ACTIVE ADAPTIVE HYDRAULIC RIPPLE CANCELLATION ALGORITHM AND SYSTEM
    3.
    发明申请
    ACTIVE ADAPTIVE HYDRAULIC RIPPLE CANCELLATION ALGORITHM AND SYSTEM 审中-公开
    主动自适应液压纹波消除算法与系统

    公开(公告)号:US20140294601A1

    公开(公告)日:2014-10-02

    申请号:US14242636

    申请日:2014-04-01

    Abstract: Hydraulic pumps/motors are used to convert between rotational motion/power and fluid motion/power. Pressure differential is achieved across the pump/motor by applying torque to either aid or impede rotation which generally results in either a pressure rise or pressure drop respectively across the unit. This torque is often supplied by an electric motor/generator. Especially in positive displacement pumps/motors this pressure differential is not a smooth value but rather it contains high frequency fluctuations known as pressure ripple that are largely undesirable. With thorough analysis it can be discovered that these fluctuations occur in a predictable manner with respect to the position (angular or linear) of the pump/motor. Using a model that contains this information, a feed-forward method of high-frequency motor torque control is implemented directly on the hydraulic pump/motor by adding to the nominal torque, a model-based torque signal that is linked to rotor position. This high-frequency signal acts directly on the hydraulic pump/motor to reduce or cancel the pressure/flow ripple of the pump/motor itself without the need for any secondary flow generating devices.

    Abstract translation: 液压泵/电机用于在旋转运动/功率和流体运动/功率之间转换。 通过施加扭矩来帮助或阻止旋转,通过泵/马达实现压差,这通常导致单元上的压力上升或压降。 该扭矩通常由电动机/发电机提供。 特别是在容积式泵/电动机中,该压差不是平滑的值,而是包含被称为压力波动的高频波动,这在很大程度上是不希望的。 通过彻底的分析,可以发现这些波动相对于泵/马达的位置(角度或线性)以可预测的方式发生。 使用包含该信息的模型,通过增加与转子位置相关联的基于模型的扭矩信号的额定转矩,直接在液压泵/电机上实现高频电机转矩控制的前馈方法。 这种高频信号直接作用在液压泵/马达上,以减少或消除泵/马达本身的压力/流动波动,而不需要任何二次流产生装置。

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