Though attentions are focused on advanced electric and hybrid vehicles from the environmental points of view, the electric powered vehicles (EPV) have the advantages not only of low impact to the environment but also of their motion to be controlled more easily than conventional vehicles for active motion control. Once an EPV is equipped with four in-wheel motors for each wheel, it is easy to control the four tire longitudinal forces independently for more sophisticated vehicle motion control. In addition, the four wheels of the vehicle are easily possible to be steered independently by some electro magnetic actuators to control four tire lateral forces for the motion control. Then EPV will easily become a full drive-by-wire vehicle, which has the eight control variables (4 longitudinal forces and 4 lateral forces). Thus the lateral and longitudinal forces of the four wheels of the vehicle are controlled independently by steer angle and motor torque of each wheel to follow basically any given vehicle response to steer and acceleration/brake commands. Though any vehicle response is available for this vehicle by appropriately controlling lateral and longitudinal forces of each tire, some reasonable tire force distribution algorithms to each tire with some distribution norms are introduced in this study. The effects of the distribution controls are investigated using the experimental vehicle on a proving ground as well as with the computer simulation. The control effects are evaluated from a view point of reducing total tire energy dissipation during vehicle motion due to tire slip as well as from a view point of higher vehicle handling performance. The conclusions are: (1) The tire force distribution controls with the on-line estimation algorithm of the tire energy dissipation due to slip reducing the energy dissipation are proposed for full drive-by-wire electric vehicles. (2) The numerical simulation is executed to predict the effects of the distribution controls on reducing the energy dissipation. (3) In order to verify the effects of the controls, an experimental full drive-by-wire electric vehicle is introduced and the experimental substantiation of the effects of the controls is carried out on a proving ground. (4) It is found that the distribution control with minimizing squared sum of exact energy dissipation rate proposed is the most effective control on reducing the tire energy dissipation in this study, which is confirmed to be practical for us to apply it to a real vehicle. (5) Also it is confirmed that the distribution control with minimizing tire work-load is less effective and rather brings us ill-effect on reducing the tire slip energy dissipation.


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    Titel :

    Tire force distribution control to reduce energy dissipation due to tire slip during vehicle motion for full drive-by-wire electric vehicle


    Beteiligte:
    Abe, Masato (Autor:in) / Kano, Yoshio (Autor:in) / Suzuki, Nobuyuki (Autor:in) / Hirata, Junichi (Autor:in) / Sugai, Tomohiro (Autor:in) / Matsuoka, Daisuke (Autor:in)


    Erscheinungsdatum :

    2013


    Format / Umfang :

    16 Seiten, 10 Bilder, 5 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch