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Application of the correlation function and Fourier transformation to evaluation of technical condition demonstrated by blades of a rotor machine during the operation process

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EN
The paper presents fundamentals of a new method for monitoring of technical condition demonstrated by blades of rotor machines during operation there of. The method involves the diagnostic model expressed as a qutient of the amplitude amplification for the diagnostic signaly (t) that results from the blade impact and the signal x(t) produced by the blade surrounding when the blade tip approaches the sensor, divided by the amplitude amplification of these signals when the blade tip has already passed the sensor position and moves away. The adopted diagnostic model takes account for current surrounding of the blade x(t) with no need of measurements of its parameters [12, 14]. Thus, the model is sensitive to alterations of the technical condition demonstrated by the blade but very little vulnerable to variations in the blade surroundings. Consequently, the proposed method may be able to play an important role for diagnostics of rotor blades during operation there of. The presented method applicable to monitoring of changes in technical condition of a blade is an innovative approach to carry out diagnostic of the blade in its natural environment with no need to measure signals from that environment.
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  • Air Force Institute of Technology (AFIT) Księcia Boleslawa Street 6, 01-494 Warsaw, Poland tel: +48 22 685-20-01, fax: +48 22 836-44-71, pawel.lindstedt@itwl.pl
Bibliografia
  • [1] Bovishanskii, K. N. et. al., A method for continuous monitoring the vibrational state of the rotating blades of turbomachines, Thermal engineering (Teploenegetika), Vol. 47, No. 5, St. Petersburg 2000.
  • [2] Bendat, J. S., Piersol, A. G., Metody analizy i pomiaru sygnałów losowych. (Methods for analysis and measurements of random signals) PWN, Warszawa 1976 (in Polish).
  • [3] Duan, F., Fang, Z., Sun, Y., Ye, S., Real–time vibration measurement technique based on tip - timing for rotating blades. Opto-Electronic Energineering 2005, 30 (1) 29-31, htt://www.paper.edu.cn
  • [4] von Flotow, A., Mercadal, H., Turbine rotor health management with blade-tip sensors; From Laboratory Tool To Fielded System, www hoodtech tlood River or USD 2000.
  • [5] High Cycle Fatigue S & program 1997 Annual Report http://stimet.dtic.mil
  • [6] High Cycle Fatigue S & program 1998 Annual Report http://stimet.dtic.mil
  • [7] High Cycle Fatigue S & program 1999 Annual Report http://stimet.dtic.mil
  • [8] High Cycle Fatigue S & program 2000 Annual Report http://stimet.dtic.mil
  • [9] High Cycle Fatigue S & program 2001 Annual Report http://stimet.dtic.mil
  • [10] High Cycle Fatigue S & program 2002 Annual Report http://stimet.dtic.mil
  • [11] Klein, B., Non-Contact Vibration measurements Turbocharges Turbine and Compressor Blades, Proceedings of 1st EVI-GTI International Conference on Gas Turbine Instrumentation, Barcelona 2004.
  • [12] Kotowski, A., Lindstedt, P., The using of signals of impulse acoustic response in tests of rotor blades in stationary conditions, The International Symposium on Stability Control of Rotating Machinery, ISCORMA 4, Calgary Alberta Canada 2007.
  • [13] Kurowski, W., Podstawy teoretyczne komputerowego miernictwa systemów mechanicznych, (Theoretical fundamentals for computer-aided measurement techniques in mechanical systems), Wyd. Politechniki Białostockiej, Białystok 1994.
  • [14] Lindstedt, P., Kotowski, A., Basics for innovations in vibroacoustic diagnostics of transport machines rotor blades, The Archives of Transport, Vd XVI, No. 4, 2004.
  • [15] Lindstedt, P., Praktyczna diagnostyka maszyn i jej teoretyczne podstawy, (Practical diagnostics of machinery and its theoretical fundamentals), Wyd. Naukowe ASKON, Warszawa 2002.
  • [16] Roberts, J. P., Comparison of Tip Timing with strain gauges for rotor blade vibration measurement. Proceedings of lecture series on Tip Timing an Tip Clearance Problems in Turbomachines Von Karman Institute, Belgium 2007.
  • [17] Szabatin, J., Podstawy teorii sygnałów (Basics for signal theory), WKŁ Warszawa 2000.
  • [18] Szczepanik, R., Przysowa, R., Wykonanie badań i pomiarów drgań łopatek metodą bezstykową w odwirowni ALSTOM Power w Elblągu, Sprawozdanie ITWL Nr 36/3/2004, (Execution of tests and measurements of blade vibrations by means of a contactless methods on the rotation bench of ALSTOM Power in Elbląg. Report of AFIT No 36/3/2004), Warszawa 2004
  • [19] Washburn, R. S., A State of The Art PC based NSMS Analysis Software Package.http://www.agilismeasurementsystems.com
  • [20] Zieliński, M., Ziller, G., Non-contact Blade Vibration measurement system for aero engine application, 17th International Symposium on Airbreathing Engines, No. ISABE - 2005-1220,http://www.mtn.de/channel/files/pdf noncontact blade vibration pdf, Munich Germany 2005.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ5-0032-0039
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