Keiichi Shirase

Knowledge and Skill Chains in Engineering and Manufacturing

Enhancing Knowledge and Skill Chains in Manufacturing and Engineering.- Enhancing Knowledge and Skill Chains in Manufacturing and Engineering.- Generic Infrastructure Requirements and Components.- Engineering Information Infrastructure for Product Lifecycle Managment.- Architecting an Ubiquitous & Model Driven Information Infrastructure.- Service Modeling for Service Engineering.- The Extended Products Paradigm, An Introduction.- Process Plant Information Integration in Three Dimensions.- Using Contexts in Managing Product Knowledge.- Object-Oriented Design Pattern Approach to Seamless Modeling, Simulation and Implementation of Distributed Control Systems.- An Interoperability Framework and Capability Profiling for Manufacturing Software.- IT-Supported Modeling, Analysis and Design of Supply Chains.- Multi-Strata Modeling in MCM and CLM for Collaborative Engineering.- Ontological Stratification in an Ecology of Infohabitants.- Logics of Becoming in Scheduling.- Communication in the Digital City and Artifact Lives.- Validating MEDIQUAL Constructs.- External Collaboration.- Distributed Engineering Environment for Inter-Enterprise Collaboration.- Agent Based Manufacturing Capability Assessment in the Extended Enterprise Using Step AP224 and XML.- Inter-Enterprise Planning of Manufacturing Systems Applying Simulation with IPR Protection.- A Study on Support System for Distributed Simulation System of Manufacturing Systems Using HLA.- Method and Tool for Design Process Navigation and Automatic Generation of Simulation Models for Manufacturing Systems.- Knowledge Management in BID Preparation for Global Engineering and Manufacturing Projects.- Supply Chain Engineering and the Use of a Supporting Knowledge Management Application.- A Planning Framework for the Deployment of Innovative Information and Communication Technologies in Procurement.- Supreme: Supply Chain Integration by Reconfigurable Modules.- Tools and Methods for Risk Management in Multi-Site Engineering Projects.- Development of an After-Sales Support Inter-Enterprise Collaboration System Using Information Technologies.- Collaborative Service in Global Manufacturing - a New Paradigm.- Remote Maintenance Support in Virtual Service Enterprises.- Factory Floor Infrastructure.- Intelligent Process Planning and Control Framework for the Internet.- Implementation of a Data Gathering System with Scalable Intelligent Control Architecture.- Creation of Feature Sets for Developing Integrated Process Planning System.- Proposal of Modification Strategy of NC Program in the Virtual Manufacturing Environment.- Dynamic Co-Operative Scheduling Based on HLA.- A Study on Data Handling Mechanism of a Distributed Virtual Factory.- A Study on Real-Time Scheduling Methods in Holonic Manufacturing Systems.- Sensitivity Analysis of Critical Path and Its Visualization in Job Shop Scheduling.- Enterprise Integration of Management and Automation in a Refinery.- Man-System Collaboration.- CAI System with Multi-Media Text Through Web Browser for NC Lathe Programming.- Web Based Operation Instruction System Using Wearable Computer.- Model-Based Description of Human Body Motions for Ergonomics Evaluation.- Model-Based Motion Analysis of Factory Workers Using Multi-Perspective Video Cameras.- Human Factor and its Identification in Manufacturing Prediction.

Knotting/raveling manipulation of linear objects

A planning method for linear object manipulation including knotting/raveling in the three-dimensional space is proposed. Firstly, topological states of a linear object are represented as finite permutations of crossing points including the crossing type of each crossing point. Secondly, transitions among the topological states are defined. They correspond to operations that change the number of crossing points or crossing point permutation. Then, we can generate possible sequences of crossing state transitions, that is, possible manipulation processes from an initial state to a given objective state. Thirdly, a method for determination of grasping points and their moving direction is proposed in order to realize derived manipulation processes. Furthermore, criteria for evaluation of manipulation processes are introduced in order to reduce the candidates of manipulation plans. Finally, it is demonstrated that our developed system based on the above method can generate manipulation plans for raveling from an overhand knot.

Action-based union of the temporal opposites in scheduling: non-deterministic approach

Abstract It is the time resource that one deals with in scheduling. The task is how one can achieve the optimal allocation of a given time resource over a set of assigned activities. Most of the existing scheduling methods use a parametric time by which the activities are orderly allocated in accordance with the order of events. The parametric methods, however, fail in incorporating a dynamic aspect of scheduling that unfolds itself as the project proceeds, and also uncertainty that the starting and ending nodes of an activity fluctuate. This paper reformulates the concept of time to match to a dynamic scheduling through a non-deterministic approach. In particular, time can be regarded as an object in the holographic space, which models the dynamic aspects of time as a “mapped/represented” and “transformed/processed” temporal movement.

Representation and planning of deformable linear object manipulation including knotting

A qualitative representation method and a rough planning method of linear object manipulation including knotting in the three-dimensional space is proposed. Firstly, states of a linear object are represented as finite permutations of crossing points including the crossing type of each crossing point. Secondly, state transitions among those states are defined. They correspond to operations which change the number of crossing points or permutate their sequence. Then, we can generate possible sequences of crossing state transitions, that is, possible manipulation processes when the initial state and the objective state are given. Thirdly, a method for determination of grasping points and their moving direction in order to realize derived manipulation processes is proposed. Furthermore, some criteria for evaluation of manipulation processes are introduced in order to narrow down candidates for manipulation plans. Finally, that our proposed method can be applied to the rough planning of linear object manipulation is demonstrated.

Development of disassembly support system for mechanical parts and its application to design considering reuse/recycle

Recently, the design for disassemblabality/recyclability becomes more important from the viewpoint of Life Cycle Assessment or Emission-Minimum. Therefore, a disassembly support system which can be applied to the design considering reuse/recycle is developed. First, an algorithm for verifying disassemblability of parts as briefly explained. Next, a method for estimate the total number of feasible disassembly sequences without actually generating them is proposed. Furthermore, an order to reduce the number of disassembly sequences, precedence constraints such as the assembly feature are introduced. Finally, the efficiency of our developed disassembly sequence generation system is demonstrated and it is shown that the design can be evaluated from the viewpoint of disassemblability/recyclability by using our system.

Dynamic Schedule Management Architecture Based on Parts and Packets Unified Product System

In a construction project, although the completion day of the project is clearly decided, construction schedule is often changed by the weather or the actual progress situation of the project. Therefore, when a difference arises between present state and the master schedule, it is necessary to adjust the construction schedule and to execute immediately. Besides, since a construction project is usually carried out as a cooperative work by many companies, how to transmit information smoothly and how to share them together are an important issue. In this paper, the dynamic scheduling management system architecture that is based on the parts and information packets unified technology is proposed. We assumed that each part or unit has a data career, which handle such as identification number, position of the part, state of the part. Some of them re used to define the part’s identity. They are given as the initial data, and are unchangeable and static for each part. Another kind of information is changeable and dynamic. Using these data, progress of the project process is compared with the master schedule. If the difference arises between them, scheduling system derived the present workability of each section/machine/people and dynamically re-schedule to optimize the processes. A pilot system that realized our proposal is developed and applied to a case study. As a result, the system can derive the changing state of section/machine/people and make the dynamic re-schedule by using the data originating in the part or unit.

Dynamic Management Architecture for Human Oriented Production System

In advanced factories, human workers or craftsmen are required to achieve highly flexible and skillful production. This paper introduces a dynamic management architecture for human oriented production systems. The proposed architecture includes two technologies; one is a communication network based on an active database system, and the other is a dynamic scheduling method to reflect the workers’ satisfaction, ability and flexibility. It has been verified by several case studies that the dynamic management architecture proposed is effective in realizing an efficient human oriented production system, which considers the workers’ satisfaction, ability and flexibility.

Communication network system for CAD of functional decompostion

The present CAD/CAM systems transfer the geometric models of design objects mainly, and designers can not understand others’ way of thinking with use of them. It is desired to transfer the designers’ way of thinking via computer systems as well as design object descriptions. Design process starts in general by the input of the requirements/specifications. They are decomposed to the detailed ones. This paper deals with the communication network system among designers in the early conceptual design stage where the functional decomposition plays an important role.