Analysis of a Signal Preprocessing Method for Blade Tip-Timing without the Once-per Revolution Sensor

DOI

10.2991/eame-17.2017.23How to use a DOI?

Keywords

blade vibration measurement; blade tip-timing; once-per revolution

Abstract

Blade tip-timing is an effective method for blade vibration online measurement of turbomachinery. The majority of tip-timing systems require a once-per revolution (OPR) sensor installed close to the shaft to generate timing reference. In this article a tip-timing signal preprocessing method which requires no OPR sensor is analyzed. The method presented uses only tip-timing signal to obtain the vibration information of the blade and the rotating speed of the rotor. Error analysis indicates the method is less sensitive to the bend and torsional vibration of the shaft and the rotating speed measurement error can be limited. The measurement error of vibration displacement difference is analyzed and compared with the method which requires the OPR sensor. Experiments are conducted and the results indicate that the method is feasible for BTT signal preprocess without the OPR sensor and has good accuracy.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jilong Zhang
AU  - Fajie Duan
AU  - Jiajia Jiang
PY  - 2017/04
DA  - 2017/04
TI  - Analysis of a Signal Preprocessing Method for Blade Tip-Timing without the Once-per Revolution Sensor
BT  - Proceedings of the 2017 2nd International Conference on Electrical, Automation and Mechanical Engineering (EAME 2017)
PB  - Atlantis Press
SP  - 94
EP  - 98
SN  - 2352-5401
UR  - https://doi.org/10.2991/eame-17.2017.23
DO  - 10.2991/eame-17.2017.23
ID  - Zhang2017/04
ER  -