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Готові списки джерел за темами / Fault simulation acceleration / Статті в журналах

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Статті в журналах з теми "Fault simulation acceleration"

Автор: Grafiati

Опубліковано: 11 березня 2023

Оновлено: 31 липня 2025

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1

Liu, Xiaoyang, Haizhou Huang, and Jiawei Xiang. "A Personalized Diagnosis Method to Detect Faults in a Bearing Based on Acceleration Sensors and an FEM Simulation Driving Support Vector Machine." Sensors 20, no. 2 (2020): 420. http://dx.doi.org/10.3390/s20020420.

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Classification of faults in mechanical components using machine learning is a hot topic in the field of science and engineering. Generally, every real-world running mechanical system exhibits personalized vibration behaviors that can be measured with acceleration sensors. However, faulty samples of such systems are difficult to obtain. Therefore, machine learning methods, such as support vector machine (SVM), neural network (NNs), etc., fail to obtain agreeable fault detection results through smart sensors. A personalized diagnosis fault method is proposed to activate the smart sensor networks

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2

Li, Jiangyi, Zhengfang Li, and Bengang Zhou. "Impact of Multiple Faults on the Maximum Credible Ground-Motion Parameters of Large Earthquakes at a Near-Field Site." Applied Sciences 14, no. 13 (2024): 5628. http://dx.doi.org/10.3390/app14135628.

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The ground-motion simulation of regional-specific earthquake scenarios is crucial for the seismic design of key facilities. Herein, we considered parameter uncertainty in ground-motion simulations and the impact of multiple faults when determining the maximum credible ground-motion parameters of large earthquakes at a near-field dam. The source models of the Daju–Lijiang, Xiaozhongdian–Daju, and Longpan–Qiaohou faults were established based on geological and geophysical data. Although the method for identifying asperity is not yet mature and still faces many difficulties, it provides an opport

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3

Zhang, Xiaorui, Yi Liu, Changqing Xu, Xinfang Liao, Dongdong Chen, and Yintang Yang. "A Fast Simulation Method for Evaluating the Single-Event Effect in Aerospace Integrated Circuits." Micromachines 14, no. 10 (2023): 1887. http://dx.doi.org/10.3390/mi14101887.

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With the continuous progress in integrated circuit technology, single-event effect (SEE) has become a key factor affecting the reliability of aerospace integrated circuits. Simulating fault injection using the computer simulation technique effectively reflects the SEE in aerospace integrated circuits. Due to various masking effects, only a small number of faults will result in errors; the traditional method of injecting one fault in one workload execution is inefficient. The method of injecting multiple faults in one workload execution will make it impossible to judge which fault results in er

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4

Li, Lingwei, Yuan Yuan, Xinglong Zhang, Songwei Wu, and Tianhong Zhang. "Fault-Tolerant Control Scheme for the Sensor Fault in the Acceleration Process of Variable Cycle Engine." Applied Sciences 12, no. 4 (2022): 2085. http://dx.doi.org/10.3390/app12042085.

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This paper presents a fault-tolerant control scheme for the sensor fault in the acceleration process of the variable cycle engine. Firstly, an adaptive equilibrium manifold model with multiple inputs and multiple outputs is established. Combined with the Kalman filter bank, sensor fault diagnosis is carried out to realize the diagnosis and signal reconstruction of the engine in the case of a single sensor and double sensor faults. On this basis, isolation and group isolation are used to diagnose sensor faults and reconstruct signal in speed closed-loop control. Then, the control plan of the ac

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5

Yin, Zhengyang, Yi Yang, Guoji Shen, Ling Chen, and Niaoqing Hu. "Eight-DOF Dynamic Modeling of EMA Mechanical Transmission and Spalling Fault Characteristic Analysis." Actuators 11, no. 8 (2022): 226. http://dx.doi.org/10.3390/act11080226.

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Electromechanical actuators (EMAs), as the critical actuator system of next-generation aircraft, have attracted the attention of many institutions and enterprises around the world. However, due to harsh working conditions, their reliability cannot satisfy the requirements of widespread application in aircraft. Therefore, in order to conduct fault diagnosis on EMAs, in this paper, we establish a comprehensive dynamic model under numerous assumptions to study the fault characteristics that may occur in the displacement and acceleration responses of EMA systems. First, an eight-DOF dynamic model

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6

Rogers, A. M., and D. M. Perkins. "Monte Carlo simulation of peak-acceleration attenuation using a finite-fault uniform-patch model including isochrone and extremal characteristics." Bulletin of the Seismological Society of America 86, no. 1A (1996): 79–92. http://dx.doi.org/10.1785/bssa08601a0079.

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Abstract A finite-fault statistical model of the earthquake source is used to confirm observed magnitude and distance saturation scaling in a large peak-acceleration data set. This model allows us to determine the form of peak-acceleration attenuation curves without a priori assumptions about their shape or scaling properties. The source is composed of patches having uniform size and statistical properties. The primary source parameters are the patch peak-acceleration distribution mean, the distribution standard deviation, the patch size, and patch-rupture duration. Although our model assumes

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7

Zhang, Hehong, Yunde Xie, and Zhiqiang Long. "Fault Detection Based on Tracking Differentiator Applied on the Suspension System of Maglev Train." Mathematical Problems in Engineering 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/242431.

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A fault detection method based on the optimized tracking differentiator is introduced. It is applied on the acceleration sensor of the suspension system of maglev train. It detects the fault of the acceleration sensor by comparing the acceleration integral signal with the speed signal obtained by the optimized tracking differentiator. This paper optimizes the control variable when the states locate within or beyond the two-step reachable region to improve the performance of the approximate linear discrete tracking differentiator. Fault-tolerant control has been conducted by feedback based on t

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8

Du, Can Yi, and Fei Fei Yu. "Analysis of Engine Camshaft Bearing Loosening Fault Based-on Model Simulation and Vibration Signal." Advanced Materials Research 694-697 (May 2013): 896–900. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.896.

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Virtual technology is used for simulation analysis of engine camshaft bearing-loosening fault. Firstly, dynamic model of engine powertrain and its valve-train is established, and then the model parameters could be set to simulate the camshaft bearing loosening fault, so the vibration acceleration signals on engine cylinder head can be obtained by simulation calculation. Then by analyzing and comparing with the vibration signals in the normal state, camshaft bearing-loosening fault features are extracted. The analytical result based-on model simulation and vibration signal is used to guide the

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9

Liu, Shulian, Ling Zhang, Likang Yang, Cunkai Gu, and Zaihua Wang. "The Identification Method of the Winding Vibration Faults of Dry-Type Transformers." Electronics 12, no. 1 (2022): 3. http://dx.doi.org/10.3390/electronics12010003.

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To identify the four typical faults of dry-type transformer winding insulations, looseness, deformation and eccentricity, this study establishes the electric magnetic force multi-physical field simulation model of a dry-type transformer winding under the four typical faults with COMSOL software, based on the vibration mechanism of an SCB10-1000/10 dry-type transformer. Through the multi-physical field coupling calculation, the comparative relationship between the vibration acceleration of the winding under the four kinds of faults and the normal working state is obtained. The results show that

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10

Song, O. Y., and P. R. Menon. "Acceleration of trace-based fault simulation of combinational circuits." IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems 12, no. 9 (1993): 1413–19. http://dx.doi.org/10.1109/43.240089.

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11

Chen, Jian, Robert Randall, Ningsheng Feng, Bart Peeters, and Herman Van der Auweraer. "Modelling and diagnosis of big-end bearing knock fault in internal combustion engines." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 16 (2014): 2973–84. http://dx.doi.org/10.1177/0954406214524743.

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Big-end bearing knock is considered to be one of the common mechanical faults in internal combustion engines (IC engines). In this paper, a model has been built to simulate the effects of oversized clearance in the big-end bearing of an engine. In order to find a relationship between the acceleration response signal and the oversized clearance, the kinematic/kinetic and lubrication characteristics of the big ending bearing were studied. By adjusting the clearance, the impact forces with different levels of bearing knock fault can be simulated. The acceleration on the surface of the engine bloc

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12

ISUMI, MASANORI, HIROSHI KATSUKURA, and YOUICHI HAGINO. "STUDY ON THE SIMULATION OF ACCELERATION ENVELOPES BY FAULT MODELS." Journal of Structural and Construction Engineering (Transactions of AIJ) 348 (1985): 26–32. http://dx.doi.org/10.3130/aijsx.348.0_26.

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13

Li, Zhaorong, Jiaoying Wang, Diwang Ruan, Jianping Yan, and Clemens Gühmann. "Bearing Digital Twin Based on Response Model and Reinforcement Learning." Lubricants 11, no. 12 (2023): 502. http://dx.doi.org/10.3390/lubricants11120502.

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In recent years, research on bearing fault modeling has witnessed significant advancements. However, the modeling of bearing faults using digital twins (DTs) remains an emerging area of exploration. This paper introduces a bearing digital twin developed by integrating a signal-based response model with reinforcement learning techniques. Initially, a signal-based model is constructed, comprising a unit fault impulse function and a decay oscillation function. This model illustrates the bearing’s acceleration response under fault conditions and acts as the environmental component within the beari

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14

Su, Qingshuang, Yinfeng Dong, Feiyu Guo, and Xingyu Zhang. "Acceleration spikes in strong earthquake ground motion induced by dilatancy cyclic mobility mechanism." Vibroengineering Procedia 52 (November 25, 2023): 60–66. http://dx.doi.org/10.21595/vp.2023.23715.

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Strong motion records with acceleration spikes have occurred frequently in recent major earthquakes, acceleration spikes contribute to the peak ground accelerations (PGAs) and the amplitudes are significantly higher than the predicted values based on present attenuation relation. The generation mechanism of acceleration spikes is revealed based on long-term monitoring after the 2008 Mw 8.0 Wenchuan earthquake. The horizontal accelerogram with obvious spikes from the Mw 9.0 Tohoku-Oki earthquake is reproduced by using numerical simulation, and it’s found that the dilatancy cyclic mobility (DCM)

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15

H. Saffari, A. Roohafzayan, A. Mahdavian, and M. Yari. "Stochastic Finite Fault Modeling and Simulation of Strong Ground Motion of Mosha Fault in Iran." Electronic Journal of Structural Engineering 20 (June 1, 2020): 63–71. http://dx.doi.org/10.56748/ejse.20247.

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This study aims at predicting large earthquakes caused by Mosha fault in Tehran, the capital of Iran with population of more than 13 million people which located alongside active faults. This study uses the EXSIM program to do the finite fault modeling of simulation. Using Geopsy software and programming in MATLAB we evaluated the site effect of 13 station. Using other required parameters of Mosha fault in EXSIM, we gained the artificial strong motions of the stations. Finally, using SeismoSignal and MATLAB software, we depicted the Acceleration -time graph and the semi-logarithm frequency spe

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16

Guo, Junjun, Yitong Gu, Weihong Wu, Shihyu Chu, and Xinzhi Dang. "Seismic Fragility Assessment of Cable-Stayed Bridges Crossing Fault Rupture Zones." Buildings 12, no. 7 (2022): 1045. http://dx.doi.org/10.3390/buildings12071045.

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Current studies lack probabilistic evaluations on the performance of fault-crossing bridges. This paper conducts seismic fragility analyses to evaluate the fragility of cable-stayed bridges with the effects of fault ruptures. Synthetic across-fault ground motions are generated using existing simulation methods for the low-frequency pulses and high-frequency residuals. Incremental dynamic analysis is utilized to generate the seismic responses of the bridge. The optimal intensity measure (IM) for a cable-stayed bridge that crosses a fault is identified based on the coefficient of determination (

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17

Zhong, Ju Fang, Long Wei Zhang, and Jun Wei Liang. "An Improved Source Model for Simulation Near-Field Strong Ground Motion Acceleration Time History." Applied Mechanics and Materials 438-439 (October 2013): 1474–80. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.1474.

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The key to near-field strong ground motion simulation based on stochastic finite fault method is to determine the spectrum of ground motion. We present an improved source spectrum model for simulation near-field strong ground motion acceleration time history. We combine Masudas source spectrum model with scaling factor Hij to keep radiation energy conservation and reflect the energy decrease with frequency at low to mid frequencies. We calculate the Fourier amplitude spectrum Fa, accelerate response spectrum Sa, velocity response spectrum Sv and displacement response spectrum Sd of simulation

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18

Yang, Hongyi, Yanxin Li, and Qinfen Lu. "Performance Simulation of Long-Stator Linear Synchronous Motor for High-Speed Maglev Train under Three-Phase Short-Circuit Fault." World Electric Vehicle Journal 13, no. 11 (2022): 216. http://dx.doi.org/10.3390/wevj13110216.

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The high-speed Maglev train is driven by long-stator linear synchronous motors (LLSM). During the long-time outdoor operation, the insulation material of the armature winding may be damaged, either due to aging or the movement of the windings. This may result in the three-phase short-circuit fault, which affects the traction performance and the operation of the train. In this paper, a simulation model of the high-speed Maglev train traction system with a three-phase short-circuit fault LLSM is established, including the converters at two ends, feeder cables, segmented LLSM and traction control

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19

Zyadat, Zaidan, Nadjim Horri, Mauro Innocente, and Thomas Statheros. "Observer-Based Optimal Control of a Quadplane with Active Wind Disturbance and Actuator Fault Rejection." Sensors 23, no. 4 (2023): 1954. http://dx.doi.org/10.3390/s23041954.

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Hybrid aircraft configurations with combined cruise and vertical flight capabilities are increasingly being considered for unmanned aircraft and urban air mobility missions. To ensure the safety and autonomy of such missions, control challenges including fault tolerance and windy conditions must be addressed. This paper presents an observer-based optimal control approach for the active combined fault and wind disturbance rejection, with application to a quadplane unmanned aerial vehicle. The quadplane model is linearised for the longitudinal plane, vertical takeoff and landing and transition m

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20

Shi, Baoping, Abdolrasool Anooshehpoor, James N. Brune, and Yuehua Zeng. "Dynamics of thrust faulting: 2D lattice model." Bulletin of the Seismological Society of America 88, no. 6 (1998): 1484–94. http://dx.doi.org/10.1785/bssa0880061484.

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Abstract Particle motions in a foam rubber model of shallow-angle thrust faulting show many features different from those commonly assumed in dislocation models of subduction thrusts (Brune, 1996). As a complement to a physical foam rubber experiment, we have carried out dynamic simulation using a 2D lattice numerical model. The model is constructed as a triangular block sliding over a rectangular elastic block. It consists of a 2D set of particles interacting with each other by nonlinear Hooke's forces and obeying Newton's equations of motion. Rough surfaces are introduced on the contact plan

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21

Sun, Yuangang, Zhixiang Tong, Jian Mao, et al. "Research on the Heavy Gas Setting Method of Oil-Immersed Transformer Based on Oil Flow Acceleration Characteristics." Energies 18, no. 14 (2025): 3859. https://doi.org/10.3390/en18143859.

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As the key non-electric protection equipment of an oil-immersed transformer, the gas relay plays an important role in ensuring the safe operation of the transformer. To further enhance the sensitivity of gas relays for the heavy gas alarm, this paper takes the BF type double float gas relay as the research object and proposes a new method for heavy gas setting, which is based on the internal oil flow acceleration characteristics of the gas relay. Firstly, the analytical derivation of the force acting on the gas relay baffle is carried out, and through theoretical analysis, the internal mechani

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22

Inoue, Tomohiro, and Takashi Miyatake. "3D simulation of near-field strong ground motion based on dynamic modeling." Bulletin of the Seismological Society of America 88, no. 6 (1998): 1445–56. http://dx.doi.org/10.1785/bssa0880061445.

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Abstract We simulate the strong ground motion generated from the earthquake rupture process on a shallow strike-slip fault using a 3D finite-difference method. The faulting process is modeled using a crack model with fixed rupture velocity. The variability of peak ground velocity patterns, correlated with fault location and source parameters such as stress drop or rupture velocity, is investigated. Our findings suggest that these patterns are strongly affected by rupture directivity and the uppermost depth of the fault or that of the asperity. When a fault breaks the ground surface, the peak g

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23

Refani, A. N., Yuyun Tajunnisa, K. Yudoprasetyo, F. Ghifari, and D. I. Wahyudi. "Evaluation of Structure Performance under Seismic Load with Non-Liner Time History on High-Rise Building Affected by Kendeng Fault Earthquake Simulation." Key Engineering Materials 879 (March 2021): 232–42. http://dx.doi.org/10.4028/www.scientific.net/kem.879.232.

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Indonesia is a country located in the convergence of small plates and large plates. Furthermore, this causes Indonesia to be high potentially to earthquake hazards. The newest geological research published by Geophysical Research Letter (2016) shows the existence of Fault Kendeng, a fault stretches along 300 km from South Semarang, Central Java, to East Java with a movement of 0,05 millimeter per year [1]. As a result of its research, an evaluation using a non-linear time history analysis for structural buildings is necessary. The objective of this study is to evaluate structural buildings usi

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24

Hung, Truong Ngoc. "Methods for Fault Location in High Voltage Power Transmission Lines: A Comparative Analysis." International Journal of Renewable Energy Development 11, no. 4 (2022): 1134–41. http://dx.doi.org/10.14710/ijred.2022.46501.

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Power transmission system stability can be significantly affected due to faults. The fault location accuracy in the transmission lines can make many benefits such as acceleration of the line restoration, reduction in cost, breakdown time, maintenance, and time searching. The methods based on the impedance, including the simple reactance, Takagi, modified Takagi, and double-end, are very much appreciated for locating the fault in transmission lines and especially by estimating the fault distance. This study proposes a comparative case study between these methods. The theoretical basis and the a

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25

Wang, Shi Ming, Xian Zhu Ai, and Li Na Ma. "Failure Analysis in Hydraulic System of the Polar Expedition Buoy which is Based on Virtual Prototype." Advanced Materials Research 718-720 (July 2013): 1559–63. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.1559.

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Introduced the particulIarity circumstances of polar exploration buoy in contrast to normal buoy., raised the important academic value and practical meaning of the research of failure of the polar ocean observing buoys. This paper is based on ,a pair of gear pieces in hydraulic system of polar buoy, and made the virtual prototype simulation experiment on the fault gear pieces. By comparing of the normal meshing with broken teeth meshing which drew the presence of failures, and then analysis the CM acceleration both in time-domain and frequency-domain of fault gear in different rotating speeds,

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26

Wang, Zhongyao, Zejun Zheng, Dongli Song, and Xiao Xu. "A High-Speed Train Axle Box Bearing Fault Diagnosis Method Based on Dimension Reduction Fusion and the Optimal Bandpass Filtering Demodulation Spectrum of Multi-Dimensional Signals." Machines 12, no. 8 (2024): 571. http://dx.doi.org/10.3390/machines12080571.

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The operating state of axle box bearings is crucial to the safety of high-speed trains, and the vibration acceleration signal is a commonly used bearing-health-state monitoring signal. In order to extract hidden characteristic frequency information from the vibration acceleration signal of axle box bearings for fault diagnosis, a method for extracting the fault characteristic frequency based on principal component analysis (PCA) fusion and the optimal bandpass filtered denoising signal analytic energy operator (AEO) demodulation spectrum is proposed in this paper. PCA is used to measure the di

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27

Song, Jia, Weize Shang, Shaojie Ai, and Kai Zhao. "Model and Data-Driven Combination: A Fault Diagnosis and Localization Method for Unknown Fault Size of Quadrotor UAV Actuator Based on Extended State Observer and Deep Forest." Sensors 22, no. 19 (2022): 7355. http://dx.doi.org/10.3390/s22197355.

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The rotor is an essential actuator of quadrotor UAV, and is prone to failure due to high speed rotation and environmental disturbances. It is difficult to diagnose rotor faults and identify the fault localization simultaneously. In this paper, we propose a fault diagnosis and localization scheme based on the Extended State Observer (ESO) and Deep Forest (DF). This scheme can accurately complete the fault diagnosis and localization for the quadrotor UAV actuator without knowing the fault size by combining the model-based and the data-driven methods. First, we obtain the angular acceleration res

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28

Peng, Shuquan, Yongzhang Liu, Ling Fan, et al. "Dynamic Response of Tunnels with a Rubber-Sand Isolation Layer under Normal Fault Creep-Slip and Subsequent Seismic Shaking: Shaking Table Testing and Numerical Simulation." Applied Sciences 13, no. 11 (2023): 6440. http://dx.doi.org/10.3390/app13116440.

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Tunnels may suffer severe damage when passing through an active fault in high-intensity earthquake zones. The present study aims to investigate the performance of an isolation layer composed of a rubber-sand mixture, an emerging trend in low-cost seismic mitigation studies. Based on the Ngong tunnel in the Nairobi-Malaba Railroad in Kenya, Africa, the effect of the rubber-sand isolation layer on the acceleration and strain of the tunnel lining was investigated through a shaking table test under small normal fault creep-slip and subsequent seismic shaking. The influences of the length of the is

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29

Barbirotta, Marcello, Abdallah Cheikh, Antonio Mastrandrea, et al. "Fault-Tolerant Hardware Acceleration for High-Performance Edge-Computing Nodes." Electronics 12, no. 17 (2023): 3574. http://dx.doi.org/10.3390/electronics12173574.

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High-performance embedded systems with powerful processors, specialized hardware accelerators, and advanced software techniques are all key technologies driving the growth of the IoT. By combining hardware and software techniques, it is possible to increase the overall reliability and safety of these systems by designing embedded architectures that can continue to function correctly in the event of a failure or malfunction. In this work, we fully investigate the integration of a configurable hardware vector acceleration unit in the fault-tolerant RISC-V Klessydra-fT03 soft core, introducing tw

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30

Zhou, Lijian, Tian Xu, Zhaohong Lu, and Dong Zhang. "A Study on the Sloshing Problem of Vertical Storage Tanks under the Action of Near-Fault Earthquakes." Advances in Civil Engineering 2020 (January 22, 2020): 1–10. http://dx.doi.org/10.1155/2020/1097696.

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In this study, through a vibration table test, finite element simulation, and research on the rationality of the wave-height fortification of national storage tank specifications, the sloshing response of vertical storage tanks under the action of near-fault ground motion was analyzed. The test results showed that the sloshing wave height of a vertical storage tank was larger under near-fault or long-period ground motions, and the relationship between the sloshing wave height and the peak acceleration of input ground motions was approximately linear. The numerical simulations of the model tank

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31

Li, Jiangyi, Bengang Zhou, Zhongtai He, Haomin Ji, Lei Wang, and Guodong Bao. "Accessing Near-Field Strong Ground Motions Using a Multi-Scheme Method in the Kalawenguquan Fault, Xinjiang, China." Applied Sciences 14, no. 4 (2024): 1451. http://dx.doi.org/10.3390/app14041451.

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The middle segment of the Kalawenguquan fault has been active since the Holocene, with a maximum credible earthquake magnitude of MS 7.5. We established two source models based on empirical relationships, as well as geological, geomorphological, and seismic characteristics. Taking into account the uncertainties of simulation parameters, we adopted the stochastic finite-fault method to calculate all combinations of a multi-scheme simulation. The effects of different source models, initial rupture points, and site locations on the prediction of ground motion parameters were analyzed. The results

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32

Shao, Ningning, Xiaoqiang Chen, and Ying Wang. "Research on IPSO-RBF transformer fault diagnosis based on Adam optimization." Journal of Physics: Conference Series 2290, no. 1 (2022): 012117. http://dx.doi.org/10.1088/1742-6596/2290/1/012117.

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Abstract As the lifeblood element of the power system, the transformer plays a pivotal role in power transmission and voltage conversion. The fault prediction of the transformer can not only realize the early warning before the fault but also provide theoretical support for the formulation of a transformer maintenance scheme, which can improve the safety and reliability of the power system. In this paper, a new method of transformer fault diagnosis based on dissolved gas in oil is proposed by combining the Adam optimization algorithm based on the classical momentum concept with the PSO algorit

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33

Ikutama, Shinya, Takeshi Kawasato, Yosuke Kawakami, et al. "Source Modeling for Predicting Ground Motions and Permanent Displacements Very Close to the Fault Trace." Journal of Earthquake and Tsunami 12, no. 04 (2018): 1841005. http://dx.doi.org/10.1142/s1793431118410051.

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A conventional “recipe” for strong ground motion prediction has been applied to the seismic fault (deep fault; located within seismogenic layer). In order to perform assessments of strong ground motions and permanent displacements at sites very close to the fault trace, we proposed the method of modeling that takes the entire ruptured fault from the ground surface to the seismic fault into account. Our approach was validated by the simulation of observed records obtained at stations very close to the fault trace of the mainshock of the 2016 Kumamoto Japan, earthquake (Mw7.1). Also, through the

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Wang, Haifei, and Junjie Gong. "Dynamic analysis of coupling misalignment and unbalance coupled faults." Journal of Low Frequency Noise, Vibration and Active Control 38, no. 2 (2019): 363–76. http://dx.doi.org/10.1177/1461348418821582.

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Misalignment is a common fault occurring in the rotor system. However, the response characteristics have not been understood comprehensively, especially the relation between forces or torques and displacements, accelerations, or moments. First, misalignment modeling is investigated in this paper. Two coupled rotor system is modeled by six degrees of freedom. Misalignment effects are considered at coupling location using nodal force vectors and moment vectors. Second, Newmark- β method is used to solve the nonlinear equations. Acceleration, displacement, and force or moment response characteris

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Wang, JiaQing, Han Xiao, Yong Lv, Tao Wang, and Zengbing Xu. "Detrended Fluctuation Analysis and Hough Transform Based Self-Adaptation Double-Scale Feature Extraction of Gear Vibration Signals." Shock and Vibration 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/3409897.

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This paper presents the analysis of the vibration time series of a gear system acquired by piezoelectric acceleration transducer using the detrended fluctuation analysis (DFA). The experimental results show that gear vibration signals behave as double-scale characteristics, which means that the signals exhibit the self-similarity characteristics in two different time scales. For further understanding, the simulation analysis is performed to investigate the reasons for double-scale of gear’s fault vibration signal. According to the analysis results, a DFA double logarithmic plot based feature v

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Park, Gwangmin, Byeongjeom Son, Daehyun Kum, Seonghun Lee, and Sangshin Kwak. "Dynamic Modeling and Simulation for Battery Electric Vehicles under Inverter Fault Conditions." Applied Mechanics and Materials 110-116 (October 2011): 3007–15. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3007.

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This paper presents a dynamic modeling, simulation, and analysis of a Battery Electric Vehicle (BEV) according to vehicle dynamic characteristics. Mathematical model variants for the components of BEVs can be modeled and investigated using the Matlab/Simulink software. In order to compare the dynamic performance of BEVs under inverter fault and normal conditions, the CarSim co-simulation platform is configured with real vehicle calibration data. Using this approach, it was possible to quickly check for dynamic performance issues of an electric vehicle without incurring the time delay and cost.

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Liu, Qingguo, Nuonan Mei, Zheng Wang, Jiahang Sun, and Shanshan Zhou. "Enhanced Transformer Overcurrent Protection via Oil Temperature Acceleration." Energies 17, no. 19 (2024): 4916. http://dx.doi.org/10.3390/en17194916.

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When a transformer is in a long-term heavy load operation state, the oil temperature reaches the alarm temperature; if a slight fault occurs inside the transformer, traditional inverse time current protection and other protections that react to phase current may not operate due to insufficient sensitivity or they may operate for too long. Based on this, this article proposes a new principle of accelerating inverse time overcurrent protection based on transformer oil temperature. The proposed method uses transformer oil temperature to accelerate the action time of traditional inverse-time overc

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Liu, Bo Yan, Wen Hao Shen, and Bao Ping Shi. "Seismic Hazard Assessment of Hengshui Area by the Modified Stochastic Finite Fault Modeling." Applied Mechanics and Materials 744-746 (March 2015): 894–97. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.894.

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In recent years, numerical simulation of strong ground motion has been well developed with the progress of earthquake science, and it has become an important approach to estimate strong ground motion. In this research, we improve the original program of EXSIM and the modified program named MEXSIM to calculate the Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) which is essential for seismic hazard assessment of Hengshui area. Considering the impact of V30(the average shear-velocity down to 30 m) we calculate the impact of two scenario earthquakes from the rupture processes of Hen

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Liu, Hao, Wenyu Yan, Yingbo Chen, Jingyi Feng, and Dexin Li. "Seismic Response Analysis of Hydraulic Tunnels Under the Combined Effects of Fault Dislocation and Non-Uniform Seismic Excitation." Water 16, no. 21 (2024): 3060. http://dx.doi.org/10.3390/w16213060.

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Hydraulic tunnels are prone to pass through faults and high-intensity earthquake areas, which will cause serious damage under fault dislocation and earthquake action. Fault dislocation and seismic excitation are often considered separately in previous studies. For tectonic earthquakes with higher frequency in seismic phenomena, fault dislocation and ground motion are often associated, and fault dislocation is usually the cause of earthquake occurrence, so it is limiting to consider the two separately. Moreover, strong earthquake records show that there will be significant differences in the ma

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Tariq, Muhammad Ahsan, Muhammad Usman, Syed Hassan Farooq, Imran Ullah, and Asad Hanif. "Investigation of the Structural Response of the MRE-Based MDOF Isolated Structure under Historic Near- and Far-Fault Earthquake Loadings." Applied Sciences 11, no. 6 (2021): 2876. http://dx.doi.org/10.3390/app11062876.

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Fixed base structures subjected to earthquake forces are prone to various issues, such as the attraction of greater forces to structure, amplified accelerations to non-structural components, expensive design for better seismic performance, and so forth. Base isolation applied at the foundation of vulnerable structures is a radical bypass from the conventional approaches utilized by structural engineers. However, the practical implementation of passive base isolation is constrained by factors such as large displacements at isolation level, uplifting forces at isolators, and vulnerability to unp

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Meng, Rui, Xin Cai, and Xingwen Guo. "A New Resultant Vibration Acceleration Model of a Planetary Gear Train and Fault Response Analysis." Shock and Vibration 2022 (February 27, 2022): 1–20. http://dx.doi.org/10.1155/2022/5243204.

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A new resultant vibration acceleration model is proposed to reveal its signal characteristics more accurately in the healthy and faulty state. First, an analytical lateral-torsional coupled dynamic model is developed with consideration of time-varying mesh stiffness and damping, static transmission error, and gear backlash. Then, the effect of gear backlash and damping on the system is analyzed, and a numerical velocity signal in the healthy and faulty state is carried out. Considering the effects of transmission paths, the resultant acceleration signal along the vertical direction is construc

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Иншаков, Александр, Aleksandr Inshakov, Иван Курбаков, Ivan Kurbakov, Мария Курбакова, and Mariya Kurbakova. "USING OF ACCELERATION CHARACTERISTICS OF THE ENGINE AND THE TURBOCHARGER FOR SUPERCHARGING SYSTEM DIAGNOSING." Bulletin Samara State Agricultural Academy 2, no. 3 (2017): 34–39. http://dx.doi.org/10.12737/17451.

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The purpose of the research is to identify the peculiarities of interconnection of dynamic characteristics of the turbocharger TKR 6.1 and the engine D-245-35 in the presence of a fault in the pressurization system. In the practice of fault finding in the system of supercharging of automotive engine widely used method of diagnosis, OS-nated steak subs on the measurement of the boost pressure in the nominal modes. In terms of the service companies due to the lack of brake stands to estimate the load mode is often not possible. For acceleration of the turbocharger and engine at the department of

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Lin, Tzu-Kang, Tappiti Chandrasekhara, Zheng-Jia Liu, and Ko-Yi Chen. "Verification of a Stiffness-Variable Control System with Feed-Forward Predictive Earthquake Energy Analysis." Sensors 21, no. 22 (2021): 7764. http://dx.doi.org/10.3390/s21227764.

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Semi-active isolation systems with controllable stiffness have been widely developed in the field of seismic mitigation. Most systems with controllable stiffness perform more robustly and effectively for far-field earthquakes than for near-fault earthquakes. Consequently, a comprehensive system that provides comparable reductions in seismic responses to both near-fault and far-field excitations is required. In this regard, a new algorithm called Feed-Forward Predictive Earthquake Energy Analysis (FPEEA) is proposed to identify the ground motion characteristics of and reduce the structural resp

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Jiang, Hong-Chun, Yu-Ling He, Gui-Ji Tang, and Xing-Hua Yuan. "Electromagnetic Force and Mechanical Response of Turbo-Generator End Winding under Electromechanical Faults." Mathematical Problems in Engineering 2021 (December 23, 2021): 1–19. http://dx.doi.org/10.1155/2021/9064254.

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This paper comparatively studies the electromagnetic force and mechanical response of the end winding before and after 3 kinds of typical electromechanical faults in turbo-generator. The analytical expression of electromagnetic force of end winding is derived under the composite fault of static eccentricity and rotor interturn short circuit. Meanwhile, the three-dimensional transient finite element simulation is carried on, and the frequency composition and amplitude variation characteristics of the radial, axial, and tangential electromagnetic force are analyzed for the end windings under sta

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Luo, Wei Bing, Ji Ming Fan, Ji Lv, Li Ya Zhang, and Cui Cui Wu. "Seismic Response Analysis of the Numerical Simulation Method on Cable-Stayed Bridge Tower which Considers the Rigid Foundation." Advanced Materials Research 875-877 (February 2014): 998–1002. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.998.

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The seismic responses under the action of far-fault and near-fault ground motions of the bridge tower structure of the long-span cable-stayed bridge are numerically discussed by means of the model of the bottom consolidation of the column. The results show that the responses of tower of the cable-stayed bridge correlate well with the properties of the ground motions. The seismic responses of the model have much larger values under the near-fault velocity pulse-like ground motions than those of the counterpart. The frequency of system reduces as the flexibility of structure decreases because of

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Yuan, Jie, Jinting Wang, and Shoubiao Zhu. "Effects of Barriers on Fault Rupture Process and Strong Ground Motion Based on Various Friction Laws." Applied Sciences 10, no. 5 (2020): 1687. http://dx.doi.org/10.3390/app10051687.

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A barrier may induce a supershear rupture on a fault. This paper focuses on two questions: One is whether the existence of a barrier accelerates the propagation speed of a whole fault rupture, and the other is what are the effects of friction laws and strength of a barrier on the rupture propagation process. For these purposes, classical slip-weakening, rate-state, and modified slip-weakening friction laws are employed to simulate the effect of a barrier on the fault rupture process. The simulation results showed that the rupture speed of the fault obviously decreases when the rupture front pr

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JIANG, Feihong, Xiaoxiong LIU, Zhenbao LIU, Yu LI, and Jiaxin CHEN. "A fault tolerant control for iced aircraft based on fixed-time incremental dynamic inversion with FTESO." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 42, no. 6 (2024): 996–1004. https://doi.org/10.1051/jnwpu/20244260996.

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Icing seriously affects the aerodynamic coefficients and flight performance of an aircraft. To address this problem, in this paper a fixed-time incremental nonlinear dynamic inversion(INDI) control method based on a fixed-time dilated state observer(FTESO) is proposed, and a flight controller for a certain type of transport aircraft is designed based on this method, which is used to enhance the flight control capability under icing conditions, and thus improve the flight safety. In this designed controller, the FTESO is used to estimate the disturbance in the angular acceleration signal, which

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Kou, Farong, ChenRuo Chen, Wei Xiao, and Kailun Hu. "Study on Adaptive Sliding Mode Fault-tolerant Control of 1/4 Vehicle Electromagnetic Suspension." Journal of Physics: Conference Series 2528, no. 1 (2023): 012025. http://dx.doi.org/10.1088/1742-6596/2528/1/012025.

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Abstract An adaptive sliding mode fault-tolerant manage approach is proposed to remedy the trouble of actuator acquire failure of the electromagnetic hybrid energetic suspension device and the hassle of automobile manipulate balance degradation induced by using the nonlinear pressure of spring and damper. The failure thing is chosen to symbolize the actuator fault size, and the actuator fault parameter mannequin is established. Combining sliding mode manipulate with adaptive control, an adaptive sliding mode fault-tolerant controller for lively suspension primarily based on an correct mannequi

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Yang, Zeng Zeng, Ji Gang Wu, Bin Qin, and Yao Zhou Li. "ADAMS Dynamics Simulating and Analysis of Vibration Signal for Deep-Groove Ball Bearings." Applied Mechanics and Materials 312 (February 2013): 254–57. http://dx.doi.org/10.4028/www.scientific.net/amm.312.254.

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This paper presents the dynamics-simulation and research of vibration characteristic on deep-groove ball bearing. It introduces an analysis of the vibration frequency in different damage of bearing and spectrum analysis of the fault signal on bearing to draw response on vibration characteristics in bearing, so as to provide a simple method on research of dynamic fault characteristic of bearing. This work shows some kind, characteristics signal and frequency of fault on bearing. The normal model and other two models which have raceway crack in inside track and out ring are set up by using ADAMS

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Bai, Yongliang, Hai Xue, and Jiangtao Chen. "Train Axlebox Bearing Fault Diagnosis Based on MSC–SGMD." Sensors 24, no. 1 (2023): 254. http://dx.doi.org/10.3390/s24010254.

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Train axlebox bearings are subject to harsh service conditions, and the difficulty of diagnosing compound faults has brought greater challenges to the maintenance of high–quality train performance. In this paper, based on the traditional symplectic geometry mode decomposition (SGMD) algorithm, a maximum spectral coherence signal reconstruction algorithm is proposed to extract the intrinsic connection between the SGMD components with the help of the frequency domain coherence idea and reconstruct the key signal components so as to effectively improve the extraction of composite fault features o

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