Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit
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 be...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/8/1538 |
| _version_ | 1811306005163671552 |
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| author | Teemu Koitto Heikki Kauranne Olof Calonius Tatiana Minav Matti Pietola |
| author_facet | Teemu Koitto Heikki Kauranne Olof Calonius Tatiana Minav Matti Pietola |
| author_sort | Teemu Koitto |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T08:36:38Z |
| format | Article |
| id | doaj.art-5e39038b221140dcb9a8e268e0a48a25 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T08:36:38Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5e39038b221140dcb9a8e268e0a48a252022-12-22T02:54:04ZengMDPI AGEnergies1996-10732019-04-01128153810.3390/en12081538en12081538Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator UnitTeemu Koitto0Heikki Kauranne1Olof Calonius2Tatiana Minav3Matti Pietola4Department of Mechanical Engineering, Aalto University, 02150 Espoo, FinlandFiellberg Oy, FI-01720 Vantaa, FinlandDepartment of Mechanical Engineering, Aalto University, 02150 Espoo, FinlandDepartment of Mechanical Engineering, Aalto University, 02150 Espoo, FinlandDepartment of Mechanical Engineering, Aalto University, 02150 Espoo, FinlandIn 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.https://www.mdpi.com/1996-1073/12/8/1538electro-hydraulic actuatordirect driven hydraulicsdisplacement-controlled hydraulicsenergy efficiencycontrollerS-curveindustrial applications |
| spellingShingle | Teemu Koitto Heikki Kauranne Olof Calonius Tatiana Minav Matti Pietola Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit Energies electro-hydraulic actuator direct driven hydraulics displacement-controlled hydraulics energy efficiency controller S-curve industrial applications |
| title | Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit |
| title_full | Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit |
| title_fullStr | Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit |
| title_full_unstemmed | Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit |
| title_short | Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit |
| title_sort | experimental study on fast and energy efficient direct driven hydraulic actuator unit |
| topic | electro-hydraulic actuator direct driven hydraulics displacement-controlled hydraulics energy efficiency controller S-curve industrial applications |
| url | https://www.mdpi.com/1996-1073/12/8/1538 |
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