Characteristics of Digital Hydraulics with Commercial Controllers

Mikko Huova, Miika Ahopelto, Miikka Ketonen, Ville Ahola, Matti Linjama, Kalevi Huhtala

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

    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.
    Original languageEnglish
    Title of host publicationThe Seventh Workshop on Digital Fluid Power
    Pages114-128
    Number of pages15
    Publication statusPublished - Feb 2015
    Publication typeB3 Article in conference proceedings
    EventWorkshop on Digital Fluid Power -
    Duration: 1 Jan 1900 → …

    Conference

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

    Keywords

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

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