In most cases it is justified to regard pipelines as lumped capacitances when hydraulic systems are simulated. In some cases, however, when the system is widely distributed the wave propagation effects in lines may become important and there exists very good models today to simulate these effects. The price to be paid is that of a much larger computational effort. In this paper, a numerically highly efficient model is presented which is just slightly more demanding than a model to represent a pure capacitance, yet it captures all the essential characteristics of a line, the finite wave propagation speed and the distributed frequency dependent friction. The model only calculates state variables at the ends of a line and not in any internal nodes as most models do. Despite this, the model gives good results both in the time and frequency domain which compared to more elaborate models. If for some reason internal state variables are wanted they can be obtained by representing a line with several line elements. The model is integrated in the library of the HOPSAN simulation package and has been used successfully for simulation of oil hydraulic systems as well as the human cardiovascular system.
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March 1994
Research Papers
Fast Pipeline Models for Simulation of Hydraulic Systems
Petter Krus,
Petter Krus
Division of Fluid Power Technology, Department of Mechanical Engineering, Linko¨ping University, S-58183 Linko¨ping, Sweden
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Kenneth Weddfelt,
Kenneth Weddfelt
Division of Fluid Power Technology, Department of Mechanical Engineering, Linko¨ping University, S-58183 Linko¨ping, Sweden
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Jan-Ove Palmberg
Jan-Ove Palmberg
Division of Fluid Power Technology, Department of Mechanical Engineering, Linko¨ping University, S-58183 Linko¨ping, Sweden
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Petter Krus
Division of Fluid Power Technology, Department of Mechanical Engineering, Linko¨ping University, S-58183 Linko¨ping, Sweden
Kenneth Weddfelt
Division of Fluid Power Technology, Department of Mechanical Engineering, Linko¨ping University, S-58183 Linko¨ping, Sweden
Jan-Ove Palmberg
Division of Fluid Power Technology, Department of Mechanical Engineering, Linko¨ping University, S-58183 Linko¨ping, Sweden
J. Dyn. Sys., Meas., Control. Mar 1994, 116(1): 132-136 (5 pages)
Published Online: March 1, 1994
Article history
Received:
March 25, 1991
Revised:
April 15, 1993
Online:
March 17, 2008
Citation
Krus, P., Weddfelt, K., and Palmberg, J. (March 1, 1994). "Fast Pipeline Models for Simulation of Hydraulic Systems." ASME. J. Dyn. Sys., Meas., Control. March 1994; 116(1): 132–136. https://doi.org/10.1115/1.2900667
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