Mechanism and Machine Theory最新文献

Lapping tooth surface micro-topography prediction for extended epicycloid hypoid gears

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-27 DOI: 10.1016/j.mechmachtheory.2025.105931

Jun Wen , Wenlong Du , Jinbo Hou , Shifeng Rong , Zhenyu Zhou , Qiang Wang , Han Ding

{"title":"Lapping tooth surface micro-topography prediction for extended epicycloid hypoid gears","authors":"Jun Wen , Wenlong Du , Jinbo Hou , Shifeng Rong , Zhenyu Zhou , Qiang Wang , Han Ding","doi":"10.1016/j.mechmachtheory.2025.105931","DOIUrl":"10.1016/j.mechmachtheory.2025.105931","url":null,"abstract":"<div><div>Lapping is a complex precision tooth surface cutting technology for the extended epicycloid hypoid gears, which relies on experienced engineers to obtain ideal machining quality by setting the process parameters reasonably and accurately controlling cutting process. In order to improve the predictability and controllability, influence of different gear parameters on lapping process and geometric topography was systematically studied. Focusing on tooth surface lapping and its micro-topography, an innovative prediction method id proposed. Firstly, the hypoid gear pair model is established, and then height parameters of the tooth surface are calculated by the deduced lapping depth formula. Then, a local tooth surface was reconstructed based on the height parameters by using fast Fourier transform, and prediction model of micro-topography considering the initial topography and random wear mechanism was established. Finally, different lapping parameters considering cutting characteristics of abrasive particles is designed for their influence on tooth surface micro-topography.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105931"},"PeriodicalIF":4.5,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Classification of the three-dimensional persistent POE manifolds of SE(3)

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-22 DOI: 10.1016/j.mechmachtheory.2025.105926

Marco Carricato

{"title":"Classification of the three-dimensional persistent POE manifolds of SE(3)","authors":"Marco Carricato","doi":"10.1016/j.mechmachtheory.2025.105926","DOIUrl":"10.1016/j.mechmachtheory.2025.105926","url":null,"abstract":"<div><div>The set of rigid displacements of the end-effector of a mechanism is ordinarily a manifold of the special Euclidean group SE(3). The tangent spaces of the manifold form vector spaces of twists describing the end-effector instantaneous motions. The twist space at any generic pose is often required to be a rigidly-displaced copy of the twist space in the home configuration: when this happens the twist space and the corresponding manifold are called persistent. There are three known families of persistent manifolds of SE(3). The first one comprises the Lie groups of SE(3), for which the twist space is invariant and coincides with a subalgebra of the Lie algebra of SE(3). The second family includes the symmetric spaces of SE(3), for which the twist space is a persistent Lie triple system. The third family is a subset of the product-of-exponential (POE) manifolds, which emerge by the product of two or more Lie groups and naturally describe the motion of serial chains. While the classification of Lie groups and symmetric spaces of SE(3) is state-of-the-art, the classification of persistent POE manifolds is yet to be completed. This paper provides the derivation and classification of persistent POE manifolds of dimension 3.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105926"},"PeriodicalIF":4.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a compliant mechanism with collinear input and output

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-21 DOI: 10.1016/j.mechmachtheory.2025.105932

Mao-Lin Liao , Ngoc Dang Khoa Tran , Dung-An Wang

{"title":"Design of a compliant mechanism with collinear input and output","authors":"Mao-Lin Liao , Ngoc Dang Khoa Tran , Dung-An Wang","doi":"10.1016/j.mechmachtheory.2025.105932","DOIUrl":"10.1016/j.mechmachtheory.2025.105932","url":null,"abstract":"<div><div>In this paper, we propose an approach for the topology design of a single-input, double-output (SIDO) compliant mechanism with collinear inputs and outputs. The topology design of the SIDO mechanism is accomplished by superimposing two single-input, single-output (SISO) sub-mechanisms. A kinetostatic model, based on the beam constraint model (BCM), is developed for the SIDO mechanism. Subsequently, dimensional design is applied to the conceptual configurations of the SIDO mechanism using an optimization method. The BCM becomes more efficient and capable of addressing complex displacement analyses by integrating the virtual slider model. Potential applications of the proposed SIDO compliant mechanism include miniature presses and tensile testing machines. The primary contributions of this work are twofold. First, we introduce a topology design approach based on superimposition to generate feasible configurations of SIDO planar compliant mechanisms with collinear inputs and outputs. Second, we integrate virtual sliders into a BCM model to address the challenge of modelling linkage-type compliant mechanisms with multiple outputs.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105932"},"PeriodicalIF":4.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sym-ML: A symplectic machine learning framework for stable dynamic prediction of mechanical system

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-21 DOI: 10.1016/j.mechmachtheory.2025.105934

Ningning Song , Haijun Peng , Xu Guo

{"title":"Sym-ML: A symplectic machine learning framework for stable dynamic prediction of mechanical system","authors":"Ningning Song , Haijun Peng , Xu Guo","doi":"10.1016/j.mechmachtheory.2025.105934","DOIUrl":"10.1016/j.mechmachtheory.2025.105934","url":null,"abstract":"<div><div>Due to the complexity and nonlinearity of mechanical system, traditional dynamic analysis methods are often struggle to balance computational efficiency and accuracy. In order to overcome the challenges existing in the current numerical methods, this paper proposes a novel mechanism-data hybrid-driven method for dynamic analysis of mechanical system via symplectic mathematical theory, machine learning theory and multibody system theory. The proposed method introduces the variational principle into neural network to establish a symplectic machine learning framework, which leverages the high precision advantages of symplectic theory and the efficient and strong generalization ability of neural network, thereby achieving efficient and high precision dynamic prediction of constrained mechanical system. And the characteristic of symplectic conservation of the proposed strategy is proved both in mathematical and numerical perspectives. In addition, three numerical examples are studied, the comparison results indicate that the proposed strategy can perform outstanding advantages in terms of numerical accuracy and computational efficiency, and the proposed method can also predict high precision results without the need for retraining when certain parameters change of the mechanical system.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105934"},"PeriodicalIF":4.5,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiplanar manufacturing: A new approach to design for manufacturing and assembly of origami

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-15 DOI: 10.1016/j.mechmachtheory.2024.105906

Tyler R. Stevens, Nathan B. Crane

{"title":"Multiplanar manufacturing: A new approach to design for manufacturing and assembly of origami","authors":"Tyler R. Stevens, Nathan B. Crane","doi":"10.1016/j.mechmachtheory.2024.105906","DOIUrl":"10.1016/j.mechmachtheory.2024.105906","url":null,"abstract":"<div><div>This paper explores multiplanar manufacturing as an alternative approach for fabricating three-dimensional origami-inspired devices. Traditional origami manufacturing techniques typically employ a monoplanar method, which confines origami to a single plane, during manufacturing, and limits their design efficiency. By contrast, multiplanar manufacturing fabricates panels and hinges across multiple planes, offering greater design flexibility and the potential to eliminate some assembly/bonding operations. This study demonstrates the impact of multiplanar manufacturing on material usage, build footprint, and actuation requirements. For the geometries used as a case study, the benefits of multiplanar manufacturing include reducing material usage by up to 62%, actuation steps by up to 93%, and build footprint by up to 91%—relative to a monoplanar configuration in the geometries studied. These benefits improve efficiency, streamline assembly processes, and enable new avenues for fabricating origami-inspired devices. The findings position multiplanar manufacturing as a promising strategy for efficiently producing three-dimensional origami-inspired structures, paving the way for advancements in various engineering fields.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105906"},"PeriodicalIF":4.5,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic modeling and response analysis of cracked herringbone gear transmission systems with installation errors

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-15 DOI: 10.1016/j.mechmachtheory.2025.105924

Wenkang Huang , Haodong Hu , Hui Ma

引用次数: 0

A 3-dof parallel continuum robot with large orientation workspace: Modeling, simulation and experiment

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-11 DOI: 10.1016/j.mechmachtheory.2024.105908

Yuhang Lei, Ming Jiang, Yusuke Sugahara, Yukio Takeda

{"title":"A 3-dof parallel continuum robot with large orientation workspace: Modeling, simulation and experiment","authors":"Yuhang Lei, Ming Jiang, Yusuke Sugahara, Yukio Takeda","doi":"10.1016/j.mechmachtheory.2024.105908","DOIUrl":"10.1016/j.mechmachtheory.2024.105908","url":null,"abstract":"<div><div>Parallel Continuum Robots (PCRs) offer flexibility, safety, and agility due to their continuous structure. The parallel configuration further enhances precision and stiffness, making them particularly suitable for applications in confined spaces and human-contact environments, such as collaborative and surgical robots. In this paper, we conducted thorough investigation of a novel 3-Degree-of-Freedom PCR design with a large orientation workspace which we have proposed before. We first provided a general kineto-static model based on Kirchhoff rod theory, which is a simplified form of Cosserat rod theory. The workspace of the novel PCR design was then analyzed through MATLAB simulations using the developed kineto-static model. Experiments were conducted to validate the twisting motion ability and investigate the motion of the prototype in comparison to model predictions. Additionally, we analyzed several singularity configurations from the perspective of elastic potential energy. The paper concludes with a summary of the behavior of this design and a discussion of future research directions.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105908"},"PeriodicalIF":4.5,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Type synthesis of variable-DOF single-loop spatial mechanisms using Bennett 4R mechanisms and Goldberg 5R mechanisms

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-08 DOI: 10.1016/j.mechmachtheory.2024.105902

Xianwen Kong

引用次数: 0

Analysis of multi-state meshing and dynamic stability of herringbone gears considering friction based on nonlinear dynamics

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-06 DOI: 10.1016/j.mechmachtheory.2024.105909

Zongxiang Yue , Zengcheng Wang , Zhaobo Chen , Jianjun Qu , Guangbin Yu , Jiazhi Wang , Shuai Mo

{"title":"Analysis of multi-state meshing and dynamic stability of herringbone gears considering friction based on nonlinear dynamics","authors":"Zongxiang Yue , Zengcheng Wang , Zhaobo Chen , Jianjun Qu , Guangbin Yu , Jiazhi Wang , Shuai Mo","doi":"10.1016/j.mechmachtheory.2024.105909","DOIUrl":"10.1016/j.mechmachtheory.2024.105909","url":null,"abstract":"<div><div>During the operation of herringbone gears some phenomena such as gear disengagement and back-side meshing (BSM) can lead to dynamic instability. Precise description of the behavior of multi-state meshing (MSM) is essential for the optimization of structures and for evaluation of its performance. In this article a nonlinear dynamic model for a herringbone gear is introduced. This model includes MSM and takes backlash and friction into account. MSM behavior is identified, and a dynamic stability rate (DSR) is calculated using various Poincaré maps. In addition, a number of bifurcation diagrams and phase diagrams are examined as well as the correlation between MSM characteristics and DSR. The study reveals that as the meshing frequency increases, the system transitions from stable periodic motion to complex periodic and chaotic responses before stabilizing into periodic motion. Transmission errors significantly influence MSM characteristics, with smaller errors making the DSR more sensitive to bifurcations and phase trajectory changes. Increased damping improves stability by suppressing BSM and chaotic motion. Under varying loads, the system transitions through different dynamic states, with periodic jumps notably affecting DSR at higher loads. Additionally, backlash plays a critical role in MSM behavior, influencing the transitions between periodic and chaotic responses. These findings highlight the importance of optimizing damping, load, and backlash to enhance the motion stability and performance of herringbone gear systems.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105909"},"PeriodicalIF":4.5,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A generalized method for C3 continuous toolpath planning and its application in robot machining

IF 4.5 1区工程技术

Mechanism and Machine Theory Pub Date : 2025-01-04 DOI: 10.1016/j.mechmachtheory.2024.105911

Guangxi Li , Haitao Liu , Qi Liu

{"title":"A generalized method for C3 continuous toolpath planning and its application in robot machining","authors":"Guangxi Li , Haitao Liu , Qi Liu","doi":"10.1016/j.mechmachtheory.2024.105911","DOIUrl":"10.1016/j.mechmachtheory.2024.105911","url":null,"abstract":"<div><div>High-order parametric continuity in toolpath generation and smooth passage through singular regions are paramount in five-axis machining. This paper introduces a generalized method for toolpath planning of a 5-DOF machining robot, which encompasses a two-pronged strategy: a toolpath smoothing technique and a singularity avoidance strategy. Initially, the control points of smoothing B-splines are analytically derived using curvature derivative continuity criteria for both linear and arc path segments. On this basis, an effective corner smoothing method, which is capable of addressing the line-line, line-arc, and arc-arc pairs, is developed for the tool position path, and a specialized approach similar to spatial arc-arc pair smoothing is employed for the tool orientation path. Subsequently, an analytical parameter synchronization technique is applied to generate a C<sup>3</sup> continuous toolpath. A real-time singularity avoidance strategy is then proposed to improve the toolpath continuity near the singular configuration of the machining equipment. The effectiveness of the proposed method is verified through simulations and experiments on a robot machining platform, with the integration of a jerk-continuous feedrate profile. The findings indicate that the equipment can operate effectively throughout its entire workspace thanks to the proposed toolpath planning method.</div></div>","PeriodicalId":49845,"journal":{"name":"Mechanism and Machine Theory","volume":"206 ","pages":"Article 105911"},"PeriodicalIF":4.5,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0