Novel Concept for Electro-Hydrostatic Actuators for Motion Control of Hydraulic Manipulators

Konrad Johan Jensen, Morten Kjeld Ebbesen and Michael Rygaard Hansen
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Konrad Johan Jensen: Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway
Morten Kjeld Ebbesen: Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway
Michael Rygaard Hansen: Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway

Energies, 2021, vol. 14, issue 20, 1-27

Abstract: Self-contained hydraulic cylinders have gained popularity in the recent years but have not been implemented for high power articulated hydraulic manipulators. This paper presents a novel concept for an electro-hydrostatic actuator applicable to large hydraulic manipulators. The actuator is designed and analyzed to comply with requirements such as load holding, overload handling, and differential flow compensation. The system is analyzed during four quadrant operation to investigate energy efficiency and regenerative capabilities. Numerical simulation is carried out using path control and 2DOF anti-swing of a hydraulic crane as a load case to illustrate a real world scenario. A comparison with traditional valve-controlled actuators is conducted, showing significantly improved efficiency and with similar dynamic response, as well as the possibility for regenerating energy.

Keywords: electro-hydrostatic actuator; pump-controlled cylinder; four-quadrant operation; passive load-holding; servomotor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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