Pascal Berruet

Component-based simulation for a reconfiguration study of transitic systems

This paper is organized as follows. Part A presents the context of reconfiguring transitic systems and the main idea in implementing the decision step. It comprises sections 1 to 3. Section 3 presents an example that illustrates the concepts presented in the next sections. Parts B and C express the models and principles used to simulate transitic systems, the result of which will be helpful for choosing the new configuration. Part B focuses mainly on models. It comprises sections 4 to 6. Part C focuses mainly on simulation principles. It comprises sections 7 to 10.

A component based approach for the design of FMS control and supervision

This paper deals with the reconfiguration of flexible manufacturing systems. It presents a methodology that addresses the whole reaction loop toward failures. The major key point is the component notion that provides an easy way to get several models used in the monitoring supervision and control modules. A component is a reusable element that is composed of several views including partial models. It is formalized referring to the notion of operations and described using UML standard. Three views are delineated in this paper: monitoring view, supervision view and control view. Workshop models are built from these three views. The computation and the interactions of these models enable to get a relevant reaction for the reconfiguration process. Works concerning the detection, identification of down operations, the decision of a new configuration and the updating of control are presented.

Conveyors With Rollers as Anticipatory Systems: Their Simulation Models

The conveyors with rollers are good examples for man‐made anticipatory systems in the weak sense, as they represent rather complex systems. The control of them has to anticipate into their future. Nowadays the control is performed by computers and an idea arises to implement the model serving for the anticipation as a simulation model running at the controlling computer. The quality of the design is tested by simulation, too, and therefore the design‐oriented simulation of the conveyors has to include their controlling and simulating computers. In other hand, the design‐oriented simulation has to reflect the operating‐oriented simulation. Some running models have been implemented using SIMULA and are presented.

An integrated design flow for the joint generation of control and interfaces from a business model

The design of large systems suffers from communication problems inside design team and inconsistencies in design documentation. We have identified two concurrent but complementary approaches for design. The first is a bottom-up approach where the design is made by aggregation of standard components. The second is a top-down approach where the design is made by successive refining of a model. This paper offers an integrated design flow for the joint generation of controls and users interfaces for reconfigurable sociotechnical systems. In accordance with our industrial feedback our approach is based on a business model called the synoptic, and on a library of standard elements. We describe the tool Anaxagore, that implements this approach and with which one can generate, in few minutes, a command and an interface for two simple input models. The results of the generation are consistent with the specifications.

Architecture and models of the DANAH assistive system

In this paper we present DANAH, an assistive system under development at the Lab-STICC laboratory at the European University of Brittany, in collaboration with the Kerpape center for functional reeducation and readaptation in Lorient. DANAH aims to be an almost all-in-one assistive system (ATS) which combines existing technologies to deliver suitable assistance for the disabled and the elderly. It focuses on both environmental control as well as navigation to help the physically impaired to perform everyday tasks and maintain a reasonable level of autonomy. Moreover, rapid prototyping methods have been introduced to speed up development, reduce costs and enforce ATS adoption.

Evaluation of Reconfigurable Manufacturing Systems configurations using tolerance criteria

Reconfigurable manufacturing systems have the ability to evolve in response to a change in their environment or a modification of their composition (after a failure of one of its components for instance). This paper propose to use the concept of architecture and configuration to describe both the invariant part of the system as well as the changeable one. The criticality analysis is computed on a configuration. Results can then be used to choose between configurations, enhance one or analyze reconfiguration capability of the configuration. Tools for applying this metric on the model are presented. Results are given for a sample RMS configuration

A MODEL FOR THE RECONFIGURATION OF MANUFACTURING SYSTEMS

Abstract This paper proposes a state of the art about reconfigurable systems and underlines existing links in system reconfiguration in the domains of electronics, mobile robotics and manufacturing systems. Then a model for describing reconfigurable systems is introduced. In this model, described using MOF class diagrams, the architecture of the system and its configuration are separated. This model will then be usable by a reconfiguration manager.

Model-Driven Flow for Assistive Home Automation System Design

Abstract People with disabilities sometimes have considerable difficulties, or even physical incapacities, performing daily tasks independently. Many research works have introduced home automation as a useful way to overcome these activity limitations. However, very few of these accomplishments have focused on the design of intelligent systems which would allow nonexperts to model and to adapt a home automation environment for the disabled. This design work is currently restricted to technicians, rather than occupational therapists or others who are able to best understand the needs of those with mobility or cognitive impairments. To take up these challenges, this paper proposes a design flow including a component approach for modeling system architecture and a range of services to meet the needs of both developers and users. Based on model driven engineering, it automates the control code generation for home automation systems.

Generation of control for conveying systems based on component approach

This paper proposes a methodology for automatic control generation of conveying systems. Its purpose is to automate the development of discrete control programs in order to reduce costs. It is based on components to model controlled conveying systems. A component is a reusable element that includes several views including partial models. It is formalized referring to the notion of operations. Four views are delineated in this paper: operating part view, constraints view, topological view and control view. The control model of the workshop is built on these views. The procedure uses these partial models and refers to model transformation to provide an easy way to obtain source code compatible with the IEC 61131-3 standard. Tools allowing to implement the methodology are also presented, along with some applications.

Using model engineering for the criticality analysis of reconfigurable manufacturing systems architectures

Reconfigurable Manufacturing Systems (RMS) have the ability to evolve in response to a change in their environment or a modification of their composition (after a failure of one of its parts for instance). In the first part, this paper introduces a model for the representation of these systems that takes into account the concepts of architecture (the components of the system) and configuration (the relations between the components) and separates the logical part constituted by products from the physical part constituted by resources. A UML representation is proposed for this model. The second part of this article deals with the concept of tolerance and proposes automatic evaluation from the UML representation of the architecture. More precisely, architecture part of the model is derived through model transformation into an analysis model for evaluating the capability of the system to provide its functions in spite of the failure of one of its elements.