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    Steering control method and control system for wheeled vehicles
    1.
    发明授权
    Steering control method and control system for wheeled vehicles 失效
    轮式车辆转向控制方法及控制系统

    公开(公告)号：US5029660A

    公开(公告)日：1991-07-09

    申请号：US505749

    申请日：1990-04-06

    申请人： Joseph M. Raad ,  Geoffrey F. Bridges

    发明人： Joseph M. Raad ,  Geoffrey F. Bridges

    IPC分类号： B62D6/00

    CPC分类号： B62D6/00

    摘要： A feedback control method and system are provided to accurately control the steering assist level in a vehicle steering system. An electric actuator, such as a solenoid, operates a flow control valve that controls the flow of control fluid in a vehicle steering system in relation to driver and vehicle inputs such as vehicle speed and the angular position and velocity of a hand-wheel of the steering system. The flow of the control fluid is utilized by the steering system to provide a power assist steering force. A feedback signal based on the actual measured current of the solenoid is generated after a hardware filter filters the measured current. There is a time lag associated with the filtered feedback signal. A software filter filters an initial control signal which represents the desired steering assist level to maintain a similar time relationship between the feedback signal and the initial control signal. An error signal is generated by comparing the feedback signal and the filtered initial control signal. The initial control signal is then modified by the error signal to obtain a final control signal which compensates for varying system operating conditions.

    摘要翻译： 提供反馈控制方法和系统以精确地控制车辆转向系统中的转向辅助水平。 诸如螺线管的电动致动器操作流量控制阀，该流量控制阀控制车辆转向系统中的控制流体相对于驾驶员和车辆输入的流量，所述驾驶员和车辆输入例如车辆速度以及手轮的角位置和速度 转向系统。 控制流体的流动由转向系统利用以提供动力辅助转向力。 在硬件滤波器对测量的电流进行滤波之后，产生基于螺线管的实际测量电流的反馈信号。 与滤波后的反馈信号相关联的时间滞后。 软件滤波器对表示所需转向辅助电平的初始控制信号进行滤波，以保持反馈信号和初始控制信号之间的类似的时间关系。 通过比较反馈信号和滤波的初始控制信号来产生误差信号。 然后通过误差信号修改初始控制信号，以获得补偿不同系统操作条件的最终控制信号。

    Method and apparatus for maintaining vehicular ride height
    3.
    发明授权
    Method and apparatus for maintaining vehicular ride height 失效
    保持车辆行驶高度的方法和装置

    公开(公告)号：US5430647A

    公开(公告)日：1995-07-04

    申请号：US986407

    申请日：1992-12-07

    申请人： Joseph M. Raad ,  Jon R. Watson ,  Geoffrey F. Bridges ,  David K. French

    发明人： Joseph M. Raad ,  Jon R. Watson ,  Geoffrey F. Bridges ,  David K. French

    IPC分类号： B60G17/016 ,  B60G17/00

    CPC分类号： B60G17/016 ,  B60G2202/152 ,  B60G2202/412 ,  B60G2400/204 ,  B60G2400/252 ,  B60G2500/30 ,  B60G2500/32

    摘要： Method and apparatus for maintaining vehicular ride height in a vehicle having a body, front and rear wheels and an air suspension including front and rear air springs. The method includes sensing vehicle body height relative to the wheels to obtain front and rear vehicle height signals, and sensing vehicle speed to obtain a vehicle speed signal. The method also includes processing the front height signals to obtain a vehicle roll signal that has been compensated for the natural lean of the vehicle, the vehicle roll signal indicating vehicle roll due to steering adjustments by the vehicle operator. The method further includes processing the vehicle speed signal to obtain a vehicle pitch offset signal, indicating vehicle body height change due to longitudinal vehicle acceleration. The method also includes adjusting the height of the vehicle toward a predetermined target ride height based on the vehicle height sensor signals which have been compensated for vehicle roll and pitch.

    摘要翻译： 具有主体，前后轮和包括前后空气弹簧的空气悬架的车辆中的车辆行驶高度的保持方法和装置。 该方法包括相对于车轮识别车身高度以获得前后车高信号，以及感测车速以获得车速信号。 该方法还包括处理前方高度信号以获得已经补偿了车辆的自然倾斜的车辆滚动信号，由车辆驾驶员的转向调节指示车辆侧倾的车辆滚动信号。 该方法还包括处理车速信号以获得车辆俯仰偏移信号，指示由于纵向车辆加速度引起的车体高度变化。 该方法还包括基于车辆滚动和俯仰补偿的车辆高度传感器信号来调整车辆的高度朝向预定的目标乘坐高度。