The Experts below are selected from a list of 2367 Experts worldwide ranked by ideXlab platform
Tianyang Wang - One of the best experts on this subject based on the ideXlab platform.
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meshing frequency modulation assisted empirical wavelet transform for fault diagnosis of wind turbine planetary Ring Gear
Renewable Energy, 2019Co-Authors: Yun Kong, Tianyang WangAbstract:Abstract Condition monitoRing and fault diagnosis for wind turbine Gearbox is significant to save operation and maintenance costs. However, strong interferences from high-speed parallel Gears and background noises make fault detection of wind turbine planetary Gearbox challenging. This paper addresses the fault diagnosis for wind turbine planetary Ring Gear, which is intractable for traditional spectral analysis techniques, since the fault characteristic frequency of planetary Ring Gear can be resulted from the revolving planet Gears inducing modulations even in healthy conditions. The main contribution is to establish an adaptive empirical wavelet transform framework for fault-related mode extraction, which incorporates a novel meshing frequency modulation phenomenon to enhance the planetary Gear related vibration components in wind turbine Gearbox. Moreover, an adaptive Fourier spectrum segmentation scheme using iterative backward-forward search algorithm is developed to achieve adaptive empirical wavelet transform for fault-related mode extraction. Finally, fault features are identified from envelope spectrums of the extracted modes. The simulation and experimental results show the effectiveness of the proposed framework for fault diagnosis of wind turbine planetary Ring Gear. Comparative studies prove its superiority to reveal evident fault features and avoid the ambiguity from the planet carrier rotational frequency over ensemble empirical mode decomposition and spectral kurtosis.
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fault diagnosis for wind turbine planetary Ring Gear via a meshing resonance based filteRing algorithm
Isa Transactions, 2017Co-Authors: Tianyang WangAbstract:Identifying the differences between the spectra or envelope spectra of a faulty signal and a healthy baseline signal is an efficient planetary Gearbox local fault detection strategy. However, causes other than local faults can also generate the characteristic frequency of a Ring Gear fault; this may further affect the detection of a local fault. To address this issue, a new filteRing algorithm based on the meshing resonance phenomenon is proposed. In detail, the raw signal is first decomposed into different frequency bands and levels. Then, a new meshing index and an MRgram are constructed to determine which bands belong to the meshing resonance frequency band. Furthermore, an optimal filter band is selected from this MRgram. Finally, the Ring Gear fault can be detected according to the envelope spectrum of the band-pass filteRing result.
Yimin Shao - One of the best experts on this subject based on the ideXlab platform.
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Effect of the radial support stiffness of the Ring Gear on the vibrations for a planetary Gear system
Journal of Low Frequency Noise Vibration and Active Control, 2019Co-Authors: Jing Liu, Yimin ShaoAbstract:Planter Gear system is one of the critical components of various industrial transmission systems. In general, the Ring Gear is elastically fixed with the Gearbox. The Gearbox materials and their as...
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fault feature analysis of planetary Gear system with tooth root crack and flexible Ring Gear rim
Engineering Failure Analysis, 2015Co-Authors: Zaigang Chen, Yimin ShaoAbstract:Abstract Planetary Gear transmission has a wide application in different areas due to its advantages such as compactness, large torque-to-weight ratio, reduced noise and vibrations. However, its dynamic responses are much more complex due to the complicated structures and relative motions, which make it difficult in the fault feature extractions at the view point of fault detection. Better understanding on the dynamic features of a planetary Gear transmission and the corresponding internal excitation sources will benefit the fault feature extractions. In this paper, an analytical model for mesh stiffness calculation is developed based on the potential energy principle and uniformly curved Timoshenko beam theory, which enables exploRing the effects of the tooth root crack fault and the flexible Ring Gear rim on the dynamic responses. Based on the developed model, the frequency spectrum structures of the planetary Gear transmission can be revealed and analyzed theoretically in the presence of tooth crack and flexible Ring Gear. A case study is performed to demonstrate the effectiveness of the developed model, where the tooth root cracks are seeded in a tooth of the sun, planet, and Ring Gears. The simulated results indicate that the complicated modulation phenomenon can be observed where the causes of different frequency components can be revealed. This study is expected to be able to give some theoretical guidance on the identification of vibration sources for planetary Gear transmissions.
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dynamic simulation of planetary Gear set with flexible spur Ring Gear
Journal of Sound and Vibration, 2013Co-Authors: Zaigang Chen, Yimin Shao, D SuAbstract:Abstract Ring Gear is a key element for vibration transmission and noise radiation in the planetary Gear system which has been widely employed in different areas, such as wind turbine transmissions. Its flexibility has a great influence on the mesh stiffness of internal Gear pair and the dynamic response of the planetary Gear system, especially for the thin Ring cases. In this paper, the flexibility of the internal Ring Gear is considered based on the uniformly curved Timoshenko beam theory. The Ring deformation is coupled into the mesh stiffness model, which enables the investigation on the effects of the Ring flexibility on the mesh stiffness and the dynamic responses of the planetary Gear. A method about how to synthesize the total mesh stiffness of the internal Gear pairs in multi-tooth region together with the Ring deformation and the tooth errors is proposed. Numerical results demonstrate that the Ring thickness has a great impact on the shape and magnitude of the mesh stiffness of the internal Gear pair. It is noted that the dynamic responses of the planetary Gear set with equally spaced supports for the Ring Gear are modulated due to the cyclic variation of the mesh stiffness resulted from the presence of the supports, which adds more complexity in the frequency structure.
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dynamic simulation of planetary Gear with tooth root crack in Ring Gear
Engineering Failure Analysis, 2013Co-Authors: Zaigang Chen, Yimin ShaoAbstract:Abstract Planetary Gear is widely used in different areas due to its advantages such as compactness, large torque-to-weight ratio, large transmission ratios, reduced noise and vibrations. However, the tooth faults like cracks are seldom concentrated. In this paper, a mesh stiffness model of internal Gear pair with a tooth root crack in the Ring Gear is derived based on the potential energy principle. The mesh stiffness model is incorporated into the dynamic model of a one-stage planetary Gear set with 21-degree-of-freedom (DOF) to investigate the effect of the internal Gear tooth root crack. The crack cases with different dimensions are designed in this paper to demonstrate their influences on the mesh stiffness and the dynamic performance of the planetary Gear set. The simulated results show that bigger reduction in mesh stiffness is caused by the growth in the crack size. And the impulsive vibrations and sidebands can be observed in the dynamic response of the planetary Gear set in time and frequency domains, respectively. Both their amplitudes increase as the crack propagation which supply the possibility for them to be the indicators in the condition monitoRing and fault diagnosis of planetary Gear system.
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Mesh stiffness of an internal spur Gear pair with Ring Gear rim deformation
Mechanism and Machine Theory, 2013Co-Authors: Zaigang Chen, Yimin ShaoAbstract:Planetary Gear has a broad application in industry due to its advantages. However, most of the mesh stiffness calculation for the planetary Gears is based on the assumption that the effect of the Ring flexibility is ignored. In this paper, the Ring deformation based on the uniformly distributed Timoshenko beam theory is coupled into the Gear mesh stiffness model of the internal Gear pair. Based on this model, the effect of the Ring deformation on the internal Gear mesh stiffness can be carried on. In this paper, the effect of the support type (fixed support and pin support), Ring thickness and number of supports on the mesh stiffness are investigated. It is demonstrated that the Ring thickness and the number of supports have a great impact on the mesh stiffness of the internal Gear pair while the influence of the support type is little. In addition, the mesh stiffness appears to be periodic with the number of the periodicities exactly equal to the number of the supports.
Zaigang Chen - One of the best experts on this subject based on the ideXlab platform.
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fault feature analysis of planetary Gear system with tooth root crack and flexible Ring Gear rim
Engineering Failure Analysis, 2015Co-Authors: Zaigang Chen, Yimin ShaoAbstract:Abstract Planetary Gear transmission has a wide application in different areas due to its advantages such as compactness, large torque-to-weight ratio, reduced noise and vibrations. However, its dynamic responses are much more complex due to the complicated structures and relative motions, which make it difficult in the fault feature extractions at the view point of fault detection. Better understanding on the dynamic features of a planetary Gear transmission and the corresponding internal excitation sources will benefit the fault feature extractions. In this paper, an analytical model for mesh stiffness calculation is developed based on the potential energy principle and uniformly curved Timoshenko beam theory, which enables exploRing the effects of the tooth root crack fault and the flexible Ring Gear rim on the dynamic responses. Based on the developed model, the frequency spectrum structures of the planetary Gear transmission can be revealed and analyzed theoretically in the presence of tooth crack and flexible Ring Gear. A case study is performed to demonstrate the effectiveness of the developed model, where the tooth root cracks are seeded in a tooth of the sun, planet, and Ring Gears. The simulated results indicate that the complicated modulation phenomenon can be observed where the causes of different frequency components can be revealed. This study is expected to be able to give some theoretical guidance on the identification of vibration sources for planetary Gear transmissions.
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dynamic simulation of planetary Gear set with flexible spur Ring Gear
Journal of Sound and Vibration, 2013Co-Authors: Zaigang Chen, Yimin Shao, D SuAbstract:Abstract Ring Gear is a key element for vibration transmission and noise radiation in the planetary Gear system which has been widely employed in different areas, such as wind turbine transmissions. Its flexibility has a great influence on the mesh stiffness of internal Gear pair and the dynamic response of the planetary Gear system, especially for the thin Ring cases. In this paper, the flexibility of the internal Ring Gear is considered based on the uniformly curved Timoshenko beam theory. The Ring deformation is coupled into the mesh stiffness model, which enables the investigation on the effects of the Ring flexibility on the mesh stiffness and the dynamic responses of the planetary Gear. A method about how to synthesize the total mesh stiffness of the internal Gear pairs in multi-tooth region together with the Ring deformation and the tooth errors is proposed. Numerical results demonstrate that the Ring thickness has a great impact on the shape and magnitude of the mesh stiffness of the internal Gear pair. It is noted that the dynamic responses of the planetary Gear set with equally spaced supports for the Ring Gear are modulated due to the cyclic variation of the mesh stiffness resulted from the presence of the supports, which adds more complexity in the frequency structure.
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dynamic simulation of planetary Gear with tooth root crack in Ring Gear
Engineering Failure Analysis, 2013Co-Authors: Zaigang Chen, Yimin ShaoAbstract:Abstract Planetary Gear is widely used in different areas due to its advantages such as compactness, large torque-to-weight ratio, large transmission ratios, reduced noise and vibrations. However, the tooth faults like cracks are seldom concentrated. In this paper, a mesh stiffness model of internal Gear pair with a tooth root crack in the Ring Gear is derived based on the potential energy principle. The mesh stiffness model is incorporated into the dynamic model of a one-stage planetary Gear set with 21-degree-of-freedom (DOF) to investigate the effect of the internal Gear tooth root crack. The crack cases with different dimensions are designed in this paper to demonstrate their influences on the mesh stiffness and the dynamic performance of the planetary Gear set. The simulated results show that bigger reduction in mesh stiffness is caused by the growth in the crack size. And the impulsive vibrations and sidebands can be observed in the dynamic response of the planetary Gear set in time and frequency domains, respectively. Both their amplitudes increase as the crack propagation which supply the possibility for them to be the indicators in the condition monitoRing and fault diagnosis of planetary Gear system.
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Mesh stiffness of an internal spur Gear pair with Ring Gear rim deformation
Mechanism and Machine Theory, 2013Co-Authors: Zaigang Chen, Yimin ShaoAbstract:Planetary Gear has a broad application in industry due to its advantages. However, most of the mesh stiffness calculation for the planetary Gears is based on the assumption that the effect of the Ring flexibility is ignored. In this paper, the Ring deformation based on the uniformly distributed Timoshenko beam theory is coupled into the Gear mesh stiffness model of the internal Gear pair. Based on this model, the effect of the Ring deformation on the internal Gear mesh stiffness can be carried on. In this paper, the effect of the support type (fixed support and pin support), Ring thickness and number of supports on the mesh stiffness are investigated. It is demonstrated that the Ring thickness and the number of supports have a great impact on the mesh stiffness of the internal Gear pair while the influence of the support type is little. In addition, the mesh stiffness appears to be periodic with the number of the periodicities exactly equal to the number of the supports.
Xiaodong Zhang - One of the best experts on this subject based on the ideXlab platform.
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fbg strain signal collection and its fault feature analysis for Ring Gear crack of planetary transmission in wind turbine
AOPC 2019: Optical Fiber Sensors and Communication, 2019Co-Authors: Antonio Marcal, Xiaodong Zhang, Hang NiuAbstract:Regardless of many researches done in recent years, most wind turbines are still unable to reach their design lifetime [5]. Failures in the Gearbox, especially in the planetary stage, have been a major cause of reliability problems in the modern wind energy turbine system. The following paper proposes a fault diagnosis method based on the strain signal of the Ring Gear. First, the strain signal is collected from the side of the Ring Gear using FBG sensors in normal condition and faulty condition. Then the collected strain signal is processed and analyzed. In the time-domain analysis, traditional statistical indicators like Peak to Peak, Kurtosis, Crest factor and Peak value are adopted. The analysis results show the effectiveness of the proposed method for identifying tooth crack fault of the Ring Gear.
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an approach for the dynamic measurement of Ring Gear strains of planetary Gearboxes using fiber bragg gratings
Sensors, 2017Co-Authors: Xiaodong ZhangAbstract:The strain of the Ring Gear can reflect the dynamic characteristics of planetary Gearboxes directly, which makes it an ideal signal to monitor the health condition of the Gearbox. To overcome the disadvantages of traditional methods, a new approach for the dynamic measurement of Ring Gear strains using fiber Bragg gratings (FBGs) is proposed in this paper. Firstly, the installation of FBGs is determined according to the analysis for the strain distribution of the Ring Gear. Secondly, the parameters of the FBG are determined in consideration of the accuracy and sensitivity of the measurement as well as the size of the Ring Gear. The strain measured by the FBG is then simulated under non-uniform strain field conditions. Thirdly, a dynamic measurement system is built and tested. Finally, the strains of the Ring Gear are measured in a planetary Gearbox under normal and faulty conditions. The experimental results showed good agreement with the theoretical results in values, trends, and the fault features can be seen from the time domain of the measured strain signal, which proves that the proposed method is feasible for the measurement of the Ring Gear strains of planetary Gearboxes.
Yun Kong - One of the best experts on this subject based on the ideXlab platform.
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meshing frequency modulation assisted empirical wavelet transform for fault diagnosis of wind turbine planetary Ring Gear
Renewable Energy, 2019Co-Authors: Yun Kong, Tianyang WangAbstract:Abstract Condition monitoRing and fault diagnosis for wind turbine Gearbox is significant to save operation and maintenance costs. However, strong interferences from high-speed parallel Gears and background noises make fault detection of wind turbine planetary Gearbox challenging. This paper addresses the fault diagnosis for wind turbine planetary Ring Gear, which is intractable for traditional spectral analysis techniques, since the fault characteristic frequency of planetary Ring Gear can be resulted from the revolving planet Gears inducing modulations even in healthy conditions. The main contribution is to establish an adaptive empirical wavelet transform framework for fault-related mode extraction, which incorporates a novel meshing frequency modulation phenomenon to enhance the planetary Gear related vibration components in wind turbine Gearbox. Moreover, an adaptive Fourier spectrum segmentation scheme using iterative backward-forward search algorithm is developed to achieve adaptive empirical wavelet transform for fault-related mode extraction. Finally, fault features are identified from envelope spectrums of the extracted modes. The simulation and experimental results show the effectiveness of the proposed framework for fault diagnosis of wind turbine planetary Ring Gear. Comparative studies prove its superiority to reveal evident fault features and avoid the ambiguity from the planet carrier rotational frequency over ensemble empirical mode decomposition and spectral kurtosis.
