment product development process. Wrist position corresponds to the styloid process of the ulna (SPU). Due the problem that the SPU position is usually not the finest position of the forearm, the wrist position identification in the 3D clothing design is quite important. This paper proposes a method that uses a fixed-step search algorithm based on existing proportion methods to determine the position of the SPU. The accuracy and efficiency of the proposed method has been validated using 100 samples by comparison with the existing methods. It can be fully applied to a virtual 3D-to-2D garment prototyping process and ensure the automation of this process.

Tetrahedral Mesh-Based Embodiment Design

2010 ◽  
Author(s):  
Sebastian Pena Serna ◽  
Andre Stork ◽  
Dieter W. Fellner
Keyword(s):  
Computer Aided Design ◽  
Development Process ◽  
Product Development Process ◽  
Tetrahedral Mesh ◽  
Semantic Features ◽  
Cad System ◽  
Embodiment Design ◽  
Computer Aided ◽  
High Level ◽  
Aided Design

The engineering design is a systematic approach implemented in the product development process, which is composed of several phases and supported by different tools. Computer-Aided Design (CAD) and Computer-Aided Engineering (CAE) tools are particularly dedicated to the embodiment phase and these enable engineers to design and analyze a potential solution. Nonetheless, the lack of integration between CAD and CAE restricts the exploration of design variations. Hence, we aim at incorporating functionalities of a CAD system within a CAE environment, by means of building a high level representation of the mesh and allowing the engineer to handle and manipulate semantic features, avoiding the direct manipulation of single elements. Thus, the engineer will be able to perform extruding, rounding or dragging operations regardless of geometrical and topological limitations. We present in this paper, the intelligence that a simulating mesh needs to support, in order to enable such operations.

Using Site-Based Techniques to Evolve the Product Development Process in Manufacturing Industries

1998 ◽  
Vol 42 (13) ◽  
pp. 994-998
Author(s):  
Eric N. Wiebe
Keyword(s):  
Computer Aided Design ◽  
Development Process ◽  
Three Dimensional ◽  
Product Data Management ◽  
Manufacturing Industries ◽  
Product Development Process ◽  
Furniture Industry ◽  
Manufacturing Operations ◽  
Depth Analysis ◽  
Aided Design

Many manufacturing industries, especially small to medium-sized companies, are in the process of exploring the move from two-dimensional computer-aided design (CAD) technologies to three-dimensional CAD tools interfaced with product data management (PDM) systems. For many companies, their current organizational structure is not well suited to fully leverage the capabilities of new CAD/PDM technology. This paper explores the author's experiences working in the residential furniture industry, helping companies successfully integrate CAD/PDM systems into their engineering and manufacturing operations. Of particular focus was the role user-centered, site-based techniques played in helping one company with this integration process. Both current and future scenarios based on an in-depth analysis of the product developed process were generated and used to help guide an implementation plan for a new CAD/PDM system.

An Object-Oriented Approach to the Engineering Design Process

1995 ◽  
Author(s):  
Tapio Korpela ◽  
Ari Heikkinen ◽  
Tatu Leinonen
Keyword(s):  
Computer Aided Design ◽  
Development Process ◽  
Object Oriented ◽  
Machine Design ◽  
Customer Requirements ◽  
Engineering Design Process ◽  
Object Oriented Approach ◽  
Aided Design ◽  
The University ◽  
Oriented Approach

Abstract Laboratory of Machine Design at the University of Oulu has modelled the production information for a gear transmission unit in co-operation with a Finnish gear manufacturer, Santasalo Ltd. The basic idea was to integrate computer aided design into modern FMS-based production activities. The main goal in this project is to capture the whole gear box development process from customer requirements to manufacturable assembly and detail information in OOA models.

Space claim analysis for addressing maintenance of key components in complex products

2017 ◽  
Vol 37 (1) ◽  
pp. 71-83 ◽  
Author(s):  
Andre Diogo Moscheto ◽  
Carlos Cziulik ◽  
Simão Marcon Junior ◽  
Marcos Sulevis
Keyword(s):  
Product Development ◽  
Computer Aided Design ◽  
Theory And Practice ◽  
Product Development Process ◽  
Design Development ◽  
Content Type ◽  
Cad Systems ◽  
New Information ◽  
Aided Design ◽  
Maintenance Personnel

Purpose The purpose of this paper is to provide a new approach involving guidelines and supporting techniques that guarantees all needed space for appropriate product maintenance. Design/methodology/approach The approach is based on two major areas: field survey to understand how maintainability parameter is applied and converge theory and practice into a systematic space claim method using computer-aided design (CAD) systems to assure proper maintenance procedures at design stages. Findings Case studies from a truck industry conducted following the proposed approach contrast the savings that can be achieved by using a proper space claim for aftermarket needs against an unsuitable level of participation by maintenance personnel during the design development. Research limitations/implications This approach is highly dependent on maintenance experts with suitable skills on CAD systems. Practical implications Products developed according to the approach envisaged can result in following aspects: lower repair time, better maintenance procedures on key components, easier preventive maintenance, less need for special tools, more ergonomic design, better communication between design and service engineers, simplicity and less complex training. Social implications Further research on maintainability will provide new information on how to apply this parameter on product development process (PDP), so design teams can better understand and address this relevant issue. The proposed method has been introduced in the PDP of a major multinational automotive company. Originality/value A new process is presented, considering the protection of needed spaces for maintenance procedures throughout the PDP, diverging to other studies that only propose analysis addressing maintainability at singular point in time during the product development. In just one case study presented, savings of US$1.3m were achieved by applying this space claim approach.

The Downstream Digital Mock-Up: A New Concept to Support Virtual Reality Applications in the Aeronautic Industry

2004 ◽  
Author(s):  
G. Drieux ◽  
J.-C. Le´on ◽  
N. Chevassus ◽  
F. Guillaume
Keyword(s):  
Virtual Reality ◽  
Product Development ◽  
Concurrent Engineering ◽  
Development Process ◽  
Numerical Models ◽  
The Other ◽  
Product Development Process ◽  
Design Decision ◽  
Engineering Organizations ◽  
Development Phases

The Digital Mock-Up (DMU), which is a comprehensive numerical model describing the final manufactured product, is today widely used in the industry (like the automotive and aeronautic industries) to support the concurrent engineering organizations and processes. On the other hand, simulation helps in the development of a product for design decision making or validation purposes. It allows to determine, with the appropriate level of accuracy, the behavior of the future product under a specific environment or set of exterior actions. Virtual Reality (VR) applications are simulations where the focus is on immersion and interaction with the product. However, there is still lacks in the integration of simulation within the product development phases. In particular the link between the DMU and the numerical models for simulation in the large is often hardly achieved. For some types of simulation, it is even inexistent. In this paper, we propose a new object, the Downstream Digital Mock-Up (DDMU), based on a polyhedral representation, and we show that it can be a support for the integration of a subset of simulation activities within the product development process by making the link between the DMU and these simulations. In the particular case of VR, we show that this object is particularly adapted. One particularity of the DDMU is to be prepared for a specific target application, defined by its objectives and the context in which it is immersed.

A Developed Structure for DC–DC Quasi-Z-Source Converter with High Voltage Gain and High Reliability

2018 ◽  
Vol 28 (01) ◽  
pp. 1950012 ◽  
Author(s):  
Ebrahim Babaei ◽  
Mohammad Shadnam Zarbil ◽  
Elias Shokati Asl
Keyword(s):  
Computer Aided Design ◽  
High Reliability ◽  
Stage Structure ◽  
The Other ◽  
Voltage Gain ◽  
Operating Modes ◽  
High Voltage Gain ◽  
Comprehensive Comparison ◽  
Simulation Results ◽  
Aided Design

In this paper, a developed structure for DC–DC quasi-Z-source (QZS) converters is proposed. First, the proposed two-stage structure is presented and analyzed. Then, the proposed structure is extended to [Formula: see text] stages and its relations are calculated. Compared with other conventional structures, the proposed structure has higher voltage gain and higher reliability. The proposed topology is suitable for high power applications. To have the correct performance of conventional QZS converter, all impedance network elements must be intact. In the case of small failure in one of the elements, the operation of the whole system is disrupted. The proposed structure has high reliability because when one stage fails, the fault management system separates that stage from the other stages and the remaining stages continue to transmit power. In this paper, in addition to analyzing the operation of the proposed converter in different operating modes, calculations of voltage gain, voltage stresses across capacitors and reliability analysis are also presented. Reliability is calculated according to well-known Markov model. Moreover, a comprehensive comparison in terms of voltage gain and reliability is made between the proposed converter and the other conventional structures. Also, the rating values of inductors and capacitors are designed. Finally, experimental and simulation results are presented by using power system computer-aided design (PSCAD) software to verify the theories.

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