High-Precision Extraction Method for Blade Tip-Timing Signal with Eddy Current Sensor

Joint Authors

Chen, Guang
Zhang, Ji-wang
Ding, Ke-qin

Source

International Journal of Rotating Machinery

Issue

Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2020-11-16

Country of Publication

Egypt

No. of Pages

13

Main Subjects

Mechanical Engineering

Abstract EN

Online monitoring of high-speed rotating blades has always been a hot topic.

Of the various methods, the blade tip timing (BTT) technique, based on eddy current sensors, is considered to be the most promising.

However, BTT signals are easily influenced by various factors, which means that the accurate extraction of BTT signals remains a challenge.

To try to solve this problem, the causes of measurement error were analyzed.

The three main reasons for the error were established: the variation in blade tip clearance, the interference of background noise, and the asymmetry of the blade tip shape.

Further, pertinent improvement methods were proposed, and a compensation method was proposed for the errors caused by the variation of tip clearance.

A new denoising and shaping algorithm based on ensemble empirical mode decomposition (EEMD) was introduced for the errors caused by background noise.

Additionally, an optimal installation position of the sensor was also proposed for the errors caused by the asymmetry of the blade tip shape.

Finally, simulations and experiments were used to demonstrate the improved methodology.

The results show that the measurement error on vibration amplitude and vibration frequency using the proposed method is less than 2.89% and 0.17%, respectively, which is much lower than the traditional method (24.44% and 0.39%, respectively).

American Psychological Association (APA)

Zhang, Ji-wang& Ding, Ke-qin& Chen, Guang. 2020. High-Precision Extraction Method for Blade Tip-Timing Signal with Eddy Current Sensor. International Journal of Rotating Machinery،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1174053

Modern Language Association (MLA)

Chen, Guang…[et al.]. High-Precision Extraction Method for Blade Tip-Timing Signal with Eddy Current Sensor. International Journal of Rotating Machinery No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1174053

American Medical Association (AMA)

Zhang, Ji-wang& Ding, Ke-qin& Chen, Guang. High-Precision Extraction Method for Blade Tip-Timing Signal with Eddy Current Sensor. International Journal of Rotating Machinery. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1174053

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1174053