Improving resolution of digital hydraulic valve system by utilizing fast switching valves
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|Otsikko||Proceedings of the Third Workshop on Digital Fluid Power, October 13-14 2010, Tampere, Finland|
|Toimittajat||Arto Laamanen, Matti Linjama|
|Tila||Julkaistu - 2010|
|OKM-julkaisutyyppi||A4 Artikkeli konferenssijulkaisussa|
A Digital flow control unit (DFCU) consists of a certain number of parallel connected on/off-valves, which are basically controlled by using pulse code modulation (PCM). In order to limit costs and installation space the number of valves in a DFCU has to be kept as low as possible. As a consequence the relative control resolution of such a system is limited especially for small flow rate of the DFCU. In the presented paper the use of fast switching valves for improvement of the control resolution of a cylinder drive is studied. Experimental measurements are presented and analyzed.