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Control Parameters of Selected Electro-Hydraulic Valves for Robotic Excavators

Kamiński M., Szlagowski J.

Machine Dynamics Research

2016

Vol. 40, No. 3

53--65

This publication presents the results of research performed over a selected type of electrohydraulic pilot valves used for positioning of a spool in a mobile hydraulics directional control valve (DCV). The assumption for this research was to focus on the mobile hydraulics DCVs (i.e. components that can practically be utilized in a robotic excavator application) because their performance, susceptibility to environmental factors, etc. are different than those of stationary hydraulic components. The DCV characteristics, basic dynamic parameters like step and sinusoidal input response and hysteresis were evaluated for different ranges of required output flow rate and the dynamics of DCV response. The results of this research work were discussed in the context of using DCVs for control of a robotic excavator taking into account the expected performance and typical operation scenarios of this type of machinery. The goal was to emphasize what are the key parameters that determine the feasibility of using these valves in such application.