Authors: None

Abstract:

Keywords:

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00001

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: c1-c1

Authors: None

Abstract:

Keywords:

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.01655

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: c4-c4

Authors: Eduardo F. Camacho; Luis Basanez; Juan A. de la Puente

Abstract:

Keywords:

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00002

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: ---

Authors: John L. Eatman; Vidyaranya B. Gargeya

Abstract: The development of global supply chains during the last decade of the twentieth century has had a great impact on the apparel industry. Apparel industry firms face a wide array of challenges relating to the proliferation of product variety, changing product styles, shortened lead times, and reduced prices. As a result of these pressures, apparel companies have been forced to redesign their manufacturing and distribution organizations and to build supporting information systems. These tasks are complicated by the need to support widely dispersed and frequently changing manufacturing organizations while maintaining efficient logistic and inventory systems. At the same time, the apparel company is faced with coping with the cost pressures endemic to the apparel industry. This paper presents a synthesis of the global supply chain concept as it applies to the apparel industry and relates how one company is attempting to use an Enterprise Resource Planning (ERP) system to provide the basis for operational control of an increasingly complex operating environment.

Keywords: business process,enterprise integration,information systems,information integration,international stability

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00003

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 1-1

Authors: Alexandre Dolgui; Nikolai Guschinsky; Genrikh Levin

Abstract: This paper is devoted to a preliminary design problem of paced automatic transfer lines. The aim is to choose a logical layout of the line which minimises its cost subject to the given productivity and technological constraints. The paper focuses on a mathematical model of the problem and a method to solve it. The proposed method is based on the transformation of the initial problem into a constrained shortest path problem.

Keywords: production systems,preliminary design,mathematical programming,graph theory,optimisation

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00004

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 2-2

Authors: Thecle Lecompte; Rachid Alami; Jean-Christophe Deschamps; Jean-Paul Bourrieres

Abstract: MRP-like approach is not always enough efficient to manage distributed manufacturing systems performing various complex products. This paper proposes a model supporting the desegregation of technical data, in order to provide to any decision maker in a multi-level management structure, information required to perform planning and scheduling production activities.

Keywords: management systems,manufacturing systems,technical data models

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00005

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 3-3

Authors: Chin-I Liu; P. A. Ioannou

Abstract: In machine job shops with automated guided vehicles (AGVs) as mean of transportation of job parts, it's usually hard to determine the optimal fleet size of AGVs for achieving a desired performance. In this paper a heuristic AGV dispatching algorithm is constructed based on the concept of ideal pipeline and Petri Net theory to balance the job part scheduling and AGV dispatching that minimize the number of AGVs for achieving zero idle time of the machine. The problem is formulated as polynomial equations owing to the mathematical property of Petri Net and since obtaining the optimal solution is computationally difficult, a way to circumvent the difficulty is necessary for the real application of the algorithm. A heuristic dispatching algorithm that schedules the dispatch of AGVs on a selected window basis is used to reduce the computation time and makes the dispatching algorithm capable of real time implementation.

Keywords: automated guided vehicles,Petri net,heuristic,scheduling,dispatching

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00006

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 4-4

Authors: Corinne Boutevin; Michel Gourgand; Sylvie Norre

Abstract: This paper deals with the study of a line balancing problem. The considered problem is issued from the automotive industry. It consists in gradually assembling vehicles which go through a line. Assembly operations are made by workstations placed along the line. The goal is to assign operations to these workstations in order to minimize different criteria while satisfying several constraints. To solve this problem, stochastic algorithms are applied, namely stochastic descent and simulated annealing, for which two neighboring systems are proposed. They are applied on generated data and industrial data and provide interesting results.

Keywords: automotive industry,decision-making,mathematical models,operations research,optimization problems

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00007

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 5-5

Authors: Hisashi Tamaki; Kazutoshi Sakakibara; Hajime Murao; Shinzo Kitamura

Abstract: In this paper, an extended class of flexible shop scheduling problems is considered. First, the problem is translated into a mathematical programming formula, i.e., a mixed-integer programming problem. This makes it possible to apply standard packages of mixed integer programming solvers and, while lots of computational time is required in general, to obtain the optimal schedule. Then, in order to seek the schedules close to the optimal for larger-scale problems, a solution method by adopting genetic algorithms based on the formula is newly designed. Through some computational experiments, the effectiveness and the potential of the proposed approach are investigated.

Keywords: scheduling,optimization,mathematical programming,integer programming,search methods,genetic algorithms

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00008

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 6-6

Authors: Sergio Cavalieri; Marco Taisch

Abstract: The paper will provide an overview of the main scope, objectives and future actions of the worldwide IMS Network of Excellence (NoE). The main aim of the IMS-NoE is to create the proper environment to group academic and industrial communities for developing co-operation links, for co-ordinating current and future research, for facilitating knowledge transfer and dissemination of project results and for assessing the technological development and expertise in Europe in the key areas of design, engineering and control of manufacturing systems in the extended enterprise.

Keywords: manufacturing systems,design,control,simulation

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00009

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 7-7

Authors: Paul Valckenaers; Hendrik Van Brussel; Olaf Bochmann; Hadeli Hadeli; Martin Kollingbaum

Abstract: Many useful manmade systems in this world are extremely complex; a typical example is a large infrastructure. No design team ever invents these artefacts because they are too complex. The artefacts are made by combining existing elements (legacy) and by building new subsystems without explicit and comprehensive up-front coordination. To a large extent, these complex systems emerge and evolve. Experience shows that designers often fail to develop artefacts that, when combined, facilitate the emergence of effective and efficient emerging systems. This paper formally elaborates the mechanism behind this phenomenon, and proposes design principles for the design of emergent systems' components. These principles are discussed and illustrated.

Keywords: complex systems,constraints,co-ordination,design systems,integration,manufacturing systems

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00010

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 8-8

Authors: Duncan McFarlane; Sanjay Sarma; Jin Lung Chirn; C. Y. Wong; Kevin Ashton

Abstract: The authors are involved in a major, industrially-funded, research project which is connecting manufactured components and products to the internet. The Auto-ID project will enable unique information about a particular item to be stored, retrieved, communicated to others and even used in automated decision making relevant to that item. In this way we begin to build a specification for an intelligent product - one whose information content is permanently bound to its material content. This paper will begin to explore the impact of such developments on manufacturing shop floor control and management and will in particular, examine the way in which so called distributed, intelligent manufacturing control methods can be enhanced.

Keywords: manufacturing control,automatic identification,distributed systems,holonic manufacturing,multi-agent systems

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00011

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 9-9

Authors: Claudio R. Boer; Francesco Jovane

Abstract: Mass Customisation, meant as an approach to product definition and conception that aims at a direct involvement of the consumer in all phases of its life cycle, implies making use of appropriate tools and technologies, especially in all crucial phases of manufacturing. In particular, the manufacturing systems adopted should exhibit the maximum level of integration and flexibility to cope with the extreme fragmentation of the production batches and with the very short response time that these new business model requires. A further enhancement to flexibility is re-configurability. The paper introduces these concepts and give an example for shoe mass customisation.

Keywords: flexible manufacturing systems,mass customization

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00012

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 10-10

Authors: Masaki Arao; Shigeyasu Kawaji

Abstract: In this paper, we propose a generic concept of "Flexible Intelligence Machine Control (FIMC)" which acquires control knowledge from the operation data of expert operators and places higher-level automation on conventional-level cnotrol. And we show two practical examples of FIMC including temperature control on the actual jacket tank in polymerization process and automatic start-up operation of plastics extruder.

Keywords: flexible intelligence machine control,intelligent control,fluctuation factors,jacket tank,plastic extruder

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00013

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 11-11

Authors: Paul Valckenaers; Hendrik Van Brussel; Hadeli Hadeli; Martin Kollingbaum; Olaf Bochmann

Abstract: This paper discusses a multi-agent coordination and control system design, inspired by the behaviour of social insects. This design makes desirable overall system behaviour emerge without exposing individual agents to the complexity and the dynamics of the overall system. This enables these individual agents to survive changes without maintenance, it allows individual agents to be re-usable across systems, and it allows having the emergent behaviour handle disturbances. The paper starts with the biological concept, stigmergy, that constitutes the basis of the coordination and control system. Next, it discusses the different steps in the development of a coordination and control system.

Keywords: agents,control systems design,co-operation,co-ordination,intelligent manufacturing systems,manufacturing systems

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00014

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 12-12

Authors: Grzegorz Dobrowolski; Marek Kisiel-Dorohinicki; Edward Nawarecki

Abstract: This work introduces a new evolutionary approach to search for a global solution to multiobjective optimisation problem in the Pareto sense. Novelty of the proposed method consists in application of an evolutionary multi-agent system (EMAS) instead of classical evolutionary algorithms. Decentralisation of the evolution process in EMAS allows for intensive exploration of the search space and effective approximation of the whole Pareto frontier. In the paper the intended application of the proposed technique as a core of a decision support system for balancing of production lines is described.

Keywords: multiobjective optimisation,multi-agent systems,evolutionary computation,balancing of production lines

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00015

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 13-13

Authors: Gregory Levitin; Jacob Rubinovitz; Boris Shnits

Abstract: Robotic assembly line balancing (RALB) is specific for robotic assembly, where different robots require different assembly times to perform the same task because of their specialization. The problem includes optimal assignment of robots to line stations and balanced distribution of work between different stations. It aims at maximizing the production rate of the line. This problem is solved by a genetic algorithm (GA). Different procedures for adapting the GA to the RALB problem are introduced, including a local optimization (hill climbing) work-piece exchange procedure. The best combination of these procedures is reached by testing on a set of randomly generated problems.

Keywords: assembly lines,robots,productivity,genetic algorithms,hill climbing

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00016

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 14-14

Authors: A. J. D. Lambert

Abstract: Aimed at detection of parallel assembly modes, a method for assembly graph construction is described that is based on the systematic generation and analysis of precedence relations and their application to subassembly detection. This method dramatically reduces the search space for detailed analysis and avoids the use of precedence graphs.

Keywords: assembly,Boolean algebra,combinatorial algebra,disassembly,graphs,optimization,production control,sequences,scheduling algorithms

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00017

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 15-15

Authors: J. M. Henrioud; L. Relange; C. Perrard

Abstract: In this paper, the authors propose an original method for the determination of precedence graphs for Assembly Line Design. This method is based on the transformation of a set of assembly sequences into an hypergraph including "and" and "or" precedence relations between assembly tasks. The resulting hypergraph may be straightforwardly transformed into a set of ordinary precedence graphs. It is also possible to develop Assembly Line Balancing (or Assembly Line Design) algorithms directly from the proposed hypergraph.

Keywords: algorithms,assembly,computer-aided system design,planning,production

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00018

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 16-16

Authors: Antoneta Bratcu

Abstract: This paper deals with the modelling of a particular class of manufacturing lines, governed by a rule imposing the self-balancing. Bucket brigades were first studied as stochastic dynamic systems. Thus, a sufficient condition for self-balancing was proved. Under some particular conditions, bucket brigades may be regarded as nonlinear dynamic systems. Simulations have shown that their state trajectories are piecewise continuous in between occurrences of certain discrete events. Bucket brigades may therefore be modelled as hybrid dynamic systems, more precisely, with autonomous switching and autonomous jumps. A stability analysis is possible in the frame of hybrid dynamic systems with discontinuous motions.

Keywords: production systems,self-organising systems,stochastic modelling,hybrid dynamic systems

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00019

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 17-17

Authors: Christian Mascle

Abstract: In this paper, algorithms are presented in order to determine the best disassembly sequence for a sub-assembly and a system life-cycle model for disassembly-assembly line design. The main contribution consists in the determination of a sequence which has the minimal number of components to disassemble, taken into account several criteria: stability, the geometrical form, operations done in parallel, and the irreversible operations. The integration of assembly and disassembly is advantageous for the activation of higher value as per assembly, repair, maintenance and reuse of parts, components and products.

Keywords: assembly,system design,computer-aided manufacturing,adaptive systems,CAD/CAM Models,reversibility,algorithms,database structures

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00020

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 18-18

Authors: Chung-Wei Cheng; Mi-Ching Tsai; Ming-Yang Cheng

Abstract: This study explores the feasibility of variable feedrate parametric interpolators for real-time motion command generation using a digital signal processor (DSP). Most of the existing parametric interpolators are developed for a constant federate due to the computational complexity. However in certain applications, in order reduce the deterioration in accuracy of machining, feedrate commands should be performed in advance to overcome excessive acceleration/deceleration of CNC machines. The aim of this study is to develop a real-time parametric interpolator with variable federate where acceleration/deceleration planning on the feedrate command is performed before the interpolation takes place. This approach that would provide new capabilities for advanced CAD/CAM systems, can compensate for the path command error caused by the acceleration/deceleration after interpolation. To justify the performance of the real-time control interpolator, an X-Y table driven by two servomotors is controlled to track a parametric curve represented in non-uniform rational B-Spline (NURBS) form.

Keywords: CAD/CAM,digital signal processor,parametric interpolator

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00021

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 19-19

Authors: V. Chapurlat; B. Kamsu-Foguem; F. Prunet

Abstract: To develop or to improve a system requires to specify very early the user waits and the requirements which this system will have to answer throughout its life. So, languages of representation and mechanisms of validation and of check are necessary to describe and manage the reality complexity then to ensure the resultant system performs well its role and reach its objectives with a minimum level of risk. The concept of property is so often evoked. This article proposes a model allowing the representation and the manipulation of property concept as well as a reference repository of properties.

Keywords: system engineering,behavior analysis,life cycle,model reference

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00022

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 20-20

Authors: Weihua Sheng; Ning Xi; Mumin Song; Yifan Chen

Abstract: A CAD-guided vision sensor planning system is developed in our lab. To improve the efficiency of the inspection system, the path planning problem is rendered as a Traveling Salesman Problem (TSP). A new approach is developed to solve the TSP into its sub-optimality quickly. First, viewpoints are clustered into several groups. Second, clustered Traveling Salesman Problem is solved by favoring the inter-group paths. Experimental results on real parts show that the proposed approach is effective.

Keywords: CAD,path planning,traveling salesman problem

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00023

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 21-21

Authors: John E. Ettlie; Victor J. Perotti

Abstract: A representative sample of 60 firms drawn from the Fortune 1000 that had recently adopted Enterprise Resource Planning (ERP) systems were used to test a model of weak appropriation with significant results. Leadership (social learning theory), business process reengineering (change the company not the technology) and acquisition strategy (buy, don't make), controlling for EDI (electronic data interchange), when the project was begun, industry (manufacturing versus service) and scale (sales) and were found to be significant predictors of adoption performance (final model R-square=43%, F=5.5, p<.001, df=7,52). In general, strong, hands-on leadership, and business process re-engineering coupled with purchasing ERP systems was found to be a much more effective adaptation strategy than tailoring enterprise software.

Keywords: enterprise resource planning,leadership,business process reengineering,acquisition strategy

Digital Object Identifier (DOI): 10.3182/20020721-6-ES-1901.00025

Conference: Proceedings of the 15th IFAC World Congress, 2002

Location: , Barcelona, Spain

Start Date: Sun Jul 21 2002 - End Date: Fri Jul 26 2002

Page Numbers: 23-23