Article
Engineering, Mechanical
Zhicheng Xiao, Yiming Meng, Hua Ouyang
Summary: Novel methods have been proposed to enhance the capabilities of a blade tip timing system by simultaneously measuring blade tip clearance and blade tip velocity. These methods utilize convex lenses to adjust the optical path and introduce new protocols and algorithms for data processing, enabling accurate measurements of clearance and velocity under various operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Suiyu Chen, Yongmin Yang, Haifeng Hu, Fengjiao Guan, Guoji Shen, Zifang Bian, Haonan Guo
Summary: The study introduces a novel interpolation method for wideband signal reconstruction (IWSR) to address issues in blade tip timing (BTT) technique for online damage diagnosis. Simulations and experimental results confirm the effectiveness of IWSR in signal reconstruction, noise suppression, and frequency identification.
Article
Engineering, Mechanical
Dusan Maturkanic, Pavel Prochazka, Jan Kozanek, Mohammed Lamine Mekhalfia
Summary: This paper describes ongoing work on a complex system for measuring and calculating turbine blade vibrations. The system uses a precise separation approach to calculate pure blade vibration. The paper introduces the method of calculating pure blade vibration based on an analytical approach and analyzes its reliability and expected accuracy.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Xulong Zhang, Weimin Wang, Kang Chen, Weibo Li, Dengpeng Zhang, Linlin Tian
Summary: This paper discusses the application of Blade Tip Timing (BTT) technology in measuring blade vibrations, and proposes a method for measuring the five-dimensional blade tip movements. By tracking the actual measuring point position through BTT data, this method can accurately measure the blade's axial, lean, bend, untwist, and sweep movements, with simulation results confirming its effectiveness and accuracy.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Acoustics
Zhenfang Fan, Hongkun Li, Jiannan Dong, Xinwei Zhao, Daitong Wei, Qiang Zhou
Summary: This study demonstrates that blade vibration difference can estimate blade vibration and establishes a two-probe blade vibration measurement system. A method for parameter identification of blade vibration based on blade vibration difference is proposed, verifying that blade vibration difference can be measured with high accuracy by the BTT system, with consistent frequency results.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Chemistry, Analytical
Zhonghan Liang, Yuxiang Zhang, Lin Yue
Summary: This study combines the non-contact optical techniques of digital image correlation (DIC) and blade tip-timing (BTT) to achieve a method of investigation for a rotating blade vibration measurement. Results show that this method is an effective non-contact, high-precision full-field deformation measurement method that is worth exploring for structural design and dynamic strain assessment of vibrating components.
Article
Engineering, Mechanical
Wenbo Li, Shaohua Tian, Zhibo Yang, Xingwu Zhang, Xuefeng Chen
Summary: Blade tip timing (BTT) is the most promising method for online turbine blade health monitoring. This study proposes a multi-spectrum fusion (MSF) single-probe BTT signal analysis method that improves the frequency analysis capability and reduces dependence on prior information. Numerical simulations and experiments verify the feasibility and robustness of the MSF and demonstrate the similarity between single-probe BTT and multi-probe BTT in analyzing asynchronous blade vibration.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Computer Science, Information Systems
Zhongsheng Chen, Yemei Xia, Hao Sheng, Jing He
Summary: Blade tip timing (BTT) vibration measurement is a promising method in online blade monitoring, but uncertainties such as variable rotating speeds and static angle errors present challenges. This paper proposes a calibration method using times of arrival (TOAs) in the angular domain, which has shown potential in reducing measurement deviations under variable rotating speeds. Simulation results indicate the effectiveness of the proposed method for practical applications of the BTT method.
Article
Chemistry, Multidisciplinary
Liang Zhang, Qidi Wang, Xin Li
Summary: Blade tip-timing (BTT) is a widely used non-contact measurement method for rotating blade vibration. This paper proposes a blade vibration parameter identification method based on the mapping matching between the static waveform of the sensor and the dynamic waveform of the blade tip-timing. By analyzing the modulation effects of different vibration displacements, velocities, and amplitudes on the sensor waveform, the vibration displacement and velocity of the blade passing through the sensor can be obtained, and then the vibration parameters of the blade can be identified. Compared with the under-sampled time of arrival (TOA) data of classic BTT applications, the sensor waveform output modulated by blade vibration can provide additional data, and the waveform mapping method can not only reduce the number of sensors but also improve the identification accuracy of blade vibration parameters.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Wenbo Li, Shaohua Tian, Zhibo Yang, Guangrong Teng, Xuefeng Chen
Summary: Blade tip timing (BTT) is the most promising online monitoring method for turbine blade health. Existing BTT data analysis methods have limited application scope and slow calculation speed, which hinder their practical industrial application. In this study, a parametric Bayesian model for rotating blade frequency tracking with a single probe is proposed, which has a wider application range, fast computation speed, and minimizes the number of probes used. Numerical simulation and experimental results demonstrate the feasibility, robustness, and advantages of this method in signal amplitude estimation. These findings are significant for online blade health monitoring of turbines.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Shuming Wu, Zengkun Wang, Haoqi Li, Zhibo Yang, Shaohua Tian, Ruqiang Yan, Shibin Wang, Xuefeng Chen
Summary: Cracks are one of the most fatal faults of rotating blades, and the blade tip timing technique can be used to detect cracks early and ensure the safe operation of gas turbines. This article proposes a method of crack detection using BTT data, which can effectively diagnose cracks by studying parameters such as blade frequency, amplitude, and interblade distance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Acoustics
Haonan Guo, Yongmin Yang, Fengjiao Guan, Haifeng Hu, Guoji Shen, Suiyu Chen, Zifang Bian
Summary: This study introduces a method for measuring turbine blade torsional vibration, analyzing and measuring the characteristics of torsional vibration through blade tip timing and compressed sensing theory, and ultimately proposing an optimization method for sensor layout.
SHOCK AND VIBRATION
(2021)
Article
Engineering, Electrical & Electronic
Zhenfang Fan, Hongkun Li, Jiannan Dong, Xinwei Zhao, Hongwei Cao
Summary: This paper introduces the importance of Blade Tip Timing (BIT) technology in estimating blade vibration and diagnosing faults, proposes the SSLF method to overcome the limitations of the OPR method, and verifies the effectiveness of the SSLF method through theoretical analysis and experimental investigations.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Multidisciplinary
Qinglei Zhang, Dong Liu, Jianguo Duan, Jiyun Qin, Ying Zhou
Summary: The identification of rotating blade vibration parameters is crucial for diagnosing blade health. Most current non-contact measurement techniques use tip timing vibration theory, but its practical implementation faces challenges. This study improves calculation accuracy by adjusting the vibration displacement calculation and applying noise filtering techniques. It also increases the precision of asynchronous vibration parameter detection by adopting a synthetic phase difference spectrum correction method.
Article
Engineering, Aerospace
Jiahui Cao, Zhibo Yang, Guangrong Teng, Shaohua Tian, Guoyong Ye, Xuefeng Chen
Summary: This study proposes a method for parameter identification based on single-probe Blade-Tip Timing (BTT) measurement for blade-vibration monitoring. By extending traditional time-frequency analysis methods to a time-sampling frequency, a Sampling-Aliasing Frequency (SAFE) map is projected onto a parameter space using spatial transformation to extract slope and intercept parameters, which can be interpreted as engine order and natural frequency. The effectiveness and robustness of the proposed method are verified through simulations and experiments.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Chemistry, Analytical
Jiajia Jiang, Han Liu, Fajie Duan, Xianquan Wang, Xiao Fu, Chunyue Li, Zhongbo Sun, Xinyuan Dong
Article
Chemistry, Analytical
Xiaoming Lv, Fajie Duan, Jia-jia Jiang, Xiao Fu, Lin Gan
Article
Chemistry, Analytical
Xiaoming Lv, Fajie Duan, Jia-Jia Jiang, Xiao Fu, Lin Gan