The formalism proposed in this article has allowed us to establish an efficient 'hydromultibody' model of a modern car equipped with a novel suspension technology. Thanks to the symbolic approach underlying our multibody program and to the way the hydraulic components have been assembled at the equational level, the complete model is able to run in real time on a standard computer, in a user-friendly environment (Simulink in this case), suitable for the needs of our industrial partner. The modelling of the hydraulic subsystem has been achieved without resorting to intermediate 'fictitious' elements, by properly coupling the hydraulic components on the basis of their equational representation and of the constraints imposed by their assembling. The hydraulic model has been implemented in order to be applied to other configurations of the H2 Kinetic suspension system. Another key point of our modelling approach is to ensure a rigorous coupling between the hydraulic and multibody dynamic models at the same integration time step, leading to a purely ODE formulation for the global system (hydraulic and mechanical constraints being solved during the global reduction) and without resorting to co-simulation techniques which require additional numerical techniques to obtain accurate results. Moreover, the use of co-simulation packages (with Simulink for instance), although proposed by most of commercial multibody programs, was not envisaged by our industrial partner for both economy and efficiency purposes. After a model identification performed on four-poster test rig, the expected performances of the Kinetic H2 system are highlighted and quantified by simulation, in comparison with a car equipped with classical suspensions and anti-roll bars. Using, as input, the carbody corner vertical accelerations and the damper velocities, a controller can now be designed in Simulink using the present model, as it was recently done by Tenneco Automotive for the same car with four independent semi-active dampers equipped with the same electrovalves. As usual, the goal is to obtain a good compromise between comfort (human body accelerations) and handling (roll, curve entry, over/understeering, etc.) and at longer term, to contribute, via reliable models, to the subjective evaluation of a given suspension system, with respect to the above-mentioned criteria.


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    Titel :

    Multiphysics modelling of multibody systems: Application to car semi-active suspensions


    Weitere Titelangaben:

    Multiphysik-Modellieren von Mehrkörpersystemen: Anwendung bei aktiven Fahrzeugfederungen


    Beteiligte:
    Docquier, N. (Autor:in) / Poncelet, A. (Autor:in) / Delannoy, M. (Autor:in) / Fisette, P. (Autor:in)

    Erschienen in:

    Vehicle System Dynamics ; 48 , 12 ; 1439-1460


    Erscheinungsdatum :

    2010


    Format / Umfang :

    22 Seiten, 19 Bilder, 18 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Multiphysics modelling of multibody systems: application to car semi-active suspensions

    Docquier, N. / Poncelet, A. / Delannoy, M. et al. | Taylor & Francis Verlag | 2010


    Multiphysics modelling of multibody systems: application to car semi-active suspensions

    Docquier,N. / Poncelet,A. / Delannoy,M. et al. | Kraftfahrwesen | 2010


    Semi-Active Suspensions

    Rajamani, Rajesh | Springer Verlag | 2006


    Multibody Modelling

    Genta, Giancarlo / Morello, Lorenzo | Springer Verlag | 2019