Results 241 to 250 of about 15,748 (277)

Blade tip timing for multi-mode identification based on the blade vibration velocity

Mechanical Systems and Signal Processing
Baijie Qiao, Xuefeng Chen
exaly   +2 more sources

A Hybrid Fault Diagnosis Approach for Blade Crack Detection using Blade Tip Timing

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020
The harsh working environment of the compressor hinders the condition monitoring of rotating blades. Blade faults are mostly induced by foreign object damage or high cycle failure due to initial defects. Detecting these failures before blades being broken will not only ensure engine safety but largely reduce repair costs.
Shuming Wu, Zengkun Wang, Haoqi Li, Zhibo Yang 0001, Shaohua Tian, Ruqiang Yan 0001, Shibin Wang, Xuefeng Chen 0002   +7 more
openaire   +1 more source

Blade tip timing (BTT) uncertainties

AIP Conference Proceedings, 2016
Blade Tip Timing (BTT) is an alternative technique for characterising blade vibration in which non-contact timing probes (e.g. capacitance or optical probes), typically mounted on the engine casing (figure 1), and are used to measure the time at which a blade passes each probe.
openaire   +1 more source

Analysis of blade vibration frequencies from blade tip timing data

SPIE Proceedings, 2010
Blade tip timing is a non-intrusive technique used for detection, measurement and analysis of blade vibration in rotating blade assemblies. The main recent focus in the application of blade tip timing system has been the determination of blade vibration frequencies.
Menglin Li, Fajie Duan, Tao Ouyang
openaire   +1 more source

Experimental Investigation of the Blade Tip Timing (BTT) Uncertainties [PDF]

, 2022
The uncertainties of blade tip displacement measurement using BTT are investigated through experiments. A novel test bench is established where the blade deformation can be measured simultaneously by laser displacement sensors and BTT, which enables the determination of the BTT measurement error.
Xiao, Zhicheng, Meng, Yiming, Ouyang, Hua   +2 more
openaire   +1 more source

Blade Tip Timing: from Raw Data to Parameters Identification

2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2019
Blade Tip Timing (BTT) methods have been increasingly implemented for blade health monitoring. However, most of them are based on the prior knowledge that the resonance’s location is known. Since real BTT test usually takes more than ten hours, it’s unrealistic to Figure out every resonance from the measured raw data manually.
Shuming Wu, Xuefeng Chen 0002, Pete Russhard, Ruqiang Yan 0001, Shaohua Tian, Shibin Wang, Zhibin Zhao 0002   +6 more
openaire   +1 more source

On the development of a magnetoresistive sensor for blade tip timing and blade tip clearance measurement systems

AIP Conference Proceedings, 2014
A simultaneous blade tip timing (BTT) and blade tip clearance (BTC) measurement system enables the determination of turbomachinery blade vibrations and ensures the monitoring of the existing running gaps between the blade tip and the casing. This contactless instrumentation presents several advantages compared to the well-known telemetry system with ...
R. Tomassini, G. Rossi, J.-F. Brouckaert
openaire   +2 more sources

Blade-Tip Timing Measurement Of Synchronous Vibrations Of Rotating Bladed

2002
Blade-tip timing (BTT) is a promising method for the detection, measurement and analysis of blade vibrations in rotating bladed assemblies. However, the intricacies of the method when applied to real rotating structures undergoing synchronous (Engine Ordered) vibrations are not yet fully understood.
Dimitriadis, Grigorios, Carrington, Ian B., Wright, Jan Robert, Cooper, Jonathan E   +3 more
openaire   +1 more source

Calibration of blade tip-timing sensor for shrouded 40″ last stage blade

Mechanical Systems and Signal Processing, 2018
Abstract Today’s power generation market requests steam turbines of high efficiency, reliability and wide operation range. The last stage moving blades are designed with integral shroud, mid-span, and fir-tree dovetail. The blades are continuously coupled by the blade untwist due to the centrifugal force, and thus the vibration control and increased ...
Kubín, Z., Mísek, T., Hlous, J., Dadaková, T., Kellner, J., Bachorec, T.   +5 more
openaire   +1 more source

Rotating blade frequency identification by single-probe blade tip timing

Mechanical Systems and Signal Processing, 2022
Jia-Hui Cao, Zhi-Bo Yang, Hao-Qi Li, Guang-Rong Teng, Shao-Hua Tian, Wen-Bo Li, Xue-Feng Chen   +6 more
openaire   +1 more source