Energy Saving in Electro-Hydraulic System Using Impedance Sensing

Abstract

In last decade, energy efficiency of hydraulic actuators systems has been especially important in industrial machinery applications. Even small improvements of efficiency in high loads fluid power system therefore often have a significant economic impact on the total cost. Fundamentally, most of these losses relates to motion control based on hydraulic resistance, this paper concerns the introduction of a new type of impedance controlled saving energy in hydraulic machinery. An impedance sensing concept is employed to optimize the quantitative energy of fluid power pressure and flow in hydraulic system. Results of experiment study are presented showing the potential improvement in term of energy saving and pressure servo performance offered by this method.