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Energy saving system utilizing LQ-technique design
Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.ORCID iD: 0000-0002-6371-1390
MCD Parker Hannifin AB.
Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
2009 (English)In: Proceedings of the Seventh International Conference on Fluid Power Transmission and Control: ICPF 2009 / [ed] Yongxiang, Lu and Qingfeng, Wang and Wei, Li and Bingfeng, Ju, Beijing: Beijing World Publishing Corporation , 2009, 224-229 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper deals with the control of individual metering systems. This paper deals with the control of an individual metering system that could be used for reducing metering losses by enabling recuperation and regeneration operation. A system that utilizes individual metering is more flexible than a conventional system since there are more control signals and thereby more outputs to control. Energy saving aspects is among the main reasons for the research on this kind of system, but there is also an opportunity of improvements of the dynamics compared to a conventional system. In this paper an approach with LQtechnique are presented for improvements of system dynamics. Since all states in the system can not be measured a state observer is also considered in the control design. These work present simulations, implementations in a real world forwarder application and results from verifying experiments.

Place, publisher, year, edition, pages
Beijing: Beijing World Publishing Corporation , 2009. 224-229 p.
Keyword [en]
fluid power, independent metering, energy savings, lq, flow amplifying poppet (fap), Valvistor, poppet valve
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:liu:diva-52028ISBN: 978-775062-8213-0 (print)OAI: oai:DiVA.org:liu-52028DiVA: diva2:278923
Conference
7th International Conference on Fluid Power Transmission and Control
Available from: 2009-11-30 Created: 2009-11-30 Last updated: 2015-08-31
In thesis
1. Mobile Fluid Power Systems Design: with a Focus on Energy Efficiency
Open this publication in new window or tab >>Mobile Fluid Power Systems Design: with a Focus on Energy Efficiency
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This work deals with innovative energy efficient fluid power systems for mobile applications. The subjects taken up concern to what extent and how energy losses can be reduced in mobile working hydraulics systems. Various measures are available for increasing energy efficiency in these kinds of systems. Examples include:

Flow controlled systems The pump controller is switched from a load sensing toa displacement controlled one. The displacement is controlled in an open loopfashion directly from the operator’s demand signals. This reduces energy consumptionat the same time as dynamic issues that are attached to LS systemscan be avoided.

Individual metering valve systems Flexibility is increased by removing the mechanicalcoupling between the meter-in and meter-out orifices in directionalvalves. An overview of this kind of system is given in the thesis. A designproposal that has been implemented is also presented. Initial test results areshown. Patents for this particular system have been applied for.

Displacement control Metering losses are reduced by removing the directional valves.One pump is used for each load in such systems. This hardware layout involvesconsiderable changes compared to conventional systems. Displacementcontrolled systems are not studied in this work.

In mobile applications, overall efficiency is often poor and losses are substantial. The measures listed above can help improve this significantly in such applications. A flow dividing system can decrease energy consumption by about 10% and an individual metering system by about 20%. Losses in pump controlled systems are difficult to give a figure for; the losses are rather attached to the pumps and motors and not to the system layout. However, the losses for these systems are presumably even lower than for individual metering systems. The main focus in this work is on individual metering systems but questions about which components and so on are also treated. For example, the Valvistor valve concept has been studied as part of this work.

 

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2010. 77 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1339
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-61362 (URN)978-91-7393-304-9 (ISBN)
Public defence
2010-11-19, Planck, Fysikhuset, ing°ang 57, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2010-11-16 Created: 2010-11-16 Last updated: 2015-08-31Bibliographically approved

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Björn, ErikssonRösth, MarcusPalmberg, Jan-Ove

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