Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator

Søren Stubkier, Henrik C. Pedersen, Torben Ole Andersen, Andreas Madsen, Mads Dahl

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Currently mobile hydraulics is in a transition phase, where electronic sensors and digital signal processors are becoming standard on a high number of machines,
hereby replacing hydraulic pilot lines and offering new possibilities with regard to both control and feasibility. As most open-circuit pumps are still hydraulically controlled, there is however still a need for being able to generate a
hydraulic pilot pressure. The focus of the current paper is on the analysis and controller design of an electrohydraulic servo pressure regulator, which generates a hydraulic LS-pressure for a variable displacement pump based on an electrical reference.
The paper first presents the considered system and an experimentally verified model of this. A linearized model and a stability analysis is then presented, based on which an H∞control strategy is selected. A nominal performance
and a robustly stable controller are designed and tested in simulation and experimentally. Finally both controllers are compared to the reference system, finding that similar performance may be obtained, but the used FPGA limits the performance.
Original languageEnglish
Title of host publicationProceedings of the 2011 International Conference on Fluid Power and Mechatronics (FPM)
Number of pages6
PublisherIEEE Press
Publication date2011
Pages516-521
ISBN (Print)978-1-4244- 8449-2
Publication statusPublished - 2011
Event2011 International Conference on Fluid Power and Mechatronics (FPM) - Beijing, China
Duration: 17 Aug 201120 Aug 2011

Conference

Conference2011 International Conference on Fluid Power and Mechatronics (FPM)
CountryChina
CityBeijing
Period17/08/201120/08/2011

Fingerprint

Pressure regulators
Hydraulics
Controllers
Pumps
Digital signal processors
Field programmable gate arrays (FPGA)
Networks (circuits)
Sensors

Keywords

  • Hydraulics
  • Mechanics
  • Electronics
  • Robust controller design
  • Modeling
  • Stability
  • Sensitivity

Cite this

Stubkier, S., Pedersen, H. C., Andersen, T. O., Madsen, A., & Dahl, M. (2011). Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator. In Proceedings of the 2011 International Conference on Fluid Power and Mechatronics (FPM) (pp. 516-521). IEEE Press.
Stubkier, Søren ; Pedersen, Henrik C. ; Andersen, Torben Ole ; Madsen, Andreas ; Dahl, Mads. / Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator. Proceedings of the 2011 International Conference on Fluid Power and Mechatronics (FPM). IEEE Press, 2011. pp. 516-521
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Stubkier, S, Pedersen, HC, Andersen, TO, Madsen, A & Dahl, M 2011, Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator. in Proceedings of the 2011 International Conference on Fluid Power and Mechatronics (FPM). IEEE Press, pp. 516-521, 2011 International Conference on Fluid Power and Mechatronics (FPM), Beijing, China, 17/08/2011.

Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator. / Stubkier, Søren; Pedersen, Henrik C.; Andersen, Torben Ole; Madsen, Andreas ; Dahl, Mads.

Proceedings of the 2011 International Conference on Fluid Power and Mechatronics (FPM). IEEE Press, 2011. p. 516-521.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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AU - Andersen, Torben Ole

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AU - Dahl, Mads

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AB - Currently mobile hydraulics is in a transition phase, where electronic sensors and digital signal processors are becoming standard on a high number of machines, hereby replacing hydraulic pilot lines and offering new possibilities with regard to both control and feasibility. As most open-circuit pumps are still hydraulically controlled, there is however still a need for being able to generate a hydraulic pilot pressure. The focus of the current paper is on the analysis and controller design of an electrohydraulic servo pressure regulator, which generates a hydraulic LS-pressure for a variable displacement pump based on an electrical reference. The paper first presents the considered system and an experimentally verified model of this. A linearized model and a stability analysis is then presented, based on which an H∞control strategy is selected. A nominal performance and a robustly stable controller are designed and tested in simulation and experimentally. Finally both controllers are compared to the reference system, finding that similar performance may be obtained, but the used FPGA limits the performance.

KW - Hydraulics

KW - Mechanics

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KW - Modeling

KW - Stability

KW - Sensitivity

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Stubkier S, Pedersen HC, Andersen TO, Madsen A, Dahl M. Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator. In Proceedings of the 2011 International Conference on Fluid Power and Mechatronics (FPM). IEEE Press. 2011. p. 516-521