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Energy saving system utilizing LQ-technique design
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluid och mekanisk systemteknik. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0002-6371-1390
MCD Parker Hannifin AB.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluid och mekanisk systemteknik. Linköpings universitet, Tekniska högskolan.
2009 (Engelska)Ingår i: 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, s. 224-229Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Ort, förlag, år, upplaga, sidor
Beijing: Beijing World Publishing Corporation , 2009. s. 224-229
Nyckelord [en]
fluid power, independent metering, energy savings, lq, flow amplifying poppet (fap), Valvistor, poppet valve
Nationell ämneskategori
Farkostteknik
Identifikatorer
URN: urn:nbn:se:liu:diva-52028ISBN: 978-775062-8213-0 (tryckt)OAI: oai:DiVA.org:liu-52028DiVA, id: diva2:278923
Konferens
7th International Conference on Fluid Power Transmission and Control
Tillgänglig från: 2009-11-30 Skapad: 2009-11-30 Senast uppdaterad: 2015-08-31
Ingår i avhandling
1. Mobile Fluid Power Systems Design: with a Focus on Energy Efficiency
Öppna denna publikation i ny flik eller fönster >>Mobile Fluid Power Systems Design: with a Focus on Energy Efficiency
2010 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

 

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2010. s. 77
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1339
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
urn:nbn:se:liu:diva-61362 (URN)978-91-7393-304-9 (ISBN)
Disputation
2010-11-19, Planck, Fysikhuset, ing°ang 57, Campus Valla, Linköpings universitet, Linköping, 10:15 (Engelska)
Opponent
Handledare
Tillgänglig från: 2010-11-16 Skapad: 2010-11-16 Senast uppdaterad: 2020-02-19Bibliografiskt granskad

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