Delta-Sigma Modulated Displacement of a Digital Fluid Power Pump

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review


Successful application of digital fluid power displacement pumps rely on proper control of the actively controlled high pressure and low pressure manifold valves. This paper concerns a method, where the valve timing control and the overall displacement modulation are separated. The displacement chambers of the pump are operated in full-stroke mode and a pulse density modulation method is used to approximate a desired displacement output. This pulse density modulation is performed with delta-sigma modulation, whereby the chamber activation pattern is determined. The method is implemented in a simulation model of a digital hydraulic pump in order to exemplify the use of it.
Original languageEnglish
Title of host publicationProceedings of the 7th Workshop on Digital Fluid Power
Number of pages8
PublisherLCM GmbH
Publication dateFeb 2015
ISBN (Print)978-3-200-04014-4
Publication statusPublished - Feb 2015
Event7th Workshop on Digital Fluid Power - Linz, Austria
Duration: 26 Feb 201527 Feb 2015


Conference7th Workshop on Digital Fluid Power


  • Digital Fluid Power Displacement
  • Delta-sigma modulation
  • Digital Displacement
  • Hydraulic pump
  • Pulse Density Modulation


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