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
Dong Guo, Qinfeng Ning, Shuaishuai Ge, Yawen Wang, Yi Zhou, Xiaohui Shi
Summary: A nonlinear dynamic model is developed in this paper to study the vibration response and nonlinear behavior of gear rattle. The model considers multiple nonlinear factors and is verified through comparison with bench test results. Parametric study using various analysis methods reveals important characteristics of the system, providing guidance for the understanding and control of gear rattle.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Mechanical
Jingyue Wang, Ning Liu, Haotian Wang, E. Jiaqiang
Summary: A torsional vibration model of planetary gear system is established based on lumped mass method, considering nonlinear factors such as friction, time-varying meshing stiffness, backlash, and comprehensive error. The system experiences multiple periodic and chaotic motions influenced by parameters like excitation frequency, damping ratio, comprehensive error amplitude, load and backlash, with tooth friction playing a significant role in shaping the system's bifurcation behavior.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Article
Engineering, Mechanical
Siyu Wang, Rupeng Zhu
Summary: A non-linear dynamic model of a fixed-axis spur planetary gear-rotor-bearing system for the gearbox in Geared Turbofan (GTF) engine is established and analyzed, revealing abundant non-linear behaviors and dynamic characteristics. The dynamic response under varying frictional coefficients is demonstrated, and vibration characteristics are investigated and controlled through changing support stiffness of star bearing. These results provide insights into undesirable dynamic motion and serve as a reference for the design and control of gear systems.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Yang Liu, Yinghou Jiao, Shiyuan Qi, Guangbin Yu, Mengdi Du
Summary: In this study, a 2-DOF oscillator model with spring and damping elements was established to reveal the nonlinear dynamic behavior of gear rattling vibration caused by gear backlash. The influence of different restitution coefficients on gear impact-meshing motion was studied by numerical simulation. The results showed that the grazing bifurcation caused by gear backlash will lead to complex mapping structures of the system and the restitution coefficient directly affects the impact-meshing behavior.
Article
Mathematics, Interdisciplinary Applications
Kang Huang, Zhenbang Cheng, Yangshou Xiong, Guangzhi Han, Luyang Li
Summary: This study investigates the dynamic characteristics of a spur gear pair system with two kinds of gear backlash, focusing on modeling and deriving the sliding friction force. A torsional dynamic model is established, and simulation experiments are conducted using rotational velocity and initial gear backlash as variables. Comparison of system behavior reveals that the system with fractal backlash exhibits chaos at higher rotational speed and initial gear backlash, while the system with fixed backlash displays richer nonlinear dynamic behaviors. The results provide insights for future spur gear design and manufacturing.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Engineering, Mechanical
Mo Shuai, Zhang Yingxin, Song Yuling, Song Wenhao, Huang Yunsheng
Summary: The nonlinear dynamic model of the non-orthogonal face gear-rotor-bearing system was established in this study, considering the influence of nonlinear features such as time-varying meshing stiffness, transmission error, tooth backlash, bearing clearance, and collision force and friction between tooth. The effects of excitation frequency, friction coefficient, and support stiffness on the dynamic characteristic of the system were analyzed using various methods. The results revealed that the non-orthogonal gear-rotor-bearing transmission system exhibits a variety of nonlinear characteristics, and the parameters of the system should be controlled to ensure stability and prevent amplitude mutation.
NONLINEAR DYNAMICS
(2022)
Article
Mechanics
Ghasem Arian, Sajjad Taghvaei
Summary: This study analyzes chaotic dynamics and develops a chaos controller for spur gear transmission systems with idler gears. The study establishes a nonlinear time-varying dynamic model, finds a region of chaos occurrence, and suppresses chaotic vibrations through control laws. Numerical simulations confirm the controller's performance.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Mechanical
Jiajun Chen, Rupeng Zhu, Weifang Chen, Miaomiao Li, Xunmin Yin, Guanghao Dai
Summary: This paper investigates the unevenness of backlash and its influence on the dynamic characteristics of helical gears with mixed modification. A quantitative calculation model is developed to analyze the meshing force and friction torque considering the meshing state and contact state. By optimizing the modification parameters, the vibration amplitude of the system is significantly reduced, and the method is also applicable to other unconventional tooth surfaces.
NONLINEAR DYNAMICS
(2023)
Article
Acoustics
Chao Lin, Yu Wang, Yanan Hu, Gui Ran, Yongquan Yu
Summary: This paper establishes dynamic and Lagrange bond diagram models for the eccentric curve-face gear transmission system, analyzing the effects of gear eccentricity, helical angle, tooth profile, and input velocity on vibration response. It concludes that the dynamic response of this system is highly nonlinear, with gear eccentricity modulating both amplitude and frequency. Introducing a force-locking spring or having a time-varying helical angle negatively affects the system's dynamic characteristics.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Mathematics, Interdisciplinary Applications
Ling Xiang, Chaohui An, Aijun Hu
Summary: The study introduces a translational-torsional nonlinear dynamic model of a multistage gear system with root crack fault, and compares the dynamic features of cracked and normal systems using various analysis methods. The results provide a theoretical basis for fault diagnosis of wind turbine gearboxes.
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
(2021)
Article
Multidisciplinary Sciences
Jong-Yun Yoon, Byeongil Kim
Summary: The main goal of this study is to suggest mathematical and numerical approaches to determine the complex dynamic behaviors regarding the bifurcation characteristics in nonlinear systems. The methods employed in this study successfully explain the basic ways to examine the bifurcation phenomena when the HBM is implemented.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Mechanical
Xu Zhang, Jiaxin Zhong, Wei Li, Mateusz Bocian
Summary: This paper investigates the relationship between high-speed gear wear and nonlinear dynamics in a wind turbine gearbox, taking into account tooth contact temperature. The study shows that tooth contact temperature affects the dynamics of the system and increases the extent of gear wear. This research provides a basis for the diagnosis and detection of gear transmission system failures.
MECHANISM AND MACHINE THEORY
(2022)
Article
Acoustics
Jingyue Wang, Ning Liu, Haotian Wang, Lixin Guo
Summary: Based on a planetary gear transmission system considering the coupling effects of friction and elastohydrodynamic lubrication, a torsional dynamic model incorporating various factors such as friction, oil film, time-varying meshing stiffness, meshing damping, and gear backlash is established. The numerical results show that the system exhibits rich nonlinear dynamic characteristics such as short-period motion, long-period motion, and chaotic motion as the excitation frequency increases. The increase of lubricant viscosity, sun-planet backlash, and planet-ring backlash each have distinct effects on the system's dynamic behavior, influencing the occurrence of chaotic motion, periodic motion, and bifurcation characteristics.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2021)
Article
Thermodynamics
Zhe Yuan, Fei Fan, Xiaotian Bai
Summary: This study establishes a nonlinear dynamics model of the gear transmission system by considering the effects of temperature and surface wear on gear meshing, and analyzes the complex effects of internal excitation variations on gear dynamics.
ADVANCES IN MECHANICAL ENGINEERING
(2022)
Article
Computer Science, Software Engineering
Fanchao Zhong, Wenqiang Liu, Yu Zhou, Xin Yan, Yi Wan, Lin Lu
COMPUTERS & GRAPHICS-UK
(2020)
Article
Automation & Control Systems
Yan Xia, Yi Wan, Xichun Luo, Hongwei Wang, Ning Gong, Jinglong Cao, Qinghua Song, Zhanqiang Liu
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Automation & Control Systems
Yan Xia, Yi Wan, Xichun Luo, Zhanqiang Liu, Qinghua Song
Summary: An improved full-discretization method is proposed to predict the stability lobe diagram of a machining system, with results showing that the FDM with a second-order Lagrange polynomial is optimal and has better computational performance for stability prediction. Changes in dynamic parameters, particularly increases in stiffness and damping ratio, influence chatter stability, leading to enhanced limit cutting depth.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Industrial
Xiaoliang Liang, Zhanqiang Liu, Bing Wang, Qinghua Song, Yukui Cai, Yi Wan
Summary: The study proposed a multi-physics model considering the impact of tool wear on tool geometrical alterations to predict residual stress distribution in orthogonal turning Ti-6Al-4 V. Experimental results confirmed the effectiveness of the model under tool wear conditions, providing a novel method for controlling residual stress distribution through monitoring tool wear morphology.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Automation & Control Systems
Yan Xia, Yi Wan, Xichun Luo, Zhanqiang Liu, Qinghua Song
Summary: An improved numerical integration method is proposed for predicting milling stability by dividing the milling dynamic model into free and forced vibration stages and constructing an efficient and accurate state transition matrix. Experimental results show that this method outperforms existing methods in terms of accuracy and computational efficiency.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zhenbing Ji, Yi Wan, Zihe Zhao, Teng Wang, Mingzhi Yu, Hongwei Wang, Shiyuan Fan, Zhanqiang Liu, Chao Liu
Summary: This paper aims to improve the biocompatibility of 3D-printed Ti-6Al-4V implants through multi-scale composite structure and bioactive coating. The modified implants showed improved surface wettability and corrosion resistance, as well as excellent osteogenic induction performance and antibacterial properties.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Robotics
Youjie Zhou, Yiming Wang, Fabio Poiesi, Qi Qin, Yi Wan
Summary: This paper proposes a loop closure detection method based on L3Ds, which calculates the metric error between descriptors to accurately detect loops even in cases of small overlaps. The method achieves state-of-the-art accuracy on LiDAR data and improves the localization accuracy of the RESLAM system.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Materials Science, Ceramics
Shiyuan Fan, Yi Wan, Zihe Zhao, Hongwei Wang, Zhenbing Ji
Summary: A growing trend is to use bioactive ceramics to develop bone scaffolds. Improving the bioactivity and osteoinductive ability of biphasic calcium phosphate (BCP) scaffold is important. Polydopamine (PDA) coating, chitosan (CS) coating, and their composite coatings can improve scaffold bioactivity. CS/PDA coating has the greatest effect in improving cell viability and promoting osteogenic differentiation.
CERAMICS INTERNATIONAL
(2022)
Article
Automation & Control Systems
Chenchen Tian, Yi Wan, Xuekun Li, Yiming Rong
Summary: This paper demonstrates the manufacturing of a porous grinding wheel with octahedron lattice structure using additive manufacturing technology. The lattice structure enables intermittent grinding, reducing specific grinding energy without sacrificing material removal capacity. The additively manufactured wheel is insensitive to grinding depth and feed rate.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Review
Engineering, Biomedical
Zhenbing Ji, Yi Wan, Hongwei Wang, Mingzhi Yu, Zihe Zhao, Teng Wang, Guoxuan Ma, Shiyuan Fan, Zhanqiang Liu
Summary: Titanium and its alloys are widely used in bone tissue defect treatment due to their excellent comprehensive properties. However, achieving satisfactory osseointegration and preventing inflammatory responses when implanted into the body has become a new research hotspot. Various surface modification methods have been proposed, but there is a need to classify and compare these methods systematically. This manuscript summarizes and discusses the effect of physical signal regulation (multi-scale composite structure) and chemical signal regulation (bioactive substance) generated by surface modification in promoting osteogenesis and reducing inflammatory responses.
BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Mechanical
Yao Sun, Yi Wan, Haifeng Ma, Xichang Liang
Summary: This study aims to develop an advanced controller for high-accuracy tracking control of hydraulic manipulators. It discovers that pressure shock disturbance significantly impairs the tracking performance. To address these issues, a shock disturbance compensation controller (SDCC) based on backstepping is proposed in this research. Experimental results show that the addition of SDCC reduces the maximum tracking error and variance of PID by an average of 68.7% and 68.55%, respectively.
NONLINEAR DYNAMICS
(2023)
Article
Robotics
Youjie Zhou, Guofeng Mei, Yiming Wang, Fabio Poiesi, Yi Wan
Summary: This study proposes FusionRAFT, a novel deep neural network approach that enables early-stage information fusion between RGB and depth modalities for estimating optical and scene flow. By incorporating self- and cross-attention layers at different network levels, FusionRAFT constructs informative features that leverage the strengths of both modalities. Comparative experiments demonstrate that our approach outperforms recent methods on the FlyingThings3D synthetic dataset and shows better generalization on the real-world KITTI dataset. Furthermore, our approach exhibits improved robustness in the presence of noise and low-lighting conditions affecting RGB images.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Robotics
Yao Sun, Yi Wan, Haifeng Ma, Xichang Liang
Summary: This study proposes a real-time control force algorithm for precise force control of hydraulic manipulator arms without the need for force or pressure feedback. The algorithm utilizes the nonlinear relationship between the hydraulic manipulator arm's servo valve pressure, voltage, and dynamics to accurately control the force applied by the manipulator's arm. It does not require force or pressure sensors and can adapt to different degrees of freedom, greatly reducing manual intervention.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Engineering, Biomedical
Hongwei Wang, Yi Wan, Quhao Li, Xinyu Liu, Mingzhi Yu, Xiao Zhang, Yan Xia, Qidong Sun, Zhanqiang Liu
Summary: The study developed a porous Ti fusion cage using a multiscale optimization approach, evaluated and manufactured through numerical simulations and selective laser melting. The designed porous cage showed improved biomechanical performance, contributing to reducing the risks of cage subsidence and stress shielding.
BIO-DESIGN AND MANUFACTURING
(2022)
Article
Computer Science, Information Systems
Yan Xia, Yi Wan, Xichun Luo, Yanan Li, Jinglong Cao, Qinghua Song, Zhanqiang Liu
