STW

Port-based approach of complex distributed-parameter system models for analysis and simulation (PACDAS, STW-TWI.6012)

Univ. Twente

Titel van het onderzoek

Port-based approach of complex distributed-parameter system models for analysis and simulation (PACDAS, STW-TWI.6012)

Omschrijving van het onderzoek

This project, funded by STW, is a cooperation between the Control Engineering Group and prof. Arjan van der Schaft of the Systems and Control Group at the Department of Mathematics. One PhD student, Norbert Ligterink, started in September 2003 on the project, and Goran Golo was a postdoc from February till December 2003. From January 2006, Damien Eberard, a postdoc from France, joined the project. He works mainly in Groningen, in the new Applied Analysis Group of Arjan van der Schaft started September 2005.

The research aim of the project is to create a synthesis between two successful approaches to modelling and simulation of physical engineering systems: the finite element approach to distributed-parameter system models, and the multi-physics port-based approach to lumped system models.

The purpose is the marriage of the accuracy and power of finite element methods, with the versatility, dynamics, and control of port-based modelling. There are several aspects to this synthesis. First, the port-based formulation of continuous, or distributed, systems, such that the dynamics can adapt the changing boundary conditions, i.e., port input. Second, a general geometric Hamiltonian formulation, such that flow, effort, and power conservation are exact, for a systematic approach, which can extend to several physics domains, which, e.g., eventually should yield proper models for damping. Third, model reduction methods, which can handle the configuration dependent dynamics, such as pre-strain, or varying load, where the essential dynamics of a distributed element is retained for a simulation, without the numerical effort of FEM. Fourth, a library of segments (beam, plate, solids, etc.), material properties (conductance, rigidity, etc.), and port-types (welding, screws, airgap) which are the basis for continuous dynamics simulation in 20-sim. Eventually, the practical implementation in 20-sim should lead to adaptive design methods, where the configuration can be optimized globally during the simulations.

Resultaten van het onderzoek

Papers

  • An energy based electroelastic beam model for MEMS applications Volume 121, Issue 2, 30 June 2005, Pages 500-507, Sensors and Actuators A: Physical.
  • Internal dynamics around static-deformation FEM states, UT Applied Mathematics Memorandum nr. 1756 (ISSN 0169-2690).
  • Physical model reduction of interacting, continuous systems , Abstract for the MTNS'06 conference in Kyoto, Japan.
  • Physical model reduction of interacting, continuous systems , Final submission for the MTNS'06 conference in Kyoto, Japan.

    • Presentations

  • Solving problems with symmetries, with symmetries (11-11-03 CE/EL/UT, html)
  • Introduction, PACDAS 1st gebruikerscommissie vergadering (25-11-03 UT, html)
  • Modern Physics, the symmetry principle (22-01-04, SSB/TW/UT, pdf)
  • Hybrid beam models(20-02-04, GEOPLEX/Linz, html)
  • Model Reduction and Port Construction, PACDAS 2nd gebruikerscommissie vergadering (03-06-04, Philips/Eindhoven, pdf)
  • The Control of a Thick Rotating Disk, PACDAS 3rd gebruikerscommissie vergadering (24-11-04, CE/EL/UT, html)
  • PACDAS poster at the National DISC day 26-11-04, TU Delft (pdf)
  • Zoeken naar het positron (21-4-05, Mathematisch Cafe EWI/UT, pdf)
  • Model Reduction and DTF, PACDAS 4th gebruikerscommissie vergadering (11-05-05, Dutch Space/Leiden, pdf)
  • Functional system dynamics(12-07-05, CE/EWI/UT, pdf)
  • Energy, energy flux, and control(29-07-05, workshop on PDE constrained optimization, Tomar, Portugal, pdf)
  • PACDAS 5th gebruikerscommissie vergadering (7-12-05, CE/EL/UT, pdf)
  • The minimal model of a continuous, physical system, and more (13-03-06, Benelux meeting on Systems and Control, Heeze, html)
  • PACDAS 6th gebruikerscommissie vergadering (Ligterink) (14-06-06, Oce/Venlo, pdf)
  • PACDAS 6th gebruikerscommissie vergadering (Eberard) (14-06-06, Oce/Venlo, pdf)
  • MTNS2006: Physical model reduction of interacting, continuous systems (Ligterink) (25-07-06, Kyoto, Japan, html)

    • Software

    In progress........

    Examples, Ideas

  • Water Cooling a hot Mould
  • The Problem of the Initial Guess for an Iterative FEM Solution
  • Examples of the DTF code
  • Deformation depending on fixture position
  • The broader context of PACDAS (Control+Model Reduction+Modularity)
  • Criteria and Goals of the PACDAS project
  • Dynamics of nonlinear Hamiltonians
  • Heat conductance: flow versus temperature
  • Nonlinear FEM: elastic film

    • Links

    A wide collection of links to related topics, groups, and software

    Gebruikerscommissie documenten

    Reports, minutes, data (access restricted)

    Gebruikerscommissie


    Prof.dr. A.J. van der Schaft
    Universiteit Twente
    Faculteit Elektrotechniek Wiskunde en Informatica
    Postbus 217
    7500 AE Enschede
    tel (053) 489 3449
    e-mail a.j.vanderschaft_@_math.utwente.nl
    and
    University of Groningen
    Department of Mathematics
    P.O. Box 800
    9700 AV Groningen
    tel (050) 363 3731
    e-mail A.J.van.der.Schaft_@_math.rug.nl

    Dr.ir. P.C. Breedveld
    Universiteit Twente
    Faculteit Elektrotechniek Wiskunde en Informatica
    Vakgr. Besturingssyst. and Computertechn.
    Lab. voor Regeltechniek
    Postbus 217
    7500 AE Enschede
    tel (053) 489 2792
    e-mail p.c.breedveld_@_utwente.nl

    Dr. G. Golo MSc. (till 31-12-2003)
    Universiteit Twente
    Faculteit Elektrotechniek Wiskunde en Informatica
    Systeem-, Signaal en Besturingstheorie
    Postbus 217
    7500 AE Enschede
    tel (053) 489 3469
    e-mail g.golo_@_math.utwente.nl

    Dr. N.E. Ligterink
    Universiteit Twente
    Faculteit Elektrotechniek Wiskunde en Informatica
    Regeltechniek
    Postbus 217
    7500 AE Enschede
    tel (053) 489 2817
    e-mail n.e.ligterink_@_utwente.nl

    Dr. D. Eberard
    University of Groningen
    Department of Mathematics
    P.O. Box 800
    9700 AV Groningen
    tel (050) 363 3732
    e-mail eberard_@_math.rug.nl

    Dr.ir. M.H.M. Ellenbroek
    Dutch Space BV
    Postbus 32070
    2303 DB Leiden
    tel (071) 524 5745
    e-mail m.ellenbroek_@_dutchspace.nl

    Prof.dr.ir. J.J.W. van der Vegt
    Universiteit Twente
    Faculteit Elektrotechniek Wiskunde en Informatica
    Mathematics of Computational Mechanics
    Postbus 217
    7500 AE Enschede
    tel (053) 489 5628
    e-mail j.j.w.vandervegt_@_utwente.nl,M.Plekenpol_@_utwente.nl

    Ir. C. Kleijn
    Controllab Products BV
    Postbus 217
    7500 AE Enschede
    tel (053) 489 3096
    e-mail christian.kleijn_@_controllab.nl

    Dr.ir. G.(Gert) van Schothorst
    Philips Applied Technologies - Mechatronics
    High Tech Campus 7 / Room 1.A.025
    5656 AE Eindhoven
    tel: 040 27 48611, Fax: 040 27 46344
    e-mail Gert.van.Schothorst_@_philips.com

    Dr.ir. B.B. Goeree (moved to Philips-Drachten August 2006)
    Océ-Technologies BV
    Postbus 101
    5900 MA Venlo
    tel (077) 359 33 90
    e-mail bgoe_@_oce.nl

    Ir. R. (Rob) van Loon
    Océ-Technologies B.V.
    Research and Development
    St. Urbanusweg 43
    5900 MA Venlo
    P.O. Box 101 tel (077) 359 2258
    e-mail rob.vanloon_@_oce.com

    Ir. D. Kroon / Ir. M. Ezendam
    REDEN
    Research Development Nederland
    Twekkelerweg 263
    7553 LZ Hengelo
    e-mail d.kroon_@_reden.nl

    Prof.dr.ir. J. van Amerongen
    Universiteit Twente
    Faculteit Elektrotechniek Wiskunde en Informatica
    Vakgr. Besturingssyst. and Computertechn.
    Lab. voor Regeltechniek
    Postbus 217
    7500 AE Enschede
    tel (053) 489 2791
    e-mail j.vanamerongen_@_utwente.nl

    Dr. R.D.T. Janssen, STW (till June 2005)
    STW
    Van Vollenhovenlaan 661
    3527 JP Utrecht
    rik.janssen_@_stw.nl

    Drs. M.T. (Marijke) de Jong, STW (from June 2005)
    STW
    Van Vollenhovenlaan 661
    3527 JP Utrecht
    e-mail m.dejong_@_stw.nl