In classic passive suspension design, comfort and road handling are conflicting design criteria. An active or semi-active suspension offers the possibility to vary the damper characteristics along with the road profile. Existing systems have discrete settings or are limited in bandwidth up to 10 Hz. This paper discusses the development of a controller for a passenger car using a recently developed active stock absorber, were current controlled valves continuously vary the damper characteristics. The aim is to control the cars rigid body modes heave, roll and pitch, as well as wheelhop and the first bending and torsion modes. To facilitate the control design, the system is sprit up into two subsystems. The stock absorber, which is a highly nonlinear hydraulic system, is modelled by a dynamic neural network. Using the active stock absorber as an actuator, the car itself is identified using linear identification techniques based on random multisine excitations to find the best linear approximation of its dynamic behaviour. Based on the identified linear car model, linear controllers are derived. These controllers calculate the actuator forces that have to be generated by the active stock absorber. Based on the nonlinear damper models, these desired forces are converted into appropriate currents to be applied to the damper valves. This requires a nonlinear model inversion. The paper presents preliminary experimental results on a quarter car test set-up of a skyhook controller in combination with an inverse neural network damper controller.


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    Titel :

    Model based active suspension control for a passenger car


    Weitere Titelangaben:

    Modelbasierte aktive Radaufhängung für einen PKW


    Beteiligte:
    Lauwerys, C. (Autor:in) / Swevers, J. (Autor:in) / Sas, P. (Autor:in)


    Erscheinungsdatum :

    2002


    Format / Umfang :

    12 Seiten, 11 Bilder, 9 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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