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Journal articles on the topic 'Gear-train backlash'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Sommer, Andrew, Jim Meagher, and Xi Wu. "Gear Defect Modeling of a Multiple-Stage Gear Train." Modelling and Simulation in Engineering 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/754257.

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This study demonstrates the transient and steady state dynamic loading on teeth within a two-stage gear transmission arising from backlash and geometric manufacturing errors by utilizing a nonlinear multibody dynamics software model. Backlash between gear teeth which is essential to provide better lubrication on tooth surfaces and to eliminate interference is included as a defect and a necessary part of transmission design. Torsional vibration is shown to cause teeth separation and double-sided impacts in unloaded and lightly loaded gearing drives. Vibration and impact force distinctions betwe

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2

Hsu, Y.-L., and S.-G. Wang. "Minimizing angular backlash of a multistage gear train." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 4 (2002): 565–69. http://dx.doi.org/10.1243/0954405021520256.

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An optimization model is constructed to select the optimum reduction ratios that minimize the total angular backlash of a gear train, under constraints on the total reduction ratio and available space. It is found that a proper layout of reduction ratios has a major effect on the total angular backlash of a gear train.

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3

Zhu, Zengbao, Longchao Cheng, Rui Xu, and Rupeng Zhu. "Impacts of Backlash on Nonlinear Dynamic Characteristic of Encased Differential Planetary Gear Train." Shock and Vibration 2019 (May 27, 2019): 1–15. http://dx.doi.org/10.1155/2019/9347925.

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A multifreedom tensional nonlinear dynamic equation of encased differential planetary gear train with multibacklash and time-varying mesh stiffness was developed in the present research. The nonlinear dynamic response was obtained by solving the formulated nonlinear dynamic equation, and the impacts of backlash on dynamic characteristics of the gear train were then analyzed by combining time process diagram, phase diagram, and Poincaré section. The results revealed that bilateral shock in meshing teeth was caused due to smaller backlash, thus causing dramatic changes in meshing force; hence, t

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4

Litvin, F. L., D. Vecchiato, A. Demenego, E. Karedes, B. Hansen, and R. Handschuh. "Design of One Stage Planetary Gear Train With Improved Conditions of Load Distribution and Reduced Transmission Errors." Journal of Mechanical Design 124, no. 4 (2002): 745–52. http://dx.doi.org/10.1115/1.1515797.

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The authors propose an approach for the design of one-stage planetary gear train with reduced transmission errors, localized bearing contact and improved conditions of distribution of load between the planetary gears. The planetary gear train is considered as a multi-body mechanical system of rigid bodies. The proposed approach is based: (i) on modification of geometry of gear tooth surfaces, and (ii) minimization and equalization of the backlash between the contacting gear tooth surfaces. The modification of geometry is accomplished: (i) by double-crowning of planetary gears, and (ii) by appl

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5

Dankov, A. M. "PLANETARY CONTINUOUSLY ADJUSTABLE GEAR TRAIN WITH FORCE CLOSURE OF PLANET GEAR AND CENTRAL GEAR: FROM IDEA TO DESIGN." Science & Technique 17, no. 3 (2018): 228–37. http://dx.doi.org/10.21122/2227-1031-2018-17-3-228-237.

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One of the reasons constraining use of a continuously adjustable gear train with compound poly-sector gear wheels in general and its most perspective version that is a planetary continuously adjustable gear train in particular is its design complexity. For example, a complex design of the mechanism for regulation of transmission gear ratio is specified by the use of involute gearing that requires a presence of backlash and bottom clearances for normal functioning and, therefore, autonomous but synchronous movement of a planet gear, as well as sectors of a central gear. In order to simplify the

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6

Zhang, Lianchao, Hongbo Liao, Dapeng Fan, Shixun Fan, and Jigui Zheng. "Design optimization analysis of an anti-backlash geared servo system using a mechanical resonance simulation and experiment." Mechanical Sciences 12, no. 1 (2021): 305–19. http://dx.doi.org/10.5194/ms-12-305-2021.

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Abstract. In many mechatronic systems, gear transmission chains are often used to transmit motion and power between motors and loads, especially for light, small but large torque output systems. Gear transmission chains will inevitably bring backlash as well as elasticity of shafts and meshing teeth. All of these nonlinear factors will affect the performance of mechatronic systems. Anti-backlash gear systems can reduce the transmission error, but elasticity has to be considered too. The aim of this paper is to find the key parameters affecting the resonance and anti-resonance frequencies of an

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7

Joshi, Yashodhan V., and Jordan E. Kelleher. "Gear Train Mesh Efficiency Study: The Effects of an Anti-Backlash Gear." SAE International Journal of Commercial Vehicles 7, no. 1 (2014): 271–77. http://dx.doi.org/10.4271/2014-01-1769.

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8

Yang, Tianfu, Shaoze Yan, Wei Ma, and Zengyao Han. "Joint dynamic analysis of space manipulator with planetary gear train transmission." Robotica 34, no. 5 (2014): 1042–58. http://dx.doi.org/10.1017/s0263574714002045.

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SUMMARYJoints of space manipulators are usually simplified as torsional springs in modeling motion equations, and the nonlinear behaviors of the reducer in the joints are generally neglected. In this study, a dynamic model of a space manipulator that considers the joints that are transmitted through a typical 2K-H planetary gear reducer is developed using the Lagrangian method. The backlash clearances, gear tooth profile error, and time-variant meshing stiffness are integrated into the process. The simulation results show that the backlash clearances lead to the accumulation of positioning err

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9

Blanche, J. G., and D. C. H. Yang. "Cycloid Drives With Machining Tolerances." Journal of Mechanisms, Transmissions, and Automation in Design 111, no. 3 (1989): 337–44. http://dx.doi.org/10.1115/1.3259004.

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The cycloidal speed reducer, or cycloid drive, is an epicyclic gear train in which the profile of the planet gear is an epitrochoid and the annular sun gear has rollers as its teeth. The cycloid drive has very high efficiency and small size, in comparison with a conventional gear mechanism, making it an attractive candidate for limited space applications. On the other hand, in this type of transmissions there exist two major drawbacks, namely, backlash and torque ripple. Backlash, the angle through which the output shaft can rotate when the input shaft is held fixed, has a degrading effect on

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10

Donmez, Ata, and Ahmet Kahraman. "An experimental methodology to study engine gear rattle problems." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 3 (2021): 3335–43. http://dx.doi.org/10.3397/in-2021-2377.

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Gear induced noise represents a major part of overall automotive drivetrain noise. Gear rattle noise is caused by strongly nonlinear dynamic behavior of the gear pair, primarily due to external torque of speed fluctuations under lightly loaded conditions. Such loading conditions cannot be generated by using the conventional gear dynamics test set-ups that employ power recirculating gearbox arrangements or conventional electric motors. In this paper, a new test set-up is introduced to emulate the actual torque/velocity fluctuations of the input and/or output members of a gear train through thre

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11

Li, Rong, Xin Xiong, Jun Ma, and Mengting Zou. "Effects of Macro-Pitting Fault on Dynamic Characteristics of Planetary Gear Train Considering Surface Roughness." Actuators 13, no. 1 (2023): 1. http://dx.doi.org/10.3390/act13010001.

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The planetary gearbox plays a vital role in a wide range of mechanical power transmission systems, including high-speed trains, wind turbines, vehicles, and aircraft. At the same time, the planetary gear train inside the gearbox is regarded as the most susceptible to failure in the entire transmission system. To analyze the influence of surface roughness on the dynamic characteristics of the planetary gear train, a dynamic modeling method based on fractal theory is proposed. Firstly, the tooth surface contact model was established based on the W-M fractal function, and the time-varying mesh st

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12

Warnecke, Martin, and Musa Jouaneh. "Backlash Compensation in Gear Trains by Means of Open-Loop Modification of the Input Trajectory." Journal of Mechanical Design 125, no. 3 (2003): 620–24. http://dx.doi.org/10.1115/1.1596241.

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This paper presents an approach to reduce the effect of the backlash nonlinearity in systems with relative cyclic motion. A compensation approach is developed to calculate a modified course of input motion for a desired velocity profile in systems with known backlash. The modified input trajectory contains accelerating and decelerating motion features to traverse the backlash area in minimal time. The method was proved with a dc-motor driven gear train. Results show that the output motion delay could be remarkably reduced. The time to overcome the backlash gap depends upon the desired velocity

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13

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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14

Al-Shyyab, A., K. Alwidyan, A. Jawarneh, and H. Tlilan. "Non-linear dynamic behaviour of compound planetary gear trains: Model formulation and semi-analytical solution." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 223, no. 3 (2009): 199–210. http://dx.doi.org/10.1243/14644193jmbd197.

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A discrete, non-linear, time-varying, torsional dynamic model of a multi-stage planetary train that is formed by any number of simple planetary stages is proposed in this study. Each planetary stage has a distinct fundamental mesh frequency and any number of planets spaced in any angular positions. The model allows the analysis of the gear train in all possible power flow configurations suitable for various gear drive ratios. It includes periodic variation of gear mesh stiffnesses as well as clearance (backlash) non-linearities that allow tooth separations. Equations of motion for the general

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15

Xu, Lijiao, and Nan Chen. "Nonlinear dynamic study and vibration reduction of a power turret gear train with modified design parameters." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 10 (2014): 1745–59. http://dx.doi.org/10.1177/0954406214547092.

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This work presents the nonlinear dynamic characteristics and vibration reduction of a numerical control power turret three-stage gear transmission system composed of four spur gears. Considering translational and rotational motions, the nonlinear lumped-parameter and multi-degrees of freedom models of modified and unmodified transmission systems are introduced to study the dynamic behavior while the time-varying mesh stiffness and backlash of gear mesh pairs are involved as internal excitations. For the requirement of high speed and low vibration, high contact ratio by modifying design paramet

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16

Wang, Michael Yu, Weijie Zhao, and Radhakrishnan Manoj. "Numerical Modelling and Analysis of Automotive Transmission Rattle." Journal of Vibration and Control 8, no. 7 (2002): 921–43. http://dx.doi.org/10.1177/10775402029594.

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This paper describes a research work on modelling and numerical analysis of torsional vibration in automotive manual transmissions. The focus of the effort is on a decoupling procedure for the numerical analysis of gear rattle. The power train model is specified into a linear sub-system and a non-linear sub-system that includes the strong nonlinearities of gear backlash and multi-stage clutch stiffness. The weak coupling of the sub-systems is then exploited for efficient numerical analysis. It is shown that the decoupled model yields an acceptable accuracy with a significant gain in computatio

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17

Sheng, Ruo Yu, Yong Wang, and Li Na Zhang. "Study on the Nonlinear Dynamics of a Single-Stage Gear Vibro-Impact System." Applied Mechanics and Materials 697 (November 2014): 161–67. http://dx.doi.org/10.4028/www.scientific.net/amm.697.161.

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A vibro-impact dynamic model of a typical single-stage spur gear train has been proposed in this study. The lumped parameter dynamic model includes the constant meshing stiffnesses, the linear time-invariant viscous damping values and the gear clearance (backlash) non-linearity allowing teeth separations. With taking account of the effect on impact of gear tooth when meshing, the dynamic equations of motion are solved for the steady period response by use of analytical method under given periodic motion conditions. The feasibility of the given periodic motion conditions is demonstrated by comp

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18

Sepehri, N., F. Sassani, P. D. Lawrence, and A. Ghasempoor. "Simulation and Experimental Studies of Gear Backlash and Stick-Slip Friction in Hydraulic Excavator Swing Motion." Journal of Dynamic Systems, Measurement, and Control 118, no. 3 (1996): 463–67. http://dx.doi.org/10.1115/1.2801168.

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Inherent to any heavy-duty hydraulic machine operation with a large number of interconnected components are nonidealities such as gear backlash, friction and leakage. The swing motion of the operator’s cabin in an excavator is a typical example. In this paper we conduct a study comprising experimental, mathematical and simulation components to determine the degree to which these nonlinearities affect the performance of such machines. The inclusion of the conventional model of backlash in the simulation of the excavator swing motion is shown to be inefficient and unnecessary in terms of computa

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19

Prajapat, Ganesh P., Pratyasa Bhui, Nilanjan Senroy, and Indra N. Kar. "Modelling and estimation of gear train backlash present in wind turbine driven DFIG system." IET Generation, Transmission & Distribution 12, no. 14 (2018): 3527–35. http://dx.doi.org/10.1049/iet-gtd.2017.1377.

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20

Prajapat, Ganesh P., N. Senroy, and I. N. Kar. "Modeling and impact of gear train backlash on performance of DFIG wind turbine system." Electric Power Systems Research 163 (October 2018): 356–64. http://dx.doi.org/10.1016/j.epsr.2018.07.006.

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21

Bai, S., and J. Angeles. "The design of spherical multilobe-cam mechanisms." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 2 (2009): 473–82. http://dx.doi.org/10.1243/09544062jmes1154.

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Cam—roller mechanisms can be used in transmissions and robotic devices as an alternative to their bevel-gear counterparts. As bevel gears are used to couple shafts of intersecting axes, their cam-mechanism replacements are bound to have intersecting axes as well. This means that the contact surface of the cam must be conical, which leads to spherical cam mechanisms. Compared with gear transmissions, cam—roller mechanisms feature low friction, low backlash, and high strength. However, cam mechanisms may end up with a high pressure angle if negative action, a motion in which the cam is driven by

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22

Du, Qinghao, Tuopu Zhang, Guilin Yang, Chin-Yin Chen, Weijun Wang, and Chi Zhang. "A 3K Planetary Gear Train with a flexure-based anti-backlash carrier for collaborative robots." Mechanism and Machine Theory 191 (January 2024): 105495. http://dx.doi.org/10.1016/j.mechmachtheory.2023.105495.

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23

Raviola, Andrea, Andrea De Martin, and Massimo Sorli. "A Preliminary Experimental Study on the Effects of Wear on the Torsional Stiffness of Strain Wave Gears." Actuators 11, no. 11 (2022): 305. http://dx.doi.org/10.3390/act11110305.

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Strain wave gears, also known as harmonic drives, are employed in a wide range of fields such as robotics and aerospace, where light weights, precision, and reliability are essential to the correct execution of the tasks. For this reason, their understanding and optimization are of high interest for both academia and industry. Previous studies have been mainly focused on investigating and modeling the working principle of strain wave gears in nominal operating conditions. On the contrary, the present paper describes the results of an experimental campaign aimed to introduce wear in gears of tw

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24

Farshidianfar, A., M. Ebrahimi, and H. Bartlett. "Hybrid modelling and simulation of the torsional vibration of vehicle driveline systems." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 215, no. 2 (2001): 217–29. http://dx.doi.org/10.1243/0954407011525593.

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Vehicle drivelines are lightly damped non-linear systems possessing many degrees of freedom with dynamic interactions between the various subsystems. There are many sources of excitation such as torsional impact caused by the take-up of backlash in the power train system. Such sources of excitation exist in transmission backlash, in driveline splines and in pinion to ring gear contact in the differential. Abrupt application or release of the throttle in slowly moving traffic or rapid engagement of the clutch can be followed by noise and vibration responses referred to in the industry as ‘clonk

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25

Wang, Zhiwei, Yao Cheng, Guiming Mei, Weihua Zhang, Guanhua Huang, and Zhonghui Yin. "Torsional vibration analysis of the gear transmission system of high-speed trains with wheel defects." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 234, no. 2 (2019): 123–33. http://dx.doi.org/10.1177/0954409719833791.

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The gear transmission system of a high-speed train is the key component, which delivers the traction torque from the motor to the wheelset. It couples with the vehicle system via the suspension system, gear meshing and the wheel–rail interface. The dynamic performance of the transmission system directly affects the operational reliability or even the running safety of high-speed trains. In this study, the effects of wheel polygonalisation and wheel flat on the dynamic responses of the transmission system are investigated through simulations of a novel vehicle dynamics model. This model integra

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26

Frech, Michael, Theodor Mammen, and Bertram Lange. "Pointing Accuracy of an Operational Polarimetric Weather Radar." Remote Sensing 11, no. 9 (2019): 1115. http://dx.doi.org/10.3390/rs11091115.

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Exact navigation of detected radar signals is crucial for usage of radar data in meteorological applications. The antenna pointing accuracy in azimuth and elevation of a polarimetric weather research radar depending on position of the sun is assessed using dedicated solar boxscans in a sequence of 10 min. The research radar of the German Meteorological Service (Deutscher Wetterdienst, DWD) is located at the meteorological observatory Hohenpeissenberg. It is identical to the 17 weather radars of the German weather radar network. A non-linear azimuthal variation of azimuthal pointing bias of up

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27

Li, Tongjie, and Rupeng Zhu. "Global Analysis of a Planetary Gear Train." Shock and Vibration 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/930350.

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By using the Poincaré-like cell-to-cell mapping method and shooting method, the global characteristics of a planetary gear train are studied based on the torsional vibration model with errors of transmission, time-varying meshing stiffness, and multiple gear backlashes. The study results reveal that the planetary with a certain set of parameters has four coexisting periodic orbits, which are P-1, P-2, P-4, and P-8, respectively. P-1 and P-2 motions are not of long-term stability, P-8 motion is of local stability, and P-4 motion is of global stability. Shooting method does not have the capacity

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28

Chen, Chao, Xiang Zhang, and Jorge Angeles. "Kinematic and Geometric Analysis of a Pure-Rolling Epicyclic Train." Journal of Mechanical Design 129, no. 8 (2006): 852–57. http://dx.doi.org/10.1115/1.2735343.

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This paper reports an innovative design of epicyclic (planetary) cam trains based on pure-rolling contact, intended to overcome the drawbacks of gear trains, such as Coulomb friction and backlash. The kinematic relations of the mechanism with a given speed-reduction ratio are analyzed; accordingly, the profiles of the sun cam and ring cam, key elements of the mechanism, are obtained. Furthermore, the condition for undercutting avoidance of the ring cam is derived. For mechanical design, different layouts of the epicyclic cam trains are discussed for the structure and transmission optimization.

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29

Li, Tong Jie, Ru Peng Zhu, and He Yun Bao. "Study on Dynamic Load Sharing Behavior of Two-Stage Planetary Gear Train Based on a Nonlinear Vibration Model." Applied Mechanics and Materials 86 (August 2011): 611–14. http://dx.doi.org/10.4028/www.scientific.net/amm.86.611.

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The nonlinear torsional vibration model of a two-stage planetary gear system is established taking errors of transmission, time varying meshing stiffness and multiple gear backlashes into account. The solution of the equations is determined by using ODE45. The influences of transmission errors on the load sharing behavior are assessed and some useful theoretical guidelines for the design of planetary gear systems are provided at last.

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30

Hasan, A. T., A. M. S. Hamouda, N. Ismail, I. Aris, and M. H. Marhaban. "Trajectory tracking for a serial robot manipulator passing through singular configurations based on the adaptive kinematics Jacobian method." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 223, no. 3 (2008): 393–415. http://dx.doi.org/10.1243/09596518jsce655.

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This paper discusses the use of artificial neural networks (ANNs) as a method of trajectory tracking control for a robotic system. Using an ANN does not require any prior knowledge of the kinematics model of the system being controlled; the basic idea of this concept is the use of the ANN to learn the characteristics of the robot system rather than to specify an explicit robot system model. In this approach, disadvantages of some schemes such as the fuzzy learning control, for example, have been elevated. Off-line training was performed for a geometric trajectory that is free of obstacles. Stu

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31

Donmez, Ata, and Ahmet Kahraman. "An experimental and theoretical investigation of the influence of backlash on gear train vibro-impacts and rattle noise." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, October 31, 2022, 146441932211343. http://dx.doi.org/10.1177/14644193221134322.

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Rattling is a perennial gear noise problem observed in various powertrain components ranging from manual transmissions to engine balancers and timing gear trains. Under lightly loaded conditions, gear systems that are subjected to input and/or output torque fluctuations exhibit vibro-impacts as tooth separations and coast-side contacts take place in the presence of backlash. Experimental set-ups that can impose tightly controlled torque fluctuations to single or multi-mesh gear train are used here to determine the sensitivity of the rattling noise levels to the magnitudes of backlash within wi

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32

Du, Fengjiao, Jiangang Liu, and Peng Qi. "Research on the seedling picking trajectory error of the gear train seedling picking mechanism considering tooth backlash." Engineering Reports, January 9, 2024. http://dx.doi.org/10.1002/eng2.12840.

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AbstractThe research investigated the tooth backlash influences the error in seedling picking trajectories of the gear train SPM. First, a sine function and the sum of random errors are taken into account is utilized to fit the tooth backlash of the firstly and secondary transmissions. Additionally, the analysis established the relationship between the fitting parameters and the tooth backlash of the firstly and secondary transmissions, in order to determine the appropriate fitting parameters. Next, the relationship between the tooth backlash of the firstly and secondary transmission in the se

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33

Wu, Shi, Mingzhu Wang, and Weidong Zhu. "Nonlinear dynamic characteristics analysis method of planetary gear train torsional vibration considering meshing oil film force." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, August 22, 2024. http://dx.doi.org/10.1177/14644193241274204.

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Planetary gear train is an important part of automatic transmission. The oil film between teeth is one of the key factors affecting the torsional vibration of planetary gear train. Selecting the appropriate oil film stiffness is of great significance for analyzing the nonlinear dynamic characteristics of planetary gear train. A method for analyzing the nonlinear dynamic characteristics of planetary gear system torsional vibration considering the oil film force between teeth is proposed in this paper. A 3-DOF torsional vibration model of planetary gear train considering oil film is established.

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34

Qi, Peng, Jiangang Liu, Gaohong Yu, Lei Wang, Haili Zhou, and Huimin Xu. "Design and Application of Noncircular Superimposed Gear." Journal of Engineering 2025, no. 1 (2025). https://doi.org/10.1155/je/1633122.

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To address the issue of seedling precision affected by transmission errors resulting from tooth backlash in the seedling pickup process, this study presented a novel solution by introducing a design method for a noncircular superimposed gear (NCSG). The influence of the different numbers of NCSG slices on meshing line length and contact ratio was analyzed. The NCSG was manufactured using wire‐cutting technology, and a transmission ratio measurement experiment was performed. In comparison with theoretical data, simulated data, and experimental data, it was found that the three were basically co

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35

Donmez, Ata, and Ahmet Kahraman. "Experimental and Theoretical Investigation of Vibro-impact Motions of a Gear Pair Subjected to Torque Fluctuations to Define a Rattle Noise Severity Index." Journal of Vibration and Acoustics 144, no. 4 (2022). http://dx.doi.org/10.1115/1.4053264.

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Abstract Vibro-impacts are common in various automotive engine and transmission gear applications. They are known to cause excessive noise levels, often called rattling or hammering. Input and output fluctuations acting on such systems cause tooth separations and sequences of impacts allowed by backlash at the gear mesh interfaces. The fluctuations leading gear rattling have often been studied for specific applications with the excitations produced typically by an internal combustion engine. As such, rattle evaluations have been often empirical and specific to the systems considered. In this s

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36

Donmez, Ata, and Ahmet Kahraman. "An Investigation of Dynamic Behavior of Electric Vehicle Gear Trains." Journal of Computational and Nonlinear Dynamics, November 15, 2024, 1–23. http://dx.doi.org/10.1115/1.4067153.

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Abstract The automotive industry has been experiencing a significant transition towards electrified powertrains in recent years. A torsional model of a common type of electric vehicle (EV) drivetrains is proposed to demonstrate certain dynamic behaviors that are unique to such high-speed applications. This two-stage helical gear drive train is supported by three shafts and connects the electric motor to the vehicle axle. The gear mesh interfaces are modeled by periodically time-varying stiffnesses subjected to backlash and displacement excitations to represent gear tooth errors and modificatio

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37

O'Toole, Michael, Ata Donmez, and Ahmet Kahraman. "An Experimental and Theoretical Study of Gear Vibro-impacts Caused by Torque Reversals." Journal of Computational and Nonlinear Dynamics, December 24, 2024, 1–15. https://doi.org/10.1115/1.4067521.

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Abstract Rapid shift towards electrified powertrains has provided gear train dynamics researchers with new challenges, one of them being transient vibro-impact behavior caused by torque reversals during the drive and regenerative braking modes of operation. Contrary to ample studies on the steady-state dynamic behavior to aid with gear whine and rattle related noise and vibration problems, the transient behavior associated with such torque reversals has not been investigated extensively. Accordingly, this paper studies the dynamic response of a single-mesh gear system subjected to external tor

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38

Abdulhady Jaber, Alaa, and Robert Bicker. "Fault Diagnosis of Industrial Robot Bearings Based on Discrete Wavelet Transform and Artificial Neural Network." International Journal of Prognostics and Health Management 7, no. 2 (2020). http://dx.doi.org/10.36001/ijphm.2016.v7i2.2365.

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Industrial robots have long been used in production systems in order to improve productivity, quality and safety in automated manufacturing processes. An unforeseen robot stoppage due to different reasons has the potential to cause an interruption in the entire production line, resulting in economic and production losses. The majority of the previous research on industrial robots health monitoring is focused on monitoring of a limited number of faults, such as backlash in gears, but does not diagnose the other gear and bearing faults. Thus, the main aim of this research is to develop an intell

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