摘要:
A device for estimating side slide velocity of a vehicle, comprising: a means for detecting longitudinal velocity of the vehicle body; a means for detecting yaw rate of the vehicle body about its center of gravity; a means for detecting lateral acceleration of the vehicle body at the center of gravity; and a means for integrating on time basis difference between the lateral acceleration detected by the lateral acceleration detection means and product of the yaw rate detected by the yaw rate detection means and the longitudinal velocity detected by the longitudinal velocity detection means such that only high frequency components thereof are integrated to produce a side slide velocity signal. The device may further comprise a means for estimating slip angle of at least either the front wheels or the rear wheels and converting the estimated slip angle into side slide velocity of the vehicle body at its center of gravity to produce a side slide velocity signal; and a means for summing the side slide velocity signal produced by the integration means and the side slide velocity signal produced by the slip angle estimation and conversion means to produce a final side slide velocity signal.
摘要:
The invention relates to a method for actuating an active suspension of a two-axle two-track motor vehicle, wherein forces directed opposite a roll of the vehicle superstructure either at the wheels of the rear axle or at the wheels of the front axis and oriented in the vertical direction can be directed into the wheel suspension between each wheel and the superstructure by means of at least one suitable actuator. Additionally, in order to achieve the goal of limiting the roll angle, a control with regard to the transverse dynamics is input into the actuation of the actuator, in addition to a servo-control with regard to the transverse dynamics of the vehicle. By suitably actuating the actuator as a function of the transverse acceleration currently acting on the vehicle in the sense of a transverse dynamic servo-control, a roll angle is preferably permitted or set, said angle optionally being derived substantially from a so-called friction-independent roll characteristic curve for neutral characteristic roll performance under consideration of an additional roll angle having a low magnitude and generating a slightly understeered driving performance, said angle providing the magnitude of a so-called neutral roll angle for each potential transverse acceleration, by means of which the vehicle performs neutrally, that is, neither oversteered nor significantly understeered.
摘要:
A system and method for estimating an operating parameter of a vehicle such as the steering angle offset or body slip angle. The method includes providing a dynamic vehicle model which is valid when the yaw rate and slip angle of the vehicle are either constant or changing. The vehicle model is reformulated to allow for the direct estimation of the steering angle offset value and/or the body slip angle. Estimation of an operating parameter of the vehicle may also include the use of a model difference term which is defined by the difference between a value estimated using the model and a measured value. A method for filtering the steering angle offset value is also provided. The filtering method may utilize a variable filter coefficient which varies in response to changes in the dynamic behavior of the vehicle.
摘要:
L'invention concerne un procédé de réglage d'un système de contrôle dynamique de trajectoire (ESP) pour véhicule automobile. Ce procédé comporte différentes étapes dont notamment: - l'établissement de la courbe des valeurs de consommations (Cesp) en fonction du temps, ladite courbe étant représentative des différences (dCM) des angles de lacets mesurés et de consignes de lacets (dCM = LM-LC) rapportées aux valeurs de seuil de déclenchement (St) mesurées, - la modification des valeurs de seuils nominales (Sv) d'un pourcentage qui est proportionnel aux valeurs de consommation (Cesp). Des revendications indépendantes sont inclues pour un procédé de sélection des caractéristiques pneumatiques et pour un procédé de réglage de la suspension.
摘要:
A vehicle-behavior detecting apparatus including a first-yaw-moment calculating unit (22), a second-yaw-moment calculating unit (23), and an indication-value calculating unit (24). Based on a linear bicycle model, the first-yaw-moment calculating unit (22) calculates a first yaw moment I·dγ/dt during constant-speed turning. The second-yaw-moment calculating unit (23) reads the longitudinal acceleration dv/dt detected by an acceleration sensor (28) in addition to the parameters read in the first-yaw-moment calculating unit (22), and calculates a second yaw moment M' during acceleration or deceleration. The indicating-value calculating unit (24) calculates a variation value M in the yaw moment showing the vehicle behavior from the difference between the first yaw moment I·dγ/dt during constant-speed turning and the second yaw moment M' during accelerated or decelerated turning. The variation in the yaw moment due to the vehicle-load shift during accelerated or decelerated turning is compensated for by the variation value M.
摘要:
A method for automatically adjusting a vehicle stability enhancement (VSE) system (10) is disclosed. The VSE system (10) is used in conjunction with a steering system having a plurality of driver-selectable steering modes associated therewith. In an exemplary embodiment, the method includes configuring a reference model (12) within the VSE system (10) to generate desired vehicle handling aspects, the desired vehicle handling aspects being a function of one or more driver inputs to the steering system. Then, a determination is made as to which of the plurality of driver-selectable steering modes is activated, wherein each of the desired vehicle handling aspects generated is made further dependent upon a specific steering mode selected.