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Method for estimating the static friction degree in the slide pair of the miniaturised electrohydraulic servomechanism

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EN
Abstrakty
EN
One of the most important parameters specifying the usability of the miniaturised electrohydraulic servomechanism includes a static friction degree in its slide pairs, i.e. resistance of the slider’s movement from rest after some time of its staying at rest under pressure. Therefore, at the stage of designing and construction of the electrohydraulic servomechanism, it is important to determine the greatest static friction degree, which may arise in the slider hydraulic pair of this device during its operation. The objective of this article is to present a method for estimating the maximum static friction values in the slide pair based on the extreme value theory. The operation and loading conditions of the slide pair of the electrohydraulic servomechanism for the unmanned aircraft control system were described. The procedure for estimating the maximum static friction degree in the slide pair with the use of the extreme and probabilistic grid was presented. The extreme and probabilistic grid structure was based on the Gumbel probability graph. The graphic presentation of results of the static friction experimental studies in the slide pair on the extreme and probabilistic grid was discussed. By using the graphics method, the empirical dependence of the static friction force in the slide pair on the working fluid pressure in the hydraulic drive (loading conditions) was determined. A practical example of estimating the maximum values of the static friction force that may occur in the slider hydraulic pair of the miniaturized electrohydraulic servomechanism is shown.
Twórcy
  • Air Force Institute of Technology Ksiecia Boleslawa Street 6, 01-494 Warsaw, Poland tel.: +48261851310, fax: +48261851410 , leszek.ulanowicz@itwl.pl
autor
  • Polish Air Force Academy, Department of Aviation Dywizjonu 303 Street 35, 08-521 Deblin, Poland tel.:+48 261 517 423, fax: +48 261 517 421 , andrzej.zyluk@wsosp.pl
Bibliografia
  • [1] Lindorf, R., Wołkow, J., Microtransducers in flud systems, Hydraulics and Pneumatics, 2001.
  • [2] Fitach, E. C, An Encyklopedia of Fluid Contamination Control for Hydraulic Systems, Hemisphere, Washington 1979.
  • [3] Gumbel, E. J., Statistics of extremes, New York 1958.
  • [4] Hao-Wei Wang, Ke-Nan Teng, Residual life prediction for highly reliable products with prior accelerated degradation data, Maintenance and Reliability, Vol. 18(3), pp. 379-389, 2016.
  • [5] Hryniewicz, O., Kaczmarek, K., Nowak, P., Bayes statistical decisions with random fuzzy data – an application for the Weibull distribution, Maintenance and Reliability, Vol. 17(4), pp. 610-616, 2015.
  • [6] Kollek, W. et all., Fundamentals of design, modelling, operation of elements and microdraulic systems, Publishing House of Wroclaw University of Technology, Wroclaw 2011.
  • [7] Klarecki, K., Hetmańczyk, M. P., Rabsztyn, D., Influence of the selected settings of the controller on the behavior of the hydraulic servo drive. Mechatronics – Ideas for Industrial Application, Advances in Intelligent Systems and Computing, Vol. 317, pp. 91-100, 2015.
  • [8] Osiecki, A., Hydrostatic drive of macines, Scientific and Technical Publishers, Warsaw 2004.
  • [9] Ohtsu, I., Yasuda, Y., Gotom, H., Wear and tribological test equipment hydraulic components, Journal of Hydraulic Research, Vol. 39 (2), pp. 203-209, 2001.
  • [10] Ułanowicz, L., Study of destructive processes in aircraft hydraulic drive systems in terms of their durability, Publishing and Printing House of Air Force Institute of Technology, Warsaw 2013.
  • [11] Yuan, Q., Li, P.Y., Using Steady Flow Force for Unstable Valve Design: Modeling and Experiments, ASME Journal of Dynamic Systems, Measurement and Control, Vol. 127 (3), pp. 451-462, 2005.
Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-05c0a6c8-d486-4256-bc4c-f14413a26db6
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