JAMMED ON/OFF VALVE FAULT COMPENSATION WITH DISTRIBUTED DIGITAL VALVE SYSTEM

Authors

  • Lauri Siivonen Tuotekehitys Oy Tamlink, Hermiankatu 5, 33720 Tampere, Finland
  • Matti Linjama Tampere University of Technology - Department of Intelligent Hydraulics and Automation, Korkeakoulunkatu 6, 33720 Tampere, Finland
  • Mikko Huova Tampere University of Technology - Department of Intelligent Hydraulics and Automation, Korkeakoulunkatu 6, 33720 Tampere, Finland
  • Matti Vilenius Tampere University of Technology - Department of Intelligent Hydraulics and Automation, Korkeakoulunkatu 6, 33720 Tampere, Finland

Keywords:

digital hydraulics, valve faults, compensation

Abstract

The digital valve system is an on/off valve based directional flow control valve capable of accurate control of hydraulic actuators. The presented system has good features concerning fault tolerance since it can detect, diagnose and compensate faults on-line. This paper concentrates on fault compensation when a valve has jammed in the open – position and the system has internal leakage. The system can adapt to the fault and continue operation with only a small degradation in performance. This feature is unique in the area of hydraulics since the system has no extra components added. The cost for this compensation is increased calculation in the controller and increased energy consumption if a fault occurs. If these downsides can be accepted the system can be considered fault-tolerant and it could be used even in critical applications where failing is not an option. Fault tolerance can also be introduced as standard in every modern hydraulic application where good performance and fault tolerance are needed.

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Author Biographies

Lauri Siivonen, Tuotekehitys Oy Tamlink, Hermiankatu 5, 33720 Tampere, Finland

Lauri Siivonen Researcher at product development company applying digital hydraulics to industrial applications. He has studied digital hydraulics since 2003, graduated as M.Sc in 2004 and has researched fault tolerance since then. His professional interests are fault tolerance and applying systems into industrial applications. He is currently writing his doctoral thesis about digital hydraulics.

Matti Linjama, Tampere University of Technology - Department of Intelligent Hydraulics and Automation, Korkeakoulunkatu 6, 33720 Tampere, Finland

Matti Linjama Senior researcher at Tampere University of technology, Department of Intelligent Hydraulics and Automation, IHA.

Mikko Huova, Tampere University of Technology - Department of Intelligent Hydraulics and Automation, Korkeakoulunkatu 6, 33720 Tampere, Finland

Mikko Huova He graduated as M.Sc at Tampere University of technology in 2008. Work with control algorithms of digital hydraulic systems started before his graduation as a research assistant. He is continuing the study of the subject now as a researcher mainly focusing on the energy saving control of digital hydraulic systems.

Matti Vilenius, Tampere University of Technology - Department of Intelligent Hydraulics and Automation, Korkeakoulunkatu 6, 33720 Tampere, Finland

Matti Vilenius Professor of Fluid Power at Tampere University of Technology, Head of Department of Intelligent Hydraulics and Automation, IHA.

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Published

2009-08-01

How to Cite

Siivonen, L., Linjama, M., Huova, M., & Vilenius, M. (2009). JAMMED ON/OFF VALVE FAULT COMPENSATION WITH DISTRIBUTED DIGITAL VALVE SYSTEM. International Journal of Fluid Power, 10(2), 73–82. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/501

Issue

2009: Vol 10 Iss 2

Section

Original Article