Article | 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden | Design Rules for High Damping in Mobile Hydraulic Systems
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Title:
Design Rules for High Damping in Mobile Hydraulic Systems
Author:
Mikael Axin: Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Sweden Petter Krus: Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Sweden
DOI:
10.3384/ecp1392a2
Download:
Full text (pdf)
Year:
2013
Conference:
13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden
Issue:
092
Article no.:
002
Pages:
13-20
No. of pages:
8
Publication type:
Abstract and Fulltext
Published:
2013-09-09
ISBN:
978-91-7519-572-8
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


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This paper analyses the damping in pressure compensated closed centre mobile working hydraulic systems. Both rotational and linear loads are covered and the analysis applies to any type of pump controller. Only the outlet orifice in the directional valve will provide damping to a pressure compensated system. Design rules are proposed for how the system should be dimensioned in order to obtain a high damping. The volumes on each side of the load have a high impact on the damping. In case of a small volume on the inlet side; the damping becomes low. However; the most important thing is to design the outlet orifice area properly. There exists an optimal orifice dimension for maximized damping; both smaller and larger orifice areas give lower damping independently of the volumes. This paper presents a method to dimension the outlet orifice area and the load volumes in order to obtain a desired system damping. Experimental results; which confirm the theoretical expectations; are also presented. The conclusions are that it is possible to obtain a high damping contribution from the outlet orifice if the system is dimensioned correctly. However; the energy efficiency needs to be considered while improving the damping

Keywords: Damping; compensator; outlet orifice; efficiency

13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden

Author:
Mikael Axin, Petter Krus
Title:
Design Rules for High Damping in Mobile Hydraulic Systems
DOI:
http://dx.doi.org/10.3384/ecp1392a2
References:

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[2] P. Krus. On Load Sensing Fluid Power Systems - With Special Reference to Dynamic Properties and Control Aspects. PhD thesis; Linköping University; 1988.

[3] B. Lantto. On Fluid Power Control with Special Reference to Load-Sensing Systems and Sliding Mode Control. PhD thesis; Linköping University; 1994.

[4] B.R. Andersson. Valves contribution to system damping. In The 5th Scandinavian International Conference on Fluid Power (SICFP’97); Linköping; Sweden; 1997.

[5] R. Rahmfeld and M. Ivantysynova. An overview about active oscillation damping of mobile machine structure. International Journal of Fluid Power; 5(2):5‚Äď24; 2004.

[6] H. Pettersson; P. Krus; A. Jansson; and J.-O. Palmberg. The design of pressure compensators for load sensing hydraulic systems. In UKACC International Conference on Control’96; 1996.

[7] D. Wu; R. Burton; G. Schoenau; and D. Bitner. Analysis of a pressure-compensated flow control valve. Journal of Dynamic Systems; Measurement; and Control; 129:203‚Äď 211; 2007.

[8] H.E. Merritt. Hydraulic Control Systems. John Wiley & Sons; Inc.; 1967.

[9] M. Axin; J.-O. Palmberg; and P. Krus. Optimized damping in cylinder drives using the meter-out orifice - design and experimental verification. In 8th International Fluid Power Conference (IFK); volume 1; pages 579‚Äď591; Dresden; Germany; 2012.

13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden

Author:
Mikael Axin, Petter Krus
Title:
Design Rules for High Damping in Mobile Hydraulic Systems
DOI:
http://dx.doi.org/10.3384/ecp1392a2
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