15th EUROPT Workshop on Advances in Continuous Optimization

Montréal, Canada, 12 — 14 juillet 2017

15th EUROPT Workshop on Advances in Continuous Optimization

Montréal, Canada, 12 — 14 juillet 2017

Horaire Auteurs Mon horaire
Cal add eabad1550a3cf3ed9646c36511a21a854fcb401e3247c61aefa77286b00fe402

Optimization in Engineering

13 juil. 2017 15h30 – 16h45

Salle: Nancy et Michel-Gaucher

Présidée par Edmondo Minisci

3 présentations

  • Cal add eabad1550a3cf3ed9646c36511a21a854fcb401e3247c61aefa77286b00fe402
    15h30 - 15h55

    Surrogate based Efficient Global MINLP Optimization and its application

    • Munoz Zuniga Miguel, prés., IFP Energies nouvelles
    • Delphine Sinoquet,
    • Faney Thibault, IFP Energies nouvelles

    Real industrial studies often boils down to complex optimization problems involving mixed variables and time consuming simulators. To deal with these difficulties we propose the use of a Gaussian process regression surrogate with a suitable kernel able to capture simultaneously the output correlations with respect to continuous and categorical/discrete inputs. The surrogate is integrated in the Efficient Global Optimization method based on the maximization of the Expected Improvement criterion. This maximization is a Mixed Integer Non-Linear problem which we tackle with an adequate optimizer : the Mesh Adaptive Direct Search, integrated in the NOMAD library. We implemented the proposed strategy and validated its accuracy on toy problems and real field cases.

  • Cal add eabad1550a3cf3ed9646c36511a21a854fcb401e3247c61aefa77286b00fe402
    15h55 - 16h20

    Observability of Power Systems

    • Margarida Carvalho, prés., Polytechnique Montréal
    • Xenia Klimentova, INESC TEC
    • Ana Viana, INESC TEC and School of Engineering, Polytechnic of Porto

    In a power system network, the currents in transmission lines and voltages at buses can be provided by Phasor Measurement Units (PMUs). An n-channel PMU measures the voltage of the bus it is placed in and the current in n adjacent lines. Furthermore, based on two fundamental electrical circuit laws, additional voltages and currents can be obtained. We aim to determine a location for the PMUs such that full observability of the network is guaranteed at minimum cost. To that end, we solve a bilevel integer programming model for which we present an efficient cutting plane approach.

  • Cal add eabad1550a3cf3ed9646c36511a21a854fcb401e3247c61aefa77286b00fe402
    16h20 - 16h45

    Uncertainty based Multidisciplinary Design Optimisation of Conventional Space Transportation Systems

    • Giulio Maddalena, University of Strathclyde
    • Diveu Alexis, Airbus Safran Launchers, Les Mureaux, France
    • Ducamp Christophe, Airbus Defence and Space, Toulouse, France
    • Minisci Edmondo, prés., University of Strathclyde
    • Ricardi Annalisa, University of Strathclyde

    An investigation of methods for the multidisciplinary design optimisation of conventional space transportation systems under model and environmental/operational conditions is presented. Simplified engineering models, including propulsion, mass, launch/mission, are coupled to cost/operational models, and then integrated within a multidisciplinary optimisation framework, including different approaches and methods for the uncertainty treatment. The objective is to evaluate the usability and usefulness of the probabilistic approaches for uncertainty quantification and compare them to evidence based approaches, when included into the design optimisation phase.

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