A. Hugo
Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Sweden
K. Pettersson
Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Sweden
K. Heybroek
Volvo Construction Equipment AB, Eskilstuna, Sweden
P. Krus
Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Sweden
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http://dx.doi.org/10.3384/ecp1392a3Ingår i: 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden
Linköping Electronic Conference Proceedings 92:3, s. 21-30
Publicerad: 2013-09-09
ISBN: 978-91-7519-572-8
ISSN: 1650-3686 (tryckt), 1650-3740 (online)
The concept of hybrid technologies for mobile working machines has gained increased attention in recent years. This paper deals with a parallel hybrid system for energy recuperation based on a two-machine hydraulic transformer. The system can be connected hydraulically to an existing hydraulic circuit as a complementary add-on system. The linear analysis of the system visualises the control difficulties coming from a low inertia; slow control dynamics of the machines and the non-linear stick-slip friction during low speeds. A control strategy based on linear control methods is proposed and evaluated in a hardware test bench. It is shown that an acceptable performance can be achieved even with fairly simple models. Additionally; a start-up procedure is proposed to start the transformer from zero speed
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