Article
Engineering, Mechanical
Bing Cao, Fortunato Alessandro, Guolong Li, Yijie Tao, Quanfu Ran
Summary: This paper proposes a numerical calculation approach for contact pressure and load distribution of crossed beveloid gears, using an accurate finite element model and the influence coefficients technique to improve the robustness of the solving model.
MECHANISM AND MACHINE THEORY
(2022)
Article
Chemistry, Multidisciplinary
Rui Xu, Jing Zhang, Jiugen Wang, Zihui Wang, Lin Xi, Renjun Li, Hao Li
Summary: In this paper, a new calculation method of dynamic meshing force is proposed based on a new dynamic model. The influence of different factors on dynamic response and dynamic meshing force are discussed, and the results show that this new method can effectively calculate the dynamic meshing force and the load sharing ratio of each pair of teeth with different meshing characteristics.
APPLIED SCIENCES-BASEL
(2022)
Article
Mechanics
Fei Li, QiLin Zhao, Zhen Liu, DongDong Zhang, Lin Shi, JinHui Duan
Summary: This study investigates the mechanism of how soft layers affect the load distribution in composite pre-tightened tooth joints using experiments and numerical simulations, and draws relevant conclusions.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Analytical
Abdelrahman Allam, Medhat Moussa, Cole Tarry, Matthew Veres
Summary: Gears are crucial in many mechanical systems, including vehicle transmissions, but defects in their manufacturing process can lead to catastrophic failure. The current manual inspection process used by an automotive gear manufacturer in Guelph suffers from poor scalability and the risk of missing defects.
Article
Engineering, Mechanical
Aleksandar Dimic, Mileta Ristivojevic, Bozidar Rosic
Summary: This paper analyzed the load distribution of simultaneously meshed gear teeth pairs and developed analytical expressions to describe the distribution, enabling a more precise determination of the limiting values of gear teeth flank stresses and testing the accuracy of approximate expressions.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Chemistry, Physical
Svetislav Markovic, Dusan Arsic, Ruzica R. Nikolic, Vukic Lazic, Branislav Hadzima, Vladimir P. Milovanovic, Renata Dwornicka, Robert Ulewicz
Summary: This research analyzed the properties of repaired gears' teeth flanks, focusing on the influence of filler metal type on the surface characteristics of the regenerated gears' teeth flanks. The study evaluated geometrical accuracy, microstructure, and microhardness of the repaired gears, and compared them to new gears to assess the regeneration procedures.
Article
Engineering, Mechanical
Pedro M. T. Marques, Joao D. M. Marafona, Jorge H. O. Seabra
Summary: Flank line crowning is a gear surface modification that adjusts for contact imperfections caused by misalignment. It changes the contact stiffness between gear teeth, thereby modifying the gear mesh stiffness. This modification is important because fluctuations in gear mesh stiffness can impact gear performance and cause system vibration. Analytical equations derived from the elliptical contact theory are used to calculate the flank line crowning values and eliminate gear mesh stiffness fluctuations. Additionally, a method to find the load sharing of spur gears with flank line crowning is presented.
MECHANISM AND MACHINE THEORY
(2023)
Article
Engineering, Electrical & Electronic
Tufan G. Yilmaz, Gultekin Karadere, Fatih Karpat
Summary: In this study, the effect of rack tip radius, drive side pressure angle, and rim thickness on the stress of hybrid gears was investigated numerically. The stress results of hybrid gears were compared with steel gears for validation. The study found that increasing rim thickness has a positive effect on stress, single tooth stiffness, and static transmission error, while drive side pressure angle mainly affects the dynamic factor.
Article
Engineering, Mechanical
Qin Wang, Qi Wang, Liangjin Gui, Zijie Fan
Summary: This study proposes a prediction method based on frictional loaded tooth contact analysis for the mechanical efficiency of spur gears. The method considers corner contact effects and has been verified against finite element method results. Parametric analysis shows that input angular velocity, load torque, gear surface roughness, and lubricating oil viscosity have an impact on load distribution and mechanical efficiency.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Mechanical
M. A. Khalturin
Summary: A new method for designing bevel gears is proposed in this study, which can reduce the sliding ratio and improve the wear resistance of the gears.
JOURNAL OF FRICTION AND WEAR
(2022)
Article
Acoustics
Cheng Wang
Summary: Load-sharing is an important characteristic of herringbone gears transmission, but the current research does not take into account the axial displacement at low rotation speed. This study calculates the axial displacement and investigates its impact on the dynamic characteristics of herringbone gears, showing that displacement, velocity, and acceleration all undergo changes.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Engineering, Electrical & Electronic
Fabio Bruzzone, Tommaso Maggi, Claudio Marcellini, Carlo Rosso
Summary: This paper introduces a three-dimensional model for estimating deflections, load sharing, and contact conditions of meshing teeth in spur gear transmissions, using a nonlinear iterative approach to accurately determine load application points, intensities, and contact pairs without prior assumptions. Through a test case and results demonstration, this method shows superior accuracy and utility in analyzing quasi-static behavior.
Article
Physics, Multidisciplinary
J. Harding
Summary: Quantum cylindric algebras are introduced as a generalization of their classical counterpart, with primary examples being the full quantum cylindric set algebras based on Weaver's treatment of tensor power of a Hilbert space and symmetric tensor products for diagonals. A result of Sudkamp is generalized in the classical setting and axiomatized for n-dimensional full quantum cylindric set algebras.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2023)
Article
Physics, Applied
Yury S. Krivosenko, Ivan Iorsh, Ivan A. Shelykh
Summary: In this study, we quantitatively analyzed the formation of exciton-polaritons, their interactions, and pumping dynamics in cylindrical semiconductor micropillars. The redistribution of polaritonic states' populations is observed due to exciton-exciton interaction, which can be utilized in devices for generating photons with nonzero orbital angular momenta.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Analytical
Mariusz Kuczaj, Andrzej N. Wieczorek, Lukasz Konieczny, Rafal Burdzik, Grzegorz Wojnar, Krzysztof Filipowicz, Grzegorz Gluszek
Summary: The article presents a methodology for testing power transmission systems with a highly torsionally flexible metal clutch. The methodology includes amplitude and frequency analyses, as well as a sensing system based on piezoelectric and magnetic phenomena, and the Doppler effect. Contact and non-contact methods were used during the tests. The article concludes that the proposed methodology allows for the examination of the relationships between the processes at work in power transmission systems.
Article
Engineering, Mechanical
Miguel Pleguezuelos, Miryam B. Sanchez, Jose I. Pedrero
MECHANISM AND MACHINE THEORY
(2020)
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
Engineering, Multidisciplinary
Jose I. Pedrero, Debora Martinez-Lopez, Jose Calvo-Irisarri, Miguel Pleguezuelos, Miryam B. Sanchez, Alfredo Fernandez-Sison
Summary: When designing wind turbine gearboxes, the most important criteria to consider are fatigue strength, noise emission, vibrations, and maintenance requirements. In order to minimize friction losses, it is crucial to reduce friction losses while considering the impact on contact and tooth-root stress levels.
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2021)
Article
Engineering, Mechanical
Jose Pedrero, Miguel B. Pleguezuelos, Miryam Sanchez
Summary: Planetary gear sets are suitable for high power density and gear ratio, but torque is unevenly distributed among planets due to manufacturing and assembly errors. The meshing stiffness also affects the load distribution.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Multidisciplinary
Jose I. Pedrero, Miryam B. Sanchez, David Guerra, Jose Calvo-Irisarri, Miguel Pleguezuelos, Alfredo Fernandez-Sison
Summary: Mechanical efficiency is not crucial in wind turbine gearbox design. The focus is on meeting the requirements of power density, gear ratio, fatigue safety, and allowable noise and vibration levels. Reducing power and friction losses improves gearbox performance.
MATHEMATICAL PROBLEMS IN ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Jose I. Pedrero, Miguel Pleguezuelos, Miryam B. Sanchez
Summary: This paper discusses the impact of tip relief on tip interference and contact ratio, and proposes a methodology to select suitable values for tooth heights, center distances, rack shift coefficients, and tip reliefs. The goal is to achieve maximum contact ratio while avoiding tip interference, root interference, and pitch interference. The analysis also considers the influence of quasi-static transmission error on tip interference.
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2023)
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)
Proceedings Paper
Engineering, Mechanical
Miguel Pleguezuelos, Miryam B. Sanchez, Jose Pedrero
PROCEEDINGS OF THE 7TH EUROPEAN CONFERENCE ON MECHANISM SCIENCE, EUCOMES 2018
(2019)
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)