Experimental study on fast and energy-efficient direct driven hydraulic actuator unit

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Experimental study on fast and energy-efficient direct driven hydraulic actuator unit. / Koitto, Teemu; Kauranne, Heikki; Calonius, Olof; Minav, Tatiana; Pietola, Matti.

julkaisussa: Energies, Vuosikerta 12, Nro 8, 1538, 24.04.2019.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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@article{27d3038c67be43bba6f57ac60cc53f60,
title = "Experimental study on fast and energy-efficient direct driven hydraulic actuator unit",
abstract = "In this experimental study, a Direct Driven Hydraulics (DDH) system of the closed circuit type was utilized for cyclic vertical actuation in heavy load material handling. The actuator was controlled by a speed-controlled fixed displacement pump. The high energy saving potential of this system has been demonstrated in previous studies by the authors, but the dynamic characteristics of the ramped and P-controlled base system were considered unsatisfactory. Therefore, the system was implemented with an open-loop S-curve control that utilized a pre-calculated RPM (revolutions per minute) profile for the electric motor in order to realize a smooth actuator and load transition as a function of time. The results indicate that S-curve control is exceptionally well suited for producing a controlled lifting–lowering rapid motion with a heavy load, while still keeping the actuator chamber pressures within acceptable limits. In comparison, the motion produced by P-control was characterized by large unwanted pressure peaks together with velocity fluctuations and vibrations at the end of the stroke. Using a combination of S-curve control and hydraulic load compensation, a mass of 1325 kg could be moved 0.26 m in less than 0.5 s. The load compensation reduced the energy consumption by 64{\%}, which would allow downsizing the electric motor and enable cost-efficient DDH implementation.",
keywords = "Controller, Direct driven hydraulics, Displacement-controlled hydraulics, Electro-hydraulic actuator, Energy efficiency, Industrial applications, S-curve",
author = "Teemu Koitto and Heikki Kauranne and Olof Calonius and Tatiana Minav and Matti Pietola",
year = "2019",
month = "4",
day = "24",
doi = "10.3390/en12081538",
language = "English",
volume = "12",
journal = "Energies",
issn = "1996-1073",
publisher = "MDPI AG",
number = "8",

}

RIS - Lataa

TY - JOUR

T1 - Experimental study on fast and energy-efficient direct driven hydraulic actuator unit

AU - Koitto, Teemu

AU - Kauranne, Heikki

AU - Calonius, Olof

AU - Minav, Tatiana

AU - Pietola, Matti

PY - 2019/4/24

Y1 - 2019/4/24

N2 - In this experimental study, a Direct Driven Hydraulics (DDH) system of the closed circuit type was utilized for cyclic vertical actuation in heavy load material handling. The actuator was controlled by a speed-controlled fixed displacement pump. The high energy saving potential of this system has been demonstrated in previous studies by the authors, but the dynamic characteristics of the ramped and P-controlled base system were considered unsatisfactory. Therefore, the system was implemented with an open-loop S-curve control that utilized a pre-calculated RPM (revolutions per minute) profile for the electric motor in order to realize a smooth actuator and load transition as a function of time. The results indicate that S-curve control is exceptionally well suited for producing a controlled lifting–lowering rapid motion with a heavy load, while still keeping the actuator chamber pressures within acceptable limits. In comparison, the motion produced by P-control was characterized by large unwanted pressure peaks together with velocity fluctuations and vibrations at the end of the stroke. Using a combination of S-curve control and hydraulic load compensation, a mass of 1325 kg could be moved 0.26 m in less than 0.5 s. The load compensation reduced the energy consumption by 64%, which would allow downsizing the electric motor and enable cost-efficient DDH implementation.

AB - In this experimental study, a Direct Driven Hydraulics (DDH) system of the closed circuit type was utilized for cyclic vertical actuation in heavy load material handling. The actuator was controlled by a speed-controlled fixed displacement pump. The high energy saving potential of this system has been demonstrated in previous studies by the authors, but the dynamic characteristics of the ramped and P-controlled base system were considered unsatisfactory. Therefore, the system was implemented with an open-loop S-curve control that utilized a pre-calculated RPM (revolutions per minute) profile for the electric motor in order to realize a smooth actuator and load transition as a function of time. The results indicate that S-curve control is exceptionally well suited for producing a controlled lifting–lowering rapid motion with a heavy load, while still keeping the actuator chamber pressures within acceptable limits. In comparison, the motion produced by P-control was characterized by large unwanted pressure peaks together with velocity fluctuations and vibrations at the end of the stroke. Using a combination of S-curve control and hydraulic load compensation, a mass of 1325 kg could be moved 0.26 m in less than 0.5 s. The load compensation reduced the energy consumption by 64%, which would allow downsizing the electric motor and enable cost-efficient DDH implementation.

KW - Controller

KW - Direct driven hydraulics

KW - Displacement-controlled hydraulics

KW - Electro-hydraulic actuator

KW - Energy efficiency

KW - Industrial applications

KW - S-curve

UR - http://www.scopus.com/inward/record.url?scp=85065465881&partnerID=8YFLogxK

U2 - 10.3390/en12081538

DO - 10.3390/en12081538

M3 - Article

VL - 12

JO - Energies

JF - Energies

SN - 1996-1073

IS - 8

M1 - 1538

ER -

ID: 34092916