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Characteristics of Digital Hydraulics with Commercial Controllers

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

Details

Original languageEnglish
Title of host publicationThe Seventh Workshop on Digital Fluid Power
PublisherLinz Center of Mechatronics
Pages114-128
Number of pages15
ISBN (Print)978-3-200-04014-4
Publication statusPublished - Feb 2015
Publication typeB3 Non-refereed article in conference proceedings
EventWorkshop on Digital Fluid Power -
Duration: 1 Jan 1900 → …

Conference

ConferenceWorkshop on Digital Fluid Power
Period1/01/00 → …

Abstract

Model-based control algorithms of digital hydraulic valves offer optimized control performance, but are computationally heavy. Research work has been carried out using PC hardware such as dSPACE real-time systems. In order to apply digital hydraulic valve control in real, series production application, the algorithms should be redesigned such that controllers with limited computation power are sufficient. The paper presents methods for lowering the computational burden and shows the effect of optimization methods in execution time. Model-based controller design is carried out in MATLAB/Simulink and automatic code generation is used in implementation phase. A wheel loader equipped with digital hydraulic valve system is presented as a test case, where control algorithms are implemented on commercial Bosch Rexroth BODAS RC controller. Preliminary work for computationally faster control algorithms is carried out on mobile boom mock-up. The methods presented decrease the execution time to approximately 1/194 of the original.

Keywords

  • Digital Hydraulics, Digital Valve System, Digital hydraulic valve control, DFCU, Optimization, Mobile machine

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