LiU Electronic Press

# Konferensartikel

## Modeling and verification of an excavator system - Axial Piston Pump; Kinematics and Load Sensing Flow Sharing Valve Block

Paolo Casoli
Industrial Engineering Department, University of Parma, Italy

Luca Riccò
Industrial Engineering Department, University of Parma, Italy

Dolcin Cesare
Walvoil S.p.A., Reggio Emilia, Italy

Linköping Electronic Conference Proceedings 92:6, s. 53-63

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ISBN: 978-91-7519-572-8

ISSN: 1650-3686 (tryckt), 1650-3740 (online)

### Abstract

This paper presents the results of a study focused on mathematical modeling of an excavator hydraulic system; composed by: the pump gray box model; the kinematics model and the valve white box model. The kinematics model has been realized using the planar mechanical library of AMESim® and is composed by the front excavation tool: the arm; the boom and the bucket. The valve section white box model has been validate with the comparison between the numerical and experimental result obtained during the laboratory tests. The excavator is equipped by a full flow sharing valve; that is very useful in this kind of machinery when during a digging cycle all the valve sections are used at the same time. In this paper the excavator mathematical model system will be composed by the pump; the kinematics and two valve sections. The new system will be validated with the comparison between the experimental results; obtained with two sections working at the same time; and the numerical results provided by the simulation. The experimental results will be obtained in two different working conditions: standard operation condition and flow saturation condition. This will show the mathematical model capability in the study of the interaction between all the system components and could be useful in the study of alternative control strategies towards energy efficient systems and new control system designs

### Nyckelord

Hydraulic Excavator; Load Sensing; Mathematical Model; Energy Saving

### Referenser

[1] JCMAS H 020 – Earth Moving machinery – Test methods for energy consumption – Hydraulic excavators; 2010.

[2] J Ivantysyn ; M Ivantysynova. Hydrostatic Pumps and Motors; Tech Books International; New Delhi;2003; India. ISBN 81-88305-08- [3] Blakburn J. F.; Reethof G. & Shearer J. L. (1966) “Fluid Power Control”. USA: MIT Press; 1966. ISBN 0262520044

[4] P. Casoli; A. Anthony (2013) “Gray box modeling of an excavator’s variable displacement hydraulic pump for fast simulation of excavation cycles” Control Engineering Practice 21 (2013) pp.483-494. Elsevier Ltd. http:/dx.doi.org/10.1016/j.conengprac.2012.11.011

[5] LMS Imagine – AMESim® Reference manual 2011

[6] Shih-Tin Lin; Jiann-Nan Huang. (2002) .Stabilization of Baumgarte’s Method Using the Runge-Kutta Approach. In ASME Journal of Mechanical Design; vol. 124; n.4; pp. 633-641. December 2002.

[7] Grzesikiewicz; W. (1998). Dynamics of a ground digging tool. XI scientific Conference Problems of Work Machines; konferencja Naukova Problem Maszyn Roboczych) Polska: Zakopane; 1998.

[8] P. Casoli; A. Anthony; L. Riccò (2012) “Modeling of an Excavator System – Load sensing flow sharing valve model” SAE 2012 Commercial Vehicle Engineering Congress; Rosemont; Illinois; USA; 13-14 September 2012. doi: 10.4271/2012-01-2042H

[9] E Merritt. Hydraulic Control Systems. John Wileys and Sons; Cincinnati; Ohio; 1967. ISBN 0-471-59617-5.

[10] McCloy; D.; Martin; H. M. (1973). “The control of Fluid Power”; Longman; London; 1973.