Digital hydraulic multi-pressure actuator – the concept, simulation study and first experimental results

Research output: Contribution to journalArticleScientificpeer-review


  • Mikko Huova
  • Arttu Aalto
  • Matti Linjama
  • Kalevi Huhtala
  • Tapio Lantela
  • Matti Pietola

Research units

  • Tampere University of Technology


The decentralisation of hydraulic systems is a recent trend in industrial hydraulics. Speed variable drive is one concept where an actuator is driven by an integrated pump, thus removing the need for control valves or complex centralised variable displacement hydraulic units and long pipelines. The motivation for the development is the need to improve the energy efficiency and flexibility of drives. A similar solution to mobile hydraulics is not currently available. This paper studies a digital hydraulic approach, which includes a local hydraulic energy storage located together with the actuator, the means to convert efficiently energy from the storage to mechanical work and a small start-/stop-type pump unit sized according to mean power. The simulation results and first experimental results show that the approach has remarkable energy saving potential compared to traditional valve controlled systems, but further research is needed to improve the controllability.


Original languageEnglish
Pages (from-to)141-152
Number of pages12
Issue number3
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

    Research areas

  • Digital hydraulics, hybrid actuator, integrated actuator

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