Article
Engineering, Mechanical
Zhiying Chen, Pengfei Ji
Summary: This study proposes improved analytical models for tooth profile modification and wear in gears, considering factors such as mesh stiffness and QSTE, and validates the accuracy of the models. The research shows that both tooth profile modification and wear have significant effects on gear pairs, with wear potentially overriding the modification effect.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Jose I. Pedrero, Miguel Pleguezuelos, Miryam B. Sanchez
Summary: This paper presents a simple and efficient analytical model for simulating the tooth contact of helical gears with profile modification. The model accurately determines the length of the contact line, which varies throughout the meshing cycle. The variation is influenced by the inclination of the lines, teeth deflections under load leading to an earlier start of contact, and the reduction in length due to profile modification. These factors significantly impact the mesh stiffness, transmission error, load sharing, and the dynamic behavior of the gear pair.
MECHANISM AND MACHINE THEORY
(2023)
Article
Engineering, Multidisciplinary
Zhengfa Li, Zaigang Chen, Wanming Zhai
Summary: In this study, an improved analytical model of gear mesh excitations with tooth profile deviations is established, considering extended tooth contact and the structure coupling effect. The proposed model takes into account the strong correlation among tooth contact parameters, contact force, and tooth profile deviations to better reflect the actual gear mesh. The effects of tooth profile deviations on gear mesh excitations are also investigated.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Hongzheng Han, Kaigang Yuan, Hui Ma, Zhike Peng, Zhanwei Li, Songtao Zhao, Bangchun Wen
Summary: This paper accurately calculates the initial gaps considering tooth broken faults based on tooth contact analysis, and yields the time-varying mesh stiffness and non-load transmission error using a loaded tooth contact analysis program. The study finds that neglecting the mesh stiffness of missing tooth profiles would lead to serious corner contact phenomenon, and the simulation result considering the corner contact effect is closer to the experimental result.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Huifang Xiao, Jinshan Gao, Zheng Xing
Summary: Gear tooth profile modification can alleviate mesh interference and reduce transmission error in helical gear systems. This study proposes a novel mesh stiffness model based on slicing principle for helical gear pairs with tooth profile modification. The analytical method is accurate and efficient in calculating time-varying mesh stiffness.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Siyu Chen, Aiqiang Zhang, Jing Wei, Teik C. Lim
Summary: Accurate and rapid calculation of nonlinear excitation (NE) and loaded mesh characteristics (LMC) is crucial for optimizing gear system designs. This study proposes an analytical model for calculating NE and LMC in spiral bevel gears (SBG) using Coons surface technology, mesh theory, Euler's formula, and Muller's method. The proposed method requires less computational effort compared to finite element simulations and can be extended to optimization or system analysis problems.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Zaigang Chen, Jieyu Ning, Kaiyun Wang, Wanming Zhai
Summary: This study investigates the impact of gear tooth profile deviations on gear transmissions and how to accurately calculate gear mesh forces. A dynamic model for spur gears considering detailed deformations of individual teeth is proposed, validated, and optimized. Comparison with traditional models offers theoretical guidance for selecting gear dynamic models.
NONLINEAR DYNAMICS
(2021)
Article
Engineering, Mechanical
Woo-Jin Chung, Jung-Ho Park, Ho-Gil Yoo, Young-Jun Park, Su-chul Kim, Jonghyeon Sohn, Geun-ho Lee
Summary: An analytical model is proposed to calculate the TVMS and LSTE of a helical gear pair, considering the root profile accurately. The model is validated using a finite element model, with highly similar results to experimental analysis. The proposed model is found to be more effective than traditional models in calculating TVMS and LSTE.
MECHANISM AND MACHINE THEORY
(2021)
Article
Engineering, Mechanical
Yinghui Liu, Zhanqun Shi, Xiaoang Liu, Zhe Cheng, Dong Zhen, Fengshou Gu
Summary: In the gear transmission system, tooth root crack often occurs due to the impact of machining technology and cyclic load. The appearance of tooth root cracks will affect its mesh stiffness and change the vibration characteristics of the system, thereby reducing system reliability and service life. This study proposes an accurate mesh stiffness estimation model considering the opening crack and elastoplastic deflection of the cracked tooth.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Lantao Yang, Liming Wang, Yimin Shao, Chris K. Mechefske, Qiuyuan Chen
Summary: A new calculation method is proposed in the study to accurately consider the impact of tooth and rim cracks on tooth fillet foundation stiffness, which is validated by finite element method results. The proposed method can be employed for more accurate calculation of mesh stiffness of cracked gears and further serve the fault diagnosis process of spur gear systems.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Multidisciplinary
Miguel Pleguezuelos, Miryam B. Sanchez, Jose Pedrero
Summary: This paper discusses the effects of loaded tooth deflections, manufacturing deviations, and assembly errors on spur gears, as well as the impact of profile modifications on tooth tip contact. The study shows that under variable load conditions, mesh-in impact, smooth contact, and contact ratio reduction may alternatively occur.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Multidisciplinary Sciences
Linyue Qiu, Xiangying Hou, Shushen Gao, Zhengminqing Li, Rupeng Zhu
Summary: Based on the theories of gears dynamics and meshing principles, a vibration analysis model of gear pairs is established and optimized using a hybrid algorithm. The optimized design parameters effectively reduce vibration levels and can be applied in gear transmission systems in the automotive and shipbuilding industries.
Article
Engineering, Mechanical
Zhiliang Xu, Wennian Yu, Yimin Shao, Xiaodong Yang, Chunhui Nie, Dingqiang Peng
Summary: The positioning errors of a gear pair have a direct impact on the mesh position and corner contact. In this study, the effects of positioning errors in a planetary gear set are investigated. The actual mesh position and separation distance are derived through geometric analysis, and mesh stiffness models for both internal and external gear pairs are established. A dynamic model for a planetary gear set with position errors is developed based on the proposed mesh stiffness models.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Mechanical
Haonan Li, Jinyuan Tang, Siyu Chen, Han Ding, Zhou Sun, Kaibin Rong
Summary: This paper proposes an efficient and accurate analytical calculation model for the time-varying mesh stiffness (TVMS) of spiral bevel gears, and validates its efficiency and accuracy through numerical examples. It is found that it is necessary to consider the effects of non-contacting tooth slices in the calculation to avoid excessive elastic deformation.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Pedro M. T. Marques, Joao D. M. Marafona, Ramiro C. Martins, Jorge H. O. Seabra
Summary: A continuous analytical model is presented in this work for estimating mesh stiffness, load sharing, and friction torque in parallel axis involute spur and helical gears. The model allows for a continuous description of gearing phenomena without using functions by domains. The influence of model parameters on mesh stiffness, load sharing, and friction torque is evaluated by comparing three gears of different types.
MECHANISM AND MACHINE THEORY
(2021)
Article
Engineering, Mechanical
Yuqing Liu, Zaigang Chen, Jieyu Ning, Kaiyun Wang, Wanming Zhai
Summary: This study investigates the characteristics of the locomotive traction motor operating in a vibration environment by coupling the dynamic equations of the rotor and bearings, and considering elastic deformations and nonlinear contact forces. The results indicate that the elastic deformations of the shaft and bearings can change the dynamic response of the traction motor and its support bearings.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Jieyu Ning, Zaigang Chen, Yunsheng Zhi, Xia Hua, Wanming Zhai
Summary: An improved method based on the theory of elastic mechanics for circular ring is proposed in this paper to accurately calculate the mesh stiffness of spur gears with tooth root crack. The calculated results are validated by the finite element method, and the effects of different parameters on the stiffness are investigated.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Electrical & Electronic
Changqing Shen, Yu Xia, Xingxing Jiang, Zaigang Chen, Lin Kong, Zhongkui Zhu
Summary: This study proposes a new multi-source transfer learning method, named OMSSN, to address bearing fault diagnosis under variable working conditions.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Mechanical
Zhengfa Li, Zaigang Chen, Wanming Zhai
Summary: This paper establishes a dynamic model of spur gear pair considering the extended tooth contact, coupling effect between gear neighboring teeth, and some time-varying parameters. The study reveals the impact of the extended tooth contact and coupling effect on the bifurcation characteristics of the gear system. The results show that the coupling effect between neighboring teeth intensifies the system bifurcation and chaotic motion, while extended tooth contact enhances this effect. However, more extended tooth contact decreases the parameter range of system bifurcation.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Mechanical
Yuqing Liu, Zaigang Chen, Yifan Li, Wanming Zhai
Summary: This study establishes a skidding dynamics model of lubricated rolling bearings, considering the interactions between the roller and races, as well as the cage. The effects of lubricant stiffness, film thickness, friction coefficient, passing flow resistances, and resistance torques on the dynamic characteristics of the bearing are analyzed. The study also explores methods to mitigate skidding, such as adjusting roller number, lubricant properties, and interference fit. The results show that skidding is induced by low tangential friction forces and high passing flow resistances, and can be alleviated by strengthening interactions at the roller-race interface or reducing running resistance.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Zaigang Chen, Yunsheng Zhi, Kaiyun Wang, Wanming Zhai
Summary: This study establishes a rigid-flexible locomotive coupled dynamics model of an HX locomotive and investigates the effects of the drive and transmission system on the wheel-rail dynamic response and wheel polygonal wear. The evolution of wear depth under different running speeds and wheel profile initial states is also studied.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Engineering, Mechanical
Yifan Li, Xin Zhang, Zaigang Chen, Yaocheng Yang, Changqing Geng, Ming J. Zuo
Summary: This paper proposes a novel time-frequency ridge estimation (TFRE) method, which integrates a new cost kernel function and an adaptive search region detection principle to improve the performance of ridge estimation. Experimental results demonstrate that the proposed TFRE outperforms state-of-the-art methods in ridge estimation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Multidisciplinary
JieYu Ning, ZaiGang Chen, WanMing Zhai
Summary: An improved mesh stiffness calculation method for helical gear with spatial crack is proposed in this study to consider the coupling effects between neighboring loaded teeth, improving the accuracy and applicability of the calculation. The load distribution law for the engaged cracked tooth along the tooth width and profile can be obtained. The results show that the mesh stiffness of the multi-tooth engagement calculation using this model can be further improved compared with traditional methods.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Kun Yue, Zhong Kang, Mengjie Zhang, Liming Wang, Yimin Shao, Zaigang Chen
Summary: An improved gear meshing power loss calculation method is proposed in this paper to consider the coupling effects between gear friction and dynamic characteristics. A six degrees-of-freedom gear dynamic model and power loss iteration calculation process are established, and the effects of gear surface quality and loads on power loss are analyzed. Experimental results show that this method is in better agreement with the experimental results compared to the traditional method.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Yuqing Liu, Zaigang Chen, Kaiyun Wang, Wanming Zhai
Summary: The gear transmission in high-speed trains is important for transmitting traction torque. Wheel-rail interactions can affect the gear transmission and support bearings on curves with larger centrifugal forces. To address this, a spatial vehicle-track coupled dynamics model is proposed, considering various factors such as time-varying mesh stiffness, dynamic transmission error, support stiffness, and internal interactions of the gearcase bearing. Results show that the lateral force and derailment coefficient are affected by the lateral component of the mesh force, and the centrifugal effect influences the contributions of the gear pair's lateral and vertical motions.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Automation & Control Systems
Yifan Li, Yaocheng Yang, Ke Feng, Ming J. J. Zuo, Zaigang Chen
Summary: This article proposes a new automated and adaptive ridge extraction method for accurately extracting the instantaneous frequency information of signal components from time-frequency graphs. It has the advantage of assessing machine health conditions without rotational speed measurement.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Mechanical
Zirui Ye, Zaigang Chen, Ziwei Zhou, Wanming Zhai
Summary: This paper develops a dynamics model of a locomotive with direct drive traction system, taking into account the electromechanical coupling effect and nonlinearities in the wheel-rail contact and flexible transmission coupling. The results show that the harmonic components in the electrical subsystem have significant effects on the key components of the locomotive and can cause resonance in the mechanical transmission system at specific speeds. The resonance can be eliminated by adopting a harmonic suppression algorithm.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Engineering, Electrical & Electronic
Yifan Li, Ke Feng, Yuejian Chen, Zaigang Chen
Summary: In this article, a multioperator morphological undecimated wavelet (MOMUW) approach is proposed to effectively denoise and extract impulse features from vibration mixtures. Experimental results demonstrate that the proposed method can accurately detect wheelset bearing compound faults and outperforms the existing approaches. Moreover, the success and failure of MUWs with different operators and levels in bearing fault diagnosis are analyzed and compared, providing a theoretical foundation for constructing new MUWs.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Mechanical
Zaigang Chen, Jieyu Ning, Guojun Yang, Zhihui Chen, Jizhong Yang, Wanming Zhai
Summary: This study developed a dynamic model for the rack railway vehicle and track system to evaluate their dynamic behaviors on large-slope lines. The research found that the vibration responses of the wheelset and the rack are mainly influenced by the gear-rack mesh excitations, and the presence of gear-rack engagement reduces wheel loads.
VEHICLE SYSTEM DYNAMICS
(2023)
Article
Engineering, Mechanical
Yaoxiang Yu, Liang Guo, Zaigang Chen, Hongli Gao, Zhifeng Shi, Guoli Zhang
Summary: Two cage crack models are proposed in this study and coupled with the axle-box bearing model to investigate the dynamic characteristics and changes in contact forces caused by cracks.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Mechanical
Antonella Castellano, Pietro Stano, Umberto Montanaro, Marco Cammalleri, Aldo Sorniotti
Summary: This paper proposes a new control strategy for hybrid electric vehicles, called Model Predictive Control (MPC), and considers the losses in transmission gears. Through a case study on Chevrolet Volt, the results show that the simplified internal model has a minor impact on fuel consumption performance.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Rui Peng, Gregory S. Chirikjian
Summary: This article introduces a method of designing morphable thick-panel origami structures using reconfigurable linkages, which improves the potential of origami techniques for different tasks and solves the limitations of one-DOF and multiple-DOF folding structures.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Gaohan Zhu, Weizhong Guo, Yinghui Li, Youcheng Han
Summary: Comprehensive and accurate performance evaluation is crucial for profile synthesis and analysis of higher pair mechanisms. This paper proposes evaluation indices and methods for the transmission performance of planar higher pair mechanisms from different perspectives. It subdivides the transmission performance into element-based performance and joint-based performance and develops novel indices specific to higher pair mechanisms. A graphical mapping method based on element-based performance is also proposed for intuitive analysis. Practical examples validate the effectiveness of the proposed indices and methods for evaluating the performance of higher pair mechanisms.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Ke Wu, Gang Zheng, Guimin Chen, Shorya Awtar
Summary: Researchers proposed a new modeling method, namely Body-frame Beam Constraint Model (BBCM), to predict and optimize the design of high-precision compliant mechanisms (CMs).
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Youcheng Han, Weizhong Guo, Changjie Zhao, Ziyue Li, Ze Fu, Yinghui Li
Summary: This study proposes a structural synthesis methodology that considers motion, force, and energy characteristics simultaneously to design efficient mechanisms.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Cristian Enrico Capalbo, Daniel De Gregoriis, Tommaso Tamarozzi, Giuseppe Carbone, Domenico Mundo
Summary: This study proposes a novel flexible multibody formulation that enables efficient updating of models while maintaining small size and high accuracy. Numerical validation demonstrates its wide applicability across various materials and mechanisms, showing promising results in terms of accuracy.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Weihao Zhao, Junbei Liao, Wei Qian, Haoyong Yu, Zhao Guo
Summary: This paper presents a newly designed compliant actuator using a tensile springs array to address the challenges in achieving linear and consistent elastic properties, low friction, minor hysteresis, and good compliance in series elastic actuators (SEA). The unique geometry of the spring array enables the SEA to have consistent rotary stiffness with minimal friction and hysteresis. The device's performance is evaluated using PID and sliding mode control, demonstrating its constant low rotary stiffness and torque tracking bandwidth, making it suitable for human-robot interaction requirements.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Mohui Jin, Yukang Luo, Xing Xu, Bowei Xie, Weisheng Wang, Zewei Li, Zhou Yang
Summary: This paper presents a method for evaluating the contact interaction between compliant mechanisms and external objects. By establishing a numerical model and introducing contact springs to describe the contact forces, the deformation and normal contact force/stress can be accurately calculated. The static equilibrium configuration and contact force/stress can be obtained by minimizing the total potential energy function of the system.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Alejandro G. Gallardo, Martin A. Pucheta
Summary: This paper presents a method for the synthesis of parallel flexure systems using Screw Theory and Linear Algebra. The method is validated through three case studies and offers a simple and precise design with decoupled actuators.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Xiao Wang, Chenglin Liu, Haoxiang Sun, Hanwen Song
Summary: This paper presents a new decomposition mode for robot-world calibration, which decomposes the Ad(SE(3)) equation using Chasles' motion. A two-step method based on point set matching is proposed. The superiority of this method is verified through simulations and experiments.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Yanlin Chen, Xianmin Zhang, Yanjiang Huang, Yanbin Wu, Jun Ota
Summary: This study establishes an error model for a 3-RRR+UR spherical parallel mechanism and analyzes the sensitivity of error parameters. A design structure is proposed to reduce input errors based on the analysis. Experimental results show that the multiloop circuit incremental method provides more accurate results.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Vu Linh Nguyen, Chin-Hsing Kuo, Po Ting Lin
Summary: This paper presents a method for analyzing the performance of gravity-balanced serial robotic manipulators under dynamic loads and uses a three-degree-of-freedom planar serial manipulator as a case study. The significance of this method is demonstrated by evaluating the impact of dynamic loads on gravity-balanced performance and proposing a step-by-step design procedure to improve it.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Shifeng Rong, Jiange Zhang, Xing Zhang, Keliang Li, Kaibin Rong, Zhenyu Zhou, Han Ding
Summary: This article proposes a data-driven dry cutting tool collaborative optimization model to improve the economic and environmental attributes of facehobbing hypoid gears. An innovative ease-off tooth contact analysis method is introduced to establish accurate relations between ease-off flank and loaded contact performance evaluations. The proposed model significantly improves sustainability in terms of economic and environmental assessments.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Kemal Eren, Soley Ersoy, Ettore Pennestri
Summary: This research investigates the instantaneous kinematics of the terminal link of a planar two-link open chain using the complex-number technique and higher-order instantaneous invariants.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Bo Han, Zhantu Yuan, Jiachuan Zhang, Yundou Xu, Jiantao Yao, Yongsheng Zhao
Summary: This paper proposes novel deployable mechanism units with self-limiting position function, and constructs ring truss deployable mechanisms. The degrees of freedom (DOF) of deployable units are analyzed and it is proved that the constructed ring truss deployable mechanisms have only one DOF. The dynamic model of the deployable mechanism unit with passive actuation is established and verified by simulation. The deployable mechanism units proposed in this paper have the advantages of good scalability and stability, and have broad application prospects.
MECHANISM AND MACHINE THEORY
(2024)
