Vibration parameters identification of turbomachinery rotor blades under transient condition using Blade Tip-Timing measurements

Bornassi, S.; Berruti, Teresa Maria; Firrone, Christian Maria; Battiato, Giuseppe

doi:10.1016/j.measurement.2021.109861

Cited by 28 publications

(9 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, while they have high accuracy and well established signal processing algorithms, strain gauges have limited lifetimes in high-temperature conditions, are intrusive, have complicated means of transmitting data from a rotating system and the provided information is limited to instrumented blades [ 4 ]. Unlike vibration, temperature and ultrasound-based techniques [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ], the Blade Tip-Timing (BTT) approach is one of the most advanced and versatile in situ techniques for axial turbomachinery blade dynamics measurements [ 15 , 16 , 17 ]. The principle of the BTT approach is based on the measurement of instantaneous blade tip deflection by detecting delays or advances in the arrival time of the blade tip at fixed angular positions [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Hardware and Triggering Effect in Tip-Timing Measurement Uncertainty

Capponi

Tocci

Marrazzo³

et al. 2023

Sensors

View full text Add to dashboard Cite

Non-destructive testing for structural health monitoring is becoming progressively important for gas turbine manufacturers. As several techniques for diagnostics and condition-based maintenance have been developed over the years, the tip-timing approach is one of the preferred approaches for characterizing the dynamic behavior of turbine blades using non-contact probes. This experimental work investigates the uncertainty of the time-of-arrival of a Blade Tip-Timing measurement system, a fundamental requirement for numerical and aeromechanical modeling validation. The study is applied to both the measurement setup and the data processing procedure of a generic commercial measurement system. The influence of electronic components and signal processing on the tip-timing uncertainty is determined under different operating conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Hardware and Triggering Effect in Tip-Timing Measurement Uncertainty

Capponi

Tocci

Marrazzo³

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…This allows the traditional MUSIC method to overcome spectrum aliasing without expanding the snapshot matrix. Bornassi et al [20] presented a procedure to identify the vibration parameters of rotating blades under this non-stationary condition. Chen et al [21] derived a blind interpolation method for multifrequency BTT signals.…”

Section: Introductionmentioning

confidence: 99%

Parameter identification method of nonuniform and under-sampled blade tip timing based on extended DFT and compressed sensing

Zhang,

Ding

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

Vibration amplitude and frequency are the two most important indicators that characterize the health status of high-speed rotating blades, but the signal obtained by blade tip timing (BTT) technology, one of the best rotating blade vibration monitoring methods, is seriously nonuniform and under-sampled, which makes these two indicators difficult to identify. In view of this problem, the paper proposes a parameter identification method for the nonuniform and under-sampled BTT signal based on extended Discrete Fourier transform (EDFT) and Compressed Sensing (CS), with the Fourier integral transformation as the goal. It realizes the frequency analysis of nonuniform under-sampled signals by constructing and optimizing the transformation basis function instead of the exponential basis in the traditional FFT transformation in the extended frequency range, and then constructs a CS model through the obtained blade vibration frequency. The complete waveform of the blade vibration is restored by using a small number of under-sampled signals, thus obtaining the blade vibration amplitude and vibration frequency. On the one hand, the method proposed in this paper breaks through the limitation of Nyquist's sampling theorem, and the number of analytical spectral lines is no longer limited to the number of sampling points, which improves the frequency resolution. On the other hand, only a small number of measurement signals can be reconstructed to achieve a complete vibration signal. The feasibility and reliability of the proposed method are verified by mathematical modeling, simulation analysis, and experimental testing. The results indicate that when the number of sensors is greater than or equal to four, the time domain and frequency domain signals of blade vibration can be accurately analyzed based on the proposed method, the vibration amplitude error is less than 0.01 mm, the frequency error is less than 0.1 Hz, and it has good anti-interference performance.

show abstract

“…In the United States, the HOOD Corporation [17]. In the Italian, the Politecnico di Torino [18,19]. In France, the Safran Helicopter Engines [20] and Electricite De France [21] have researched on BTT technology.…”

Section: Introductionmentioning

confidence: 99%

Characterization of crack on the outer edge of the disk based on blade tip timing technology

Zhang,

Guo,

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

The structural performance failure of the rotating blade disk with disk crack is one of the major causes of aero-engine failures and even serious accidents. The blade tip timing (BTT) is a non-contact measurement technology that obtains the rotor operation status by detecting the blade. This paper has proposed a crack characterization method for the disk's outer edge based on the BTT technique. In this process, the influence of crack parameters ( length and position ) on the circumferential displacement signal of the blade tip is determined by using the crack tip displacement, the relative position of the blade tip motion during the rotation of the outer edge crack-containing disk and the actual blade tip measuring points, and the critical value of the crack parameters affecting the blade tip offset is analyzed. The finite element simulation results verify the effectiveness and accuracy of the proposed method. The Study of this article can provide a theoretical basis for the measurement of cracks on the disk's outer edge by the BTT technique, which is of great significance for the accurate identification of the operating condition of the rotating blade disk structure.

show abstract

Vibration parameters identification of turbomachinery rotor blades under transient condition using Blade Tip-Timing measurements

Cited by 28 publications

References 23 publications

Experimental Investigation on Hardware and Triggering Effect in Tip-Timing Measurement Uncertainty

Experimental Investigation on Hardware and Triggering Effect in Tip-Timing Measurement Uncertainty

Parameter identification method of nonuniform and under-sampled blade tip timing based on extended DFT and compressed sensing

Characterization of crack on the outer edge of the disk based on blade tip timing technology

Contact Info

Product

Resources

About