Rotor blades condition monitoring method based on the elimination of the environment signal

• Autorzy: Lindstedt P. , Rokicki E. , Borowczyk H. , Majewski P.
• Języki publikacji: EN

Abstrakty

EN

The paper presents fundamentals of a new method for monitoring of technical condition demonstrated by blades of rotor machines during operation thereof. The method involves the diagnostic model expressed as a quotient of the amplitude amplification for the diag-nostic signal y(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, 15]. 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 thereof.

Słowa kluczowe

EN

diagnostics of blades; correlation function; power spectral density (PSD) function; amplitude amplification

• Wydawca: Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Prace Naukowe Instytutu Technicznego Wojsk Lotniczych
• Rocznik: 2009
• Tom: nr 25
• Strony: 15--24
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Lindstedt P.

autor

Rokicki E.

autor

Borowczyk H.

autor

Majewski P.

• Air Force Institute of Technology (AFIT)

Bibliografia

• 1. Bovishanskii K.N. et.al.: A method for continously monitoring the vibrational state of the rotating blades of turbo-machines. “Thermal engineering” (Teploenegetika), Vol. 47 No. 5, St. Petersburg.
• 2. Bendat J.S., Piersol A.G.: Metody analizy i pomiaru sygnałów losowych. PWN, War-szawa 1976.
• 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 http://www.paper.edu.cn.
• 4. Flotow A. von, 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 Compres-sor Blades. Proceedings of 1st EVI-GTI International Conference on Gas Turbine In-strumentation, 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 mecha-nicznych. Wyd. Politechniki Białostockiej, Białystok 1994.
• 14. Lindstedt P., Kotowski A.: Basics for innovations in vibroacoustic diagnostics of trans-port machines rotor blades. The Archives of Transport Vd XVI No. 4 2004.
• 15. Lindstedt P.: Application of the Correlation Function and Fourier Transform to Evalua-tion of the Technical Condition Demonstrated by Rotor Blades During the Operation Process. “Journal of KONES” 2009, Vol. 16, No. 2, Warsaw.
• 16. Roberts J.P.: Comparison of Tip Timing with strain ganges for rotor blade vibration measurement. Proceedings of lecture series on Tip Timing an Tip Clearnce Problems in Turbomachines Von Karman Instytute Belgium 2007.
• 17. Szabatin J.: Podstawy teorii sygnałów. 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, 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 en-gine application. 17th International Symposium on Airbreathing Engines, September 4-9 2005 Munich Germany Paper No ISABE – 2005-1220.
• 21. http://www.mtu.de/en/technologies/engineering_news/development/noncontact_blade_vibration.pdf.