Application of the Generic Modelling Method for System of Systems to Manufacturing Domain

Date: November, 2011

Linked to: RTD research at FAST

Contact information

Tampere University of Technology,

FAST Laboratory,

P.O. Box 600,

FIN-33101 Tampere,

Finland

Email: fast@tut.fi

www.tut.fi/fast

Conference: The 37th Annual Conference of the IEEE Industrial Electronics Society

Title of the paper: Application of the Generic Modelling Method for System of Systems to Manufacturing Domain

Authors: Bo Zhou, Aleksandra Dvoryanchikova, Andrei Lobov, Johannes Minor, Jose Luis Martinez Lastra

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Application of the Generic Modelling Method for System of

Systems to Manufacturing Domain Bo Zhou, Aleksandra Dvoryanchikova, Andrei Lobov, Johannes Minor,

Jose Luis Martinez Lastra

Contact: {aleksandra.dvoryanchikova, andrei.lobov}@tut.fi

www.tut.fi/fast

IECON 2011

08th of NovemberMelbourne Australia

System of Subsystems System of Systems

Conformance Independence

Centralization Decentralization

Platform-centric Network-centric

Homogeneous Heterogeneous

Foreseen Indeterminable

Autonomy

Belonging

Connectivity

Diversity

Emergence

Motivation: a) System of Subsystems vs. SoS

Motivation: b) SoS-definition

“Systems of systems are large-scale integrated systems that are heterogeneous and independently operable on their own, but are networked together for a common goal”

(Jamshidi, 2009)

System Property System Engineering SoS Engineering

Unit of analysis Single System Integration of Systems

Target Optimisation Realistic Cost and Scheduling

Point of Confusion End Point Initial Deployment

Requirements Fixed Evolving

Boundaries Well-defined Indefinable

Motivation: c) System Engineering vs. SoS Engineering

Background: Computational methods for SoS modelling

Traditional(Clark, 2009)

Building Blocks V-Model

SoS-specific

Domain Taxonomy

(DeLaurentis, 2008)

Definition by Characteristics

(Bawlding & Sauser, 2009)

Definition by Interface

(Gutirrez-Garcia et al., 2009)

Clear representation; Easy for paractical execution;

Ignores essential characteristics of SoS like communication and cooperation; System is more then subsystem congregation.

Expresses operational independence;

Further development for better readability

Agent-based approach and a language description.

Hypothesis:

Def. of Characteristics + Def. of Interface =

Description of the Production System

Approach

The generic method is proposed based on two Modelling methods:

• Modelling SoS based on its characteristics

(Baldwin and Sauser, 2009)

• Modelling SoS by definition of interface

(Gutirrez-Garcia, 2009)

7

Generic SoS modelling method

Generic Method for SoS-modelling:

Static Description: • Individual Actions and Goals• Sσi = { Aσi Gσi }

Dynamic Description:• Action and Goals as a legal

constituent system• Sδi = { Aδi Gδi }

SoS = { Si, … Sn, C, G }, n Z∈ +>1, G ≠ ∅

Autonomy (i) = | Aσi | Diversity (i) = Aσi

Connectivity:Sσ1 Sσ2 Sσ3 Sσ4 Sσ5 Sσ6

Sσ1 0 1 0 0 0 0

Sσ2 1 0 1 0 1 0

Sσ3 1 1 0 0 1 0

Sσ4 0 1 1 0 0 0

Sσ5 0 0 1 1 0 0

Sσ6 1 1 0 0 1 0

Si = { Sσi Sδi }

Belonging (i) =

Use case: Testbed - a production line

Use case: Testbed of a production line

Purpose: it is assumed that the method should work also for a traditional systems; a testbed was considered as an example of a traditional manufacturing system.

Actions definition

Conclusions:

The generic method is capable to describe constituent systems of SoS trough theirs characteristics and interfaces between them.

The ability of the method to describe goals and functionality of the constituent systems can provide detailed yet simple description of a heterogeneous, destributed systems of a large scale.

The applications of the method to the use cases show the aplicability to the domain of factory automation.

Further improvements and developments:• Extension of the use cases evaluating the approach.• A tool for SoS analysis and simulation should be developed.