dc.contributor.author | Hagen, Daniel | |
dc.contributor.author | Padovani, Damiano | |
dc.date.accessioned | 2020-11-27T08:40:08Z | |
dc.date.accessioned | 2021-02-16T12:26:16Z | |
dc.date.available | 2020-11-27T08:40:08Z | |
dc.date.available | 2021-02-16T12:26:16Z | |
dc.date.issued | 2020-11-20 | |
dc.identifier.citation | Hagen, Padovani. A method for smoothly disengaging the load-holding valves of energy-efficient electro-hydraulic systems. Proceedings. 2020 | en |
dc.identifier.issn | 2504-3900 | |
dc.identifier.uri | https://hdl.handle.net/10642/9569 | |
dc.description.abstract | A novel self-contained, electro-hydraulic cylinder drive capable of passive load-holding, four-quadrant operations, and energy recovery was presented recently and implemented successfully. This solution improved greatly the energy efficiency and motion control in comparison to state-of-the-art, valve-controlled systems typically used in mobile or offshore applications. The passive load-holding function was realized by two pilot-operated check valves placed on the cylinder ports, where their pilot pressure is selected by a dedicated on/off electro valve. These valves can maintain the actuator position without consuming energy, as demonstrated on a single-boom crane. However, a reduced drop of about 1 mm was observed in the actuator position when the load-holding valves are disengaged to enable the piston motion using closed-loop position control. Such a sudden variation in the piston position that is triggered by switching the load-holding valves can increase up to 4 mm when open-loop position control is chosen. For these reasons, this research paper proposes an improved control strategy for disengaging the passive load-holding functionality smoothly (i.e., by removing this unwanted drop of the piston). A two-step pressure control strategy is used to switch the pilot-operated check valves. The proposed experimental validation of this method eliminates the piston position’s drop highlighted before and improves the motion control, mainly when operating the crane in open-loop. Theses outcomes benefit those systems where the kinematics amplifies the piston motion significantly (e.g., in aerial platforms) increasing, therefore, the operational safety. | en |
dc.description.sponsorship | The authors acknowledge the funding through the Norwegian Research Council projects Motion Lab (245717/F50) and SFI Offshore Mechatronics (237896). | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Proceedings;Volume 64, Issue 1, The 1st International Electronic Conference on Actuator Technology: Materials, Devices and Applications | |
dc.rights | Creative Commons Attribution 4.0 International (CC BY 4.0) License | en |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.subject | Linear actuators | en |
dc.subject | Self-contained cylinders | en |
dc.subject | Electro-hydraulic systems | en |
dc.subject | Passive load holding | en |
dc.subject | Load carrying applications | en |
dc.subject | Energy recoveries | en |
dc.subject | Energy efficiency | en |
dc.title | A method for smoothly disengaging the load-holding valves of energy-efficient electro-hydraulic systems | en |
dc.type | Journal article | en |
dc.type | Peer reviewed | en |
dc.date.updated | 2020-11-27T08:40:08Z | |
dc.description.version | publishedVersion | en |
dc.identifier.doi | https://doi.org/10.3390/IeCAT2020-08478 | |
dc.identifier.cristin | 1853235 | |
dc.source.journal | Proceedings | |
dc.relation.projectID | Norges forskningsråd: 237896 | |