Rule-based generation of exploded-views and assembly sequences

1989 ◽  
Vol 3 (3) ◽  
pp. 143-155 ◽  
Author(s):  
Ehud Kroll ◽  
Ehud Lenz ◽  
John R. Wolberg
Keyword(s):  
Computer Aided Design ◽  
Automatic Generation ◽  
Design System ◽  
Assembly Planning ◽  
New Approach ◽  
Knowledge Based ◽  
Expert User ◽  
Assembly Sequences ◽  
Two Phases ◽  
Aided Design

AbstractDirect planning of assembly sequences is either very complicated computationally, or requires an ‘expert’ user. This paper presents a new approach to the automatic generation of assembly plans which involves two phases. An ‘exploded’ layout of the assembled product is first found from its topological and geometric description by a graph-based procedure. Then, a knowledge-based technique is used for planning of selected assembly sequences by utilizing theoretical as well as heuristic knowledge of mechanical components and assembly processes. Besides serving the assembly planning phase, automatic generation of exploded-views could also be a most desirable feature of any computer-aided design system. An example demonstrates the application of the method to an actual product.

Structural Analysis of Product and Computer-Aided Assembly Planning in AssemBL Software Package

2018 ◽  
pp. 11-33
Author(s):  
A. N. Bozhko
Keyword(s):  
Computer Aided Design ◽  
State Of The Art ◽  
Graph Model ◽  
Design System ◽  
Assembly Planning ◽  
Complex Products ◽  
Assembly Sequences ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

Computer-aided design of assembly processes (Computer aided assembly planning, CAAP) of complex products is an important and urgent problem of state-of-the-art information technologies. Intensive research on CAAP has been underway since the 1980s. Meanwhile, specialized design systems were created to provide synthesis of assembly plans and product decompositions into assembly units. Such systems as ASPE, RAPID, XAP / 1, FLAPS, Archimedes, PRELEIDES, HAP, etc. can be given, as an example. These experimental developments did not get widespread use in industry, since they are based on the models of products with limited adequacy and require an expert’s active involvement in preparing initial information. The design tools for the state-of-the-art full-featured CAD/CAM systems (Siemens NX, Dassault CATIA and PTC Creo Elements / Pro), which are designed to provide CAAP, mainly take into account the geometric constraints that the design imposes on design solutions. These systems often synthesize technologically incorrect assembly sequences in which known technological heuristics are violated, for example orderliness in accuracy, consistency with the system of dimension chains, etc.An AssemBL software application package has been developed for a structured analysis of products and a synthesis of assembly plans and decompositions. The AssemBL uses a hyper-graph model of a product that correctly describes coherent and sequential assembly operations and processes. In terms of the hyper-graph model, an assembly operation is described as shrinkage of edge, an assembly plan is a sequence of shrinkages that converts a hyper-graph into the point, and a decomposition of product into assembly units is a hyper-graph partition into sub-graphs.The AssemBL solves the problem of minimizing the number of direct checks for geometric solvability when assembling complex products. This task is posed as a plus-sum two-person game of bicoloured brushing of an ordered set. In the paradigm of this model, the brushing operation is to check a certain structured fragment for solvability by collision detection methods. A rational brushing strategy minimizes the number of such checks.The package is integrated into the Siemens NX 10.0 computer-aided design system. This solution allowed us to combine specialized AssemBL tools with a developed toolkit of one of the most powerful and popular integrated CAD/CAM /CAE systems.

Computer Aided Design of Transmission Components of Liquid Stirred Tank

2011 ◽  
Vol 109 ◽  
pp. 711-714
Author(s):  
Ying Jiang ◽  
Jie Liu
Keyword(s):  
Computer Aided Design ◽  
Automatic Generation ◽  
Structure Design ◽  
Stirred Tank ◽  
Design System ◽  
Design Requirement ◽  
Design Efficiency ◽  
The Common ◽  
Aided Design ◽  
Develop System

Secondary develop system can realize design automation of the common parts, so that software system can automatically inquire the chart and get data, then this could really release design personnel and improve the design efficiency. By secondary develop system of stirred tank users can respectively carry on the design according to their own needs. So secondary develop system has the function of automatic generation graphics, and can generate CAD drawings complying with the design requirement, so it reflected the intelligent performance of the design system. Secondary develop system is able to complete the automatic design of common parts, and can greatly improve the quality and efficiency of design, so it has very important use value. This design realizes the function of automatic graphics generation of transmission of stirred tank, and can generate structure design of common belt wheel.

Design of Mine Ventilation Systems Based on Artificial Intelligence

2014 ◽  
Vol 614 ◽  
pp. 107-112
Author(s):  
Xiao Yu Yin ◽  
Xian Ping Xie ◽  
Zhen Li ◽  
Jian Gong Li ◽  
Ting Jun Wang ◽  
...  
Keyword(s):  
Expert System ◽  
Computer Aided Design ◽  
Design Method ◽  
Mine Ventilation ◽  
Design System ◽  
Knowledge Based ◽  
Aided Design ◽  
And Control ◽  
Intelligent Computer ◽  
Ventilation Systems

Expert systems, or knowledge based systems, are programs in which the answer to a user-posed question is reached by logical or plausible inference rather than strictly by calculation, although calculation routines can form a major part of an expert system. Based on the integration of expert system technology and optimization technology, an intelligent computer aided design method for mine ventilation systems is proposed in this paper. Firstly, the structure and control algorithm of the intelligent design system are explored. Secondly, the knowledge types required for the mine ventilation expert system and the acquiring method of knowledge are discussed. Finally, the inference method of this expert system is put forward.

Design and Implementation of an Intelligent CAD System

1987 ◽  
Author(s):  
M. J. Jakiela ◽  
P. Y. Papalambros
Keyword(s):  
Computer Aided Design ◽  
Design System ◽  
Knowledge Based Systems ◽  
Production Rules ◽  
Automated Assembly ◽  
Cad System ◽  
Design And Implementation ◽  
Knowledge Based ◽  
System Requirements ◽  
Aided Design

Abstract System requirements and system design for integrating a production rule program and a computer aided design system are presented. An implementation using a commercially available graphics modeling system is described. A “suggestive mode” interface is programmed as an example with application to design for automated assembly. Initial use of the implementation indicates that encoding production rules is more difficult than with conventional text-only knowledge-based systems, but that this system is a more effective way to use artificial intelligence techniques in design.

Design System Mfk—An Important Step towards an Engineering Workbench

1993 ◽  
Vol 207 (2) ◽  
pp. 105-116 ◽  
Author(s):  
H Meerkamm
Keyword(s):  
Computer Aided Design ◽  
Tolerance Analysis ◽  
Design System ◽  
Product Model ◽  
Cad System ◽  
Knowledge Based ◽  
Different Types ◽  
Analysis Design ◽  
Aided Design ◽  
Production Tolerance

The Design System mfk will support the designer by an object-orientated synthesis of parts and an integrated knowledge-based analysis. An own-product model which is completely independent from the data structure of the used computer aided design (CAD) system contains all necessary information on geometry, technology, function and organization. It allows different types of analysis: design for production, tolerance analysis, cost and stress calculation, repeated component search, etc. Usable for products of higher complexity the Design System can be seen as an approach to an engineering workbench.

A knowledge-based system for computer-aided architectural design for energy savings and thermal comfort

1990 ◽  
Vol 4 (2) ◽  
pp. 71-88 ◽  
Author(s):  
L. F. Pau ◽  
S. Skafte Nielsen
Keyword(s):  
Computer Aided Design ◽  
Architectural Design ◽  
Energy Savings ◽  
Predicate Logic ◽  
Design Guidelines ◽  
Design System ◽  
Knowledge Based System ◽  
Knowledge Based ◽  
Computer Aided ◽  
Aided Design

This paper describes EKSPRO, a knowledge-based system integrating a 3-D computer-aided design system for materials, heating, ventilation, lighting equipment, building codes and occupational health regulations, and design guidelines user-defined by architects and engineers. The system features an object-oriented predicate logic knowledge representation, and interfaces with calculation packages (CAD, thermal balance, illumination, daylight).

Design and Implementation of a Prototype ‘Intelligent’ CAD System

1989 ◽  
Vol 111 (2) ◽  
pp. 252-258 ◽  
Author(s):  
M. J. Jakiela ◽  
P. Y. Papalambros
Keyword(s):  
Computer Aided Design ◽  
Design System ◽  
Production Rules ◽  
Automated Assembly ◽  
Knowledge Domains ◽  
Cad System ◽  
Design And Implementation ◽  
Knowledge Based ◽  
System Requirements ◽  
Aided Design

System requirements and system design for integrating a production rule program and a computer aided design system are presented. An implementation using a commercially available graphics modeling system is described. A “suggestive mode” interface is programmed as an example with application to design for automated assembly. Initial use of the implementation indicates that encoding production rules is more difficult than with conventional text-only knowledge-based system, but that this system is a more effective way to use artificial intelligence techniques in design. The system is intended for use with knowledge domains that are not well represented by usual analytical means.

KADS: A Knowledge Aided Mechanical Design System

1994 ◽  
Author(s):  
William Mark McVea ◽  
Kamyar Haghighi
Keyword(s):  
Iterative Process ◽  
Mechanical Design ◽  
Design Tool ◽  
Working Environment ◽  
Design System ◽  
New Approach ◽  
Analysis Techniques ◽  
Design Heuristics ◽  
Knowledge Based ◽  
Aided Design

Abstract Design is an inherently iterative process. This paper will present a knowledge based system that reduces this iterative process to a near minimum. To achieve this goal, the Knowledge Aided Design System (KADS) for mechanical components, uses the techniques of heuristically representing design intuition to evaluate conceptual ideas. The implementation of this design methodology represents a fundamentally new approach to assisting a designer. The trend within similar research is to develop each design tool to encompass more functionality. The research presented in this paper develops a morphology of incorporating design heuristics and analysis techniques into a unified working environment.

scholarly journals An interactive and immersive human–computer interface for rapid composite part production design

2017 ◽  
Vol 232 (13) ◽  
pp. 2276-2285
Author(s):  
Roisin McConnell ◽  
Joe Butterfield ◽  
Karen Rafferty ◽  
Mark Price ◽  
Adrian Murphy ◽  
...  
Keyword(s):  
Tacit Knowledge ◽  
Computer Aided Design ◽  
Assembly Planning ◽  
Parametric Modelling ◽  
Data Set ◽  
Design Concepts ◽  
Knowledge Based ◽  
Aided Design ◽  
Forming Tools ◽  
Physical Phenomena

This article addresses the need for better retention and exploitation of tacit knowledge for intelligent computer-aided design. It presents an automated design framework for the development of individual part forming tools for a composite stiffener incorporating parametrically developed design geometries. This work develops existing principles in knowledge-based engineering and parametric modelling beyond product design in the manufacturing planning domain. Outcomes demonstrate chronological benefits of automated process design methods as well as learning enhancements as the tacit knowledge data set can now include an applied element through an auto-generated virtual build environment. A virtual environment presenting a design concept to the planner for interactive assembly assessment was generated in twenty seconds and enabled the completion of virtual builds in support of the development of an optimal forming tool arrangement. This principle enables the addition of an experiential tacit knowledge feedback loop to further improve assembly planning for design concepts as they evolve. Challenges still exist in determining the level of reality required to provide an effective learning environment in the virtual world. Full representation of physical phenomena such as gravity, part clashes and the representation of standard build functions require further work to represent real physical phenomena robustly.

An Intelligent Planning Aid for the Design of Progressive Dies

1996 ◽  
Vol 210 (1) ◽  
pp. 25-35 ◽  
Author(s):  
B T Cheok ◽  
K Y Foong ◽  
A Y C Nee
Keyword(s):  
Cognitive Skills ◽  
Computer Aided Design ◽  
Planning Process ◽  
Design System ◽  
Knowledge Based ◽  
System A ◽  
Progressive Dies ◽  
Flexible Planning ◽  
Aided Design ◽  
Intelligent Planning

The design of progressive dies is a highly iterative planning process in which the designer attempts to select a die configuration which will produce a part most efficiently by minimizing material, tooling and maintenance costs while achieving the required part specifications. The planning process involves a considerable amount of human cognitive skills such as pattern recognition and matching (as in punch shape recognition) and spatial planning (as in nesting and staging of die processes) based on the geometrical features of the part. This paper describes an intelligent planning aid which can assist the die designer in planning progressive dies. The highly automated and yet flexible planning aid is developed by linking together a CAD (computer aided design) system, a knowledge-based system and a library of numerical routines.

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