Quantitative Index and Abnormal Alarm Strategy Using Sensor-Dependent Vibration Data for Blade Crack Identification in Centrifugal Booster Fans

Chen, Jinglong; Sun, Hailiang; Wang, Shuai; He, Zhengjia

doi:10.3390/s16050632

Cited by 5 publications

(2 citation statements)

References 36 publications

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“…Using chaos theory, some researchers have carried out the motor fault diagnosis [27][28]. Moreover, the fault diagnosis based on chaos theory is also applied in some other machines such as hydraulic tube tester [29], solar photovoltaic systems [30], noisy wired networks [31], power capacitor [32], three-level T-type inverter [33], wastewater treatment plant [34], centrifugal booster fans [35]. Because the reported study shows that the blade rubbing fault exhibits significant nonlinear features [36], chaos theory could be used to improve the identification accuracy of this kind of nonlinear fault.…”

Section: Introductionmentioning

confidence: 99%

Rub-impact fault identification of a bladed rotor based on chaotic features

Kou

Yue

Lee

et al. 2023

Preprint

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The bladed rotor is an important part in turbine machines. Timely detection of its blade rubbing fault may avoid serious accidents. This paper developed a rub-impact fault identification approach for the bladed rotor based on chaotic features such as average period, time delay, embedded dimension, and largest Lyapunov exponent. A dynamic analytical model of a rotating variable thickness blade with the rub-impact fault is established. It is verified that the blade rubbing model could obtain the relationship between the chaotic behaviors and the rub-impact fault for a rotating blade. Through the nonlinear characteristic analysis, we could establish that different blade rubbing states have a certain corresponding relationship with the chaotic characteristics, which provides the theoretical basis for the blade rubbing identification using the chaotic features. In particular, a rub-impact fault identification approach based on chaotic features is further studied. And the blade rubbing fault can be easily identified by combining four chaotic features, which is proven by experiments. Comparing with the time domain and frequency domain analysis methods, the proposed approach provides a new way to identify such blade rubbing fault.

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Section: Introductionmentioning

confidence: 99%

Rub-impact fault identification of a bladed rotor based on chaotic features

Kou

Yue

Lee

et al. 2023

Preprint

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“…[31] investigated the effects of cracks on the resonance characteristics. As a continuation of Wang et al's research, Chen et al [32] proposed the quantitative identification method for blade crack faults in the centrifugal impeller based on the historical sensor-dependent vibration data. When calculating the forced response in the numerical simulation parts of their research, the engine order excitation was only applied on the main blades.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Splitter Blades on the Resonance Conditions of Impellers

Liu

Cheng

2019

Applied Sciences

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The conventional resonance conditions are derived based on the conventionally designed impellers without splitter blades. This paper proposes the resonance conditions for impellers under the excitation from the impeller–diffuser interaction with attention paid on the influence of splitter blades. A lumped parameter model is established and the modal analysis is carried out. The blade-based representative modal vector (RMV) is defined. The influence of splitter blades on the impeller’s traits of modes is investigated by analyzing the spatial harmonic contents of the RMV. Then, given the specific form of the diffuser-induced engine order excitation acting on the main and splitter blades, the resonance conditions are derived. Tuned and mistuned cases are provided for a practical impeller. The resonance conditions are verified by harmonic response calculations. The applications of the proposed resonance conditions in resonance identification and hazard evaluation of different excitations are given. The differences between the proposed resonance conditions and the conventional ones are discussed. The research indicates that even the RMV of the tuned impeller contains two harmonic components due to the existence of splitter blades. When the excitation frequency equals the natural frequency of the impeller and the excitation order matches with either harmonic index of the two harmonics, the resonance occurs. The results of case studies show that the harmfulness of various engine orders of excitation can be exactly evaluated by the joint use of the spatial harmonic contents analysis result and the proposed resonance conditions; however, analyzing based on the conventional resonance conditions may lead to the misjudgment of the harmfulness of the excitations.

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A review of the diagnosability of control systems with applications to spacecraft

Wang

et al. 2020

Annual Reviews in Control

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Quantitative Index and Abnormal Alarm Strategy Using Sensor-Dependent Vibration Data for Blade Crack Identification in Centrifugal Booster Fans

Cited by 5 publications

References 36 publications

Rub-impact fault identification of a bladed rotor based on chaotic features

Rub-impact fault identification of a bladed rotor based on chaotic features

Investigation of the Influence of Splitter Blades on the Resonance Conditions of Impellers

A review of the diagnosability of control systems with applications to spacecraft

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