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Flux Observer for Spool Displacement Sensing in Self-Sensing Push-Pull Solenoids

机译:用于自感推拉螺线管中阀芯位移感测的磁通观测器

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Spool position feedback in an electrohydraulic valve typically requires a spool displacement sensing device such as a LVDT. Self-sensing is the methodology to obtain spool displacement information directly from the solenoid spool actuators, thus obviating the additional cost and footprint of a LVDT or another displacement sensing device. A self-sensing scheme that uses only the measurement of electrical signals to the pair of push-pull solenoids was first proposed in [1]. It uses the position dependence of electrical inductance in the solenoids to infer the spool displacement. The scheme in [1] relies on a flux observer and several infinite dimensional filters that require explicit resets, and is prone to singularity. The present paper proposes a modified scheme in which the flux observer (and hence the self-sensing) problem is cast in a linear time varying system setting so that standard linear observer design techniques can be brought to bear.
机译:电液阀中的卷轴位置反馈通常需要诸如LVDT的阀芯位移传感装置。自感应是直接从螺线管阀芯致动器获得阀芯位移信息的方法,从而避免了LVDT或另一个位移传感装置的额外成本和占地面积。首先在[1]中首先使用仅使用对一对推拉螺线管测量电信号的自感应方案。它使用电感在螺线管中的位置依赖性来推断卷轴位移。 [1]中的方案依赖于磁通观测器和几个无限尺寸过滤器,这些滤波器需要显式重置,并且易于奇点。本文提出了一种修改的方案,其中在线性时间变化系统设置中施放了通量观测器(以及因此自感应)问题,从而可以将标准的线性观测器设计技术带入。

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