The doctoral dissertations of the former Helsinki University of Technology (TKK) and Aalto University Schools of Technology (CHEM, ELEC, ENG, SCI) published in electronic format are available in the electronic publications archive of Aalto University - Aaltodoc.

A Companion Model Approach to Modelling and Simulation of Industrial Processes

Kaj Juslin

Dissertation for the degree of Doctor of Technology to be presented with due permission of the Department of Automation and Systems Technology at Helsinki University of Technology (Espoo, Finland) for public examination and debate in Auditorium AS1 (Otaniementie 17, Espoo), on the 23rd of September, 2005, at 12 o'clock noon.

Dissertation in PDF format (ISBN 951-38-6660-2)   [1253 KB]
VTT Publications 574, ISSN 1455-0849

Dissertation is also available in print (ISBN 951-38-6659-9)
Copyright © 2005 VTT Technical Research Centre of Finland
VTT Publications 574, ISSN 1235-0621


Modelling and simulation provides for huge possibilities if broadly taken up by engineers as a working method. However, when considering the launching of modelling and simulation tools in an engineering design project, they shall be easy to learn and use. Then, there is no time to write equations, to consult suppliers' experts, or to manually transfer data from one tool to another.

The answer seems to be in the integration of easy to use and dependable simulation software with engineering tools. Accordingly, the modelling and simulation software shall accept as input such structured design information on industrial unit processes and their connections, as provided for by e.g. CAD software and product databases.

The software technology, including required specification and communication standards, is already available. Internet based service repositories make it possible for equipment manufacturers to supply "extended products", including such design data as needed by engineers engaged in process and automation integration. There is a market niche evolving for simulation service centres, operating in co-operation with project consultants, equipment manufacturers, process integrators, automation designers, plant operating personnel, and maintenance centres.

The companion model approach for specification and solution of process simulation models, as presented herein, is developed from the above premises. The focus is on how to tackle real world processes, which from the modelling point of view are heterogeneous, dynamic, very stiff, very nonlinear and only piece vice continuous, without extensive manual interventions of human experts. An additional challenge, to solve the arising equations fast and reliable, is dealt with, as well.

Keywords: industrial processes, process simulation, simulation models, simulation software, software implementation, systems architecture, model specification, structured graphs, companion models, sparse matrices

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© 2005 Helsinki University of Technology

Last update 2011-05-26