Dynamic Analysis of Single Pump, Flow Controlled Mobile Systems
2011 (English)In: The Twelfth Scandinavian International Conference on Fluid Power, SICFP'11: Volume 2 / [ed] Harri Sairiala & Kari T. Koskinen, 2011, 223-238 p.Conference paper (Refereed)
Interest has increased in flow controlled systems in the field of mobile fluid power. The capital distinction between traditional load-sensing (LS) systems and flow controlled systems is that the pump is controlled based on the operator’s total flow demand rather than maintaining a certain pressure margin over the maximum load pressure. One of the main advantages of flow controlled systems is the absence of the feedback of the highest load pressure to the pump controller. In this paper, a dynamic analysis is performed where flow controlled and LS systems are compared. It is shown how instability can occur in LS systems due to the pump controller and proven that no such instability properties are present in flow controlled systems. A drawback with one type of flow controlled system is that the highest load dynamically will disturb the lighter loads. This paper shows a novel way to optimize the damping in such systems by controlling the opening position of the directional valve independently of the flow. The mentioned disturbance between the highest load to the others can thereby be reduced.
Place, publisher, year, edition, pages
2011. 223-238 p.
Flow control, load sensing, dynamic analysis, stability, damping
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-68636ISBN: 978-952-15-2519-3OAI: oai:DiVA.org:liu-68636DiVA: diva2:419024
The Twelfth Scandinavian International Conference on Fluid Power, SICFP'11, May 18-20, 2011 Tampere, Finland