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学者姓名：张俊
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Abstract ：
Auxetic materials, a type of mechanical metamaterial with negative Poisson's ratio, are potentially utilized in the realms of energy absorption and engineering structures. However, most of the existing auxetic materials either contain a large amount of rotational motion or still have gaps when fully folded, which is not conducive to lifting loads. Besides, their application is limited to flexible environments due to their single-folding mode. To overcome such limitations, a fully foldable mechanical metamaterial with isotropic auxeticity is proposed by utilizing the Sarrus mechanism, and a derivative multi-mode folding form is obtained in this paper. Then, the degrees-of-freedom (DOF), bistability, and kinematic characterizations are analyzed to show the performance of the proposed structures. Finally, the parameters of the proposed fully foldable mechanical metamaterials are discussed to simplify the structures. Some prototypes are fabricated to validate the effectiveness and performance of the proposed mechanical metamaterials. The proposed mechanical metamaterials have some merits, such as isotropic auxeticity, being fully folded to achieve dense compression, being bistable with load-bearing capacity, multi-mode folding form, and single-DOF, and they have versatile potential applications in complex environments requiring large deformation and flexible adaptation.
Keyword ：
auxetic property auxetic property mechanical metamaterials mechanical metamaterials mechanisms and robots mechanisms and robots mechanism synthesis and analysis mechanism synthesis and analysis multi-mode folding form multi-mode folding form negative Poisson's ratio negative Poisson's ratio Sarrus mechanism Sarrus mechanism single-DOF single-DOF theoretical and computational kinematics theoretical and computational kinematics
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| GB/T 7714 | Li, Lin , Yang, Feiyu , Yang, Fufu et al. Fully Foldable Mechanical Metamaterials With Isotropic Auxeticity and Its Generated Multi-Mode Folding Form [J]. | JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME , 2025 , 17 (5) . |
| MLA | Li, Lin et al. "Fully Foldable Mechanical Metamaterials With Isotropic Auxeticity and Its Generated Multi-Mode Folding Form" . | JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME 17 . 5 (2025) . |
| APA | Li, Lin , Yang, Feiyu , Yang, Fufu , Lin, Rongfu , Zhang, Jun . Fully Foldable Mechanical Metamaterials With Isotropic Auxeticity and Its Generated Multi-Mode Folding Form . | JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME , 2025 , 17 (5) . |
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PurposeElastohydrodynamic lubrication (EHL) plays a crucial role in high-speed and heavy-duty gear transmission systems, exerting significant influence on efficiency, vibration, noise and service life. This study aims to investigate the dynamic response of gear transmission systems under EHL operating conditions.Design/methodology/approachAn analytical methodology is proposed to investigate the influence of lubricating oil parameters on dynamic transmission error (DTE), dynamic meshing force (DMF) and vibration velocity of a planetary gearbox. Herein, the oil film pressure and thickness are calculated by the relaxation iterative method to couple the EHL model with the dynamic model of the planetary transmission system.FindingsThe results show that the DTE decreases significantly, and the vibration amplitude of DMF and vibration velocity also show notable reductions when considering the effect of EHL. In addition, with an increase in oil viscosity, the comprehensive stiffness decreases, while the oil film damping in the single-tooth meshing region increases significantly. This leads to an increase in the peak-to-peak value of DMF and has a greater impact on single-double-tooth alternating meshing.Originality/valueThis research better reveals the lubrication-induced vibration mechanism, which can provide a dynamic theoretical basis for the vibration control and life prediction of the planetary gearbox.Peer reviewThe peer review history for this article is available at: Link to the cited article.
Keyword ：
Dynamic modeling Dynamic modeling Dynamic response Dynamic response Elastohydrodynamic lubrication Elastohydrodynamic lubrication Planetary gearbox Planetary gearbox Time-varying mesh stiffness Time-varying mesh stiffness
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| GB/T 7714 | Wang, Jian , Lu, Yu , Fang, Han Liang et al. Dynamic modeling and analysis of planetary gearbox incorporating the effect of elastohydrodynamic lubrication [J]. | INDUSTRIAL LUBRICATION AND TRIBOLOGY , 2025 . |
| MLA | Wang, Jian et al. "Dynamic modeling and analysis of planetary gearbox incorporating the effect of elastohydrodynamic lubrication" . | INDUSTRIAL LUBRICATION AND TRIBOLOGY (2025) . |
| APA | Wang, Jian , Lu, Yu , Fang, Han Liang , Zhang, Jun . Dynamic modeling and analysis of planetary gearbox incorporating the effect of elastohydrodynamic lubrication . | INDUSTRIAL LUBRICATION AND TRIBOLOGY , 2025 . |
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Redundantly actuated parallel manipulator (RAPM) has been proved to have comparative advantages of higher rigidity and higher payload over other parallel manipulators. This paper is to establish a sufficient accurate stiffness modelling to evaluate the stiffness of the 2UPR-2RPS RAPM. Firstly, the structure of the 2UPR-2RPS RAPM is briefly introduced, followed by some necessary kinematic definitions. Next, a stiffness modelling of 2UPR-2RPS is established by including the compliances of all joints and limb structures. And a reasonable index is constructed to evaluate the stiffness of the 2UPR-2RPS RAPM. Finally, a set of stiffness experiments is carried out to verify the effectiveness of the proposed stiffness modelling of the 2UPR-2RPS. The results indicate that the relative errors between the proposed stiffness modelling and the experimental value are less than 6%. This indicates that the proposed stiffness modelling possesses sufficient accuracy and thus can be used to analyze the stiffness of the 2UPR-SRPS RAPM. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
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| GB/T 7714 | He, Zhen , Chen, Wenlong , Li, Yulu et al. Stiffness Modelling and Analysis of a Redundantly Actuated Parallel Manipulator [C] . 2025 : 715-729 . |
| MLA | He, Zhen et al. "Stiffness Modelling and Analysis of a Redundantly Actuated Parallel Manipulator" . (2025) : 715-729 . |
| APA | He, Zhen , Chen, Wenlong , Li, Yulu , Tang, Tengfei , Fang, Hanliang , Yang, Fufu et al. Stiffness Modelling and Analysis of a Redundantly Actuated Parallel Manipulator . (2025) : 715-729 . |
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To enhance the generalization capability of rotating machinery fault diagnosis, a novel generalized fault diagnosis framework is proposed. Phase entropy is introduced as a new method for measuring mechanical signal complexity. Furthermore, it is extended to refined time-shift multi-scale phase entropy. The extended method effectively captures dynamic characteristic information across multiple scales, providing a comprehensive reflection of the equipment's state. Based on signal amplitude, multiple time-shift multi-scale decomposition subsignals are constructed, and a scatter diagram is generated for each sub-signal. Subsequently, the diagram is partitioned into several regions, and the distribution probability of each region is calculated, enabling the extraction of stable and easily distinguishable features through the refined operation. Next, the one-versus-onebased twin support vector machine classifier is employed to achieve high-accuracy fault identification. Case analyses of a wind turbine, an aero-engine, a train transmission system, and an aero-bearing demonstrate that the accuracy, precision, recall, and F1 score of the proposed framework are over 99.51 %, 99.52 %, 99.51 %, and 99.51 %, respectively, using only five training samples per state. The proposed framework achieves higher accuracy compared to nine existing models via deep learning or machine learning. The aforementioned analysis results validate the accuracy and generalizability of the proposed framework.
Keyword ：
Fault diagnosis Fault diagnosis Phase entropy Phase entropy Rotating machinery Rotating machinery Twin support vector machine Twin support vector machine
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| GB/T 7714 | Wang, Zhenya , Zhang, Meng , Chen, Hui et al. A generalized fault diagnosis framework for rotating machinery based on phase entropy [J]. | RELIABILITY ENGINEERING & SYSTEM SAFETY , 2025 , 256 . |
| MLA | Wang, Zhenya et al. "A generalized fault diagnosis framework for rotating machinery based on phase entropy" . | RELIABILITY ENGINEERING & SYSTEM SAFETY 256 (2025) . |
| APA | Wang, Zhenya , Zhang, Meng , Chen, Hui , Li, Jinghu , Li, Gaosong , Zhao, Jingshan et al. A generalized fault diagnosis framework for rotating machinery based on phase entropy . | RELIABILITY ENGINEERING & SYSTEM SAFETY , 2025 , 256 . |
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Screw theory serves as an influential mathematical tool, significantly contributing to mechanical engineering, with particular relevance to mechanism science and robotics. The instantaneous screw and the finite displacement screw have been used to analyse the degree of freedom and perform kinematic analysis of linkage mechanisms with only lower pairs. However, they are not suitable for higher pair mechanisms, which can achieve complex motions with a more concise structure by reasonably designing contact contours, and they possess advantages in some particular areas. Therefore, to improve the adaptability of screw theory, this paper aims to analyse higher kinematic pair (HKP) mechanisms and proposes a method to extend instantaneous screw and finite displacement screw theory. This method can not only analyse the instantaneous degree of freedom of HKP mechanisms but also determine the relationships between the motion variables of HKP mechanisms. Furthermore, this method is applied to calculate the degree of freedom and the relationships between the motion angles in both planar and spatial cam mechanisms, thereby demonstrating its efficiency and advantages.
Keyword ：
degree of freedom degree of freedom finite screw theory finite screw theory higher kinematic pair mechanisms higher kinematic pair mechanisms kinematics kinematics screw theory screw theory
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| GB/T 7714 | Guo, Ruyi , Wang, Jiangyan , Hu, Houhua et al. Extending screw theory for analysing mechanisms incorporating higher kinematic pairs [J]. | ROBOTICA , 2025 , 43 (5) : 1841-1866 . |
| MLA | Guo, Ruyi et al. "Extending screw theory for analysing mechanisms incorporating higher kinematic pairs" . | ROBOTICA 43 . 5 (2025) : 1841-1866 . |
| APA | Guo, Ruyi , Wang, Jiangyan , Hu, Houhua , Zhang, Jun , Yang, Fufu . Extending screw theory for analysing mechanisms incorporating higher kinematic pairs . | ROBOTICA , 2025 , 43 (5) , 1841-1866 . |
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Aero-engines, pumps, and trains are widely used in transportation, maritime, aerospace, and other industries. However, these devices often operate in harsh and complex environments, making their internal components prone to failure. Thus, constructing a highly accurate fault diagnosis model is essential for ensuring the safe and reliable operation of machinery. However, most existing models require many labeled samples to build accurate training models, which is both expensive and difficult to achieve. Moreover, some models lack adaptability and often require adjustments to their structure or hyperparameters to suit new diagnostic tasks. To address these challenges, this paper proposes a few-shot fault diagnosis model based on multi-scale perception multi-level feature fusion image quadrant entropy (MPMFFIQE). The MPMFFIQE method uses the gramian angle summation field (GASF) to convert transient signals into images, preserving more detailed information about the mechanical state. The multi-scale perception multi-level feature strategy is then applied to sequentially enlarge and reconstruct feature maps at various levels, maximizing the extraction of fault-related information. Afterward, the fusion image quadrant entropy technique is proposed to combine nonlinear dynamic features from these feature maps, forming the mechanical MPMFFIQE feature set. Finally, this set is input into the harris hawks optimization support vector machine (HHOSVM) classifier to achieve fault identification. Results from three real-world case studies demonstrate that the proposed MPMFFIQE method improves accuracy by up to 12.90% in comparison with six feature extraction techniques. Furthermore, the proposed model achieves an accuracy rate exceeding 98.10% with just five training samples per state, representing up to a 27.48% improvement over six existing models. These findings confirm that the developed model can effectively and accurately diagnose mechanical faults in industrial applications using only a small number of training samples. Additionally, the model shows strong generalization across different mechanical equipment, highlighting its significant practical value. © 2024 Elsevier Ltd
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| GB/T 7714 | Wang, Zhenya , Liang, Pan , Bai, Rengui et al. Few-shot fault diagnosis for machinery using multi-scale perception multi-level feature fusion image quadrant entropy [J]. | Advanced Engineering Informatics , 2025 , 63 . |
| MLA | Wang, Zhenya et al. "Few-shot fault diagnosis for machinery using multi-scale perception multi-level feature fusion image quadrant entropy" . | Advanced Engineering Informatics 63 (2025) . |
| APA | Wang, Zhenya , Liang, Pan , Bai, Rengui , Liu, Yaming , Zhao, Jingshan , Yao, Ligang et al. Few-shot fault diagnosis for machinery using multi-scale perception multi-level feature fusion image quadrant entropy . | Advanced Engineering Informatics , 2025 , 63 . |
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Deployable structures based on rigid mechanisms are unconventional structures that can achieve transformations from compact folded states to fully deployed surfaces. The mechanisms are of very low or even single mobility, making the deployment process simpler. Such structures have found significant applications across various fields such as architecture, aerospace engineering, and robotics. Currently, the constituent mechanisms of these structures often come with symmetric geometric conditions, thereby yielding symmetric contours. However, this symmetry requirement makes it less desirable for specific scenarios where more generalised shapes are required. To fill the gap, this paper introduces two novel asymmetric deployable structures whose outlines can be arbitrary triangles based on the Wohlhart 6R linkage. The first structure is made from rod links, capable of transforming between two plane-like states. The second one is a modified version that incorporates rigid panels of uniform thickness as links, which can be folded from a long triangular prism to a shorter one. Their kinematic behaviours are analyzed in detail and validated by physical prototypes. We have also identified viable approaches to tessellating both structures into networks for large-scale applications. This work lays a crucial step towards the construction of asymmetric deployable structures with generalised contours. © 2025 Elsevier Ltd
Keyword ：
Aerospace applications Aerospace applications Aircraft Aircraft Aviation Aviation Kinematics Kinematics Robot applications Robot applications Spacecraft Spacecraft
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| GB/T 7714 | Zhou, Runjin , Yang, Yuchen , Liu, Chenying et al. Wohlhart 6R linkage-based asymmetric deployable structures with generalised contours [J]. | International Journal of Solids and Structures , 2025 , 317 . |
| MLA | Zhou, Runjin et al. "Wohlhart 6R linkage-based asymmetric deployable structures with generalised contours" . | International Journal of Solids and Structures 317 (2025) . |
| APA | Zhou, Runjin , Yang, Yuchen , Liu, Chenying , Guo, Ruyi , Hu, Houhua , Zhang, Jun et al. Wohlhart 6R linkage-based asymmetric deployable structures with generalised contours . | International Journal of Solids and Structures , 2025 , 317 . |
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Due to the merits of high flexibility, great pulling force, and light weight, the pneumatic muscle (PM) is applied to realize the flexible driving control commonly. However, the inherent asymmetric hysteresis nonlinear characteristics affect its control accuracy seriously and tradition generalized Bouc-Wen (GBW) model and its variants cannot characterize the hysteresis of PM effectively. A novel improved generalized Bouc-Wen (IGBW) model is proposed based on the concave convex features of the PM hysteresis curve. The parameter identification effects of Levenberg-Marquardt algorithm (LM), gradient descent method, Newton iteration method, differential evolution algorithm (DE), particle swarm optimization algorithm (PSO), and genetic algorithm (GA) on the IGBW model are studied firstly. Then, the modeling capacity of IGBW model is checked by contrasting the modeling accuracy and identification efficiency of IGBW and modified symmetrical generalized Prandtl-Ishlinskii (MSGPI) models. Finally, the hysteresis compensation control strategy is designed based on the inverse model of IGBW, and its stability is analyzed. The experimental results manifest that the LM algorithm is much better than the other five estimation methods with regard to computational efficiency and identification accuracy. The IGBW model can illustrate the asymmetric hysteresis properties of PM with higher accuracy and efficiency, and the control behavior is ameliorated significantly after using the IGBW model.
Keyword ：
Hysteresis characteristic Hysteresis characteristic Hysteresis compensation Hysteresis compensation improved generalized Bouc-Wen (IGBW) model improved generalized Bouc-Wen (IGBW) model Parameter identification Parameter identification pneumatic muscle (PM) pneumatic muscle (PM)
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| GB/T 7714 | Xie, Shenglong , Zhong, Haiming , Zhang, Jun et al. Modeling, identification, and compensation control of pneumatic muscle hysteresis based on an improved generalized Bouc-Wen model [J]. | MEASUREMENT , 2025 , 253 . |
| MLA | Xie, Shenglong et al. "Modeling, identification, and compensation control of pneumatic muscle hysteresis based on an improved generalized Bouc-Wen model" . | MEASUREMENT 253 (2025) . |
| APA | Xie, Shenglong , Zhong, Haiming , Zhang, Jun , Li, Yuntang , Xu, Su'an . Modeling, identification, and compensation control of pneumatic muscle hysteresis based on an improved generalized Bouc-Wen model . | MEASUREMENT , 2025 , 253 . |
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A 2PRU&1PRS - XY hybrid robot was proposed for the design requirements of robotie machining equipment for complex structural components. In order to apply the new hybrid robot to high-performance 5-axis machining, it is necessary to realize the dimensional design that takes into account the balanced optimization of multi kinematics performance. Therefore, in addition to analyzing the working space, motion/force transmission and dexterity indicators of hybrid robot, the difference index of transfer stability and accuracy was also proposed, and a scale design method based on the idea of multi-objective equilibrium optimization was designed. This method adopted standardized method to simplify the multiparameter design space, applied response surface methodology to improve the efficiency of solving complex functional functions, and the optimization solution efficiency was improved by the principal component analysis method. Combined with subjective and objective combinatorial empowerment method and TOPSIS-based Pareto frontier method, multi-index comprehensive performance scoring was carried out. Using the proposed method, four dimensional parameter design schemes were obtained that balanced optimization efficiency and multi-objective equilibrium optimization. The optimization design of the main dimensional parameters of the hybrid robot was achieved, providing designers with multi-objective equilibrium decision-making references with different engineering design preferences. © 2024 Chinese Society of Agricultural Machinery. All rights reserved.
Keyword ：
Decision making Decision making Efficiency Efficiency Industrial robots Industrial robots Kinematics Kinematics Machine design Machine design Multiobjective optimization Multiobjective optimization Principal component analysis Principal component analysis
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| GB/T 7714 | Tang, Tengfei , Shen, Yifeng , Ye, Wei et al. Dimensional Design of 2PRU&1PRS-XY Hybrid Robot Based on Multi-objective Equilibrium Optimization [J]. | Transactions of the Chinese Society for Agricultural Machinery , 2024 , 55 (4) : 440-451 . |
| MLA | Tang, Tengfei et al. "Dimensional Design of 2PRU&1PRS-XY Hybrid Robot Based on Multi-objective Equilibrium Optimization" . | Transactions of the Chinese Society for Agricultural Machinery 55 . 4 (2024) : 440-451 . |
| APA | Tang, Tengfei , Shen, Yifeng , Ye, Wei , Zhang, Jun . Dimensional Design of 2PRU&1PRS-XY Hybrid Robot Based on Multi-objective Equilibrium Optimization . | Transactions of the Chinese Society for Agricultural Machinery , 2024 , 55 (4) , 440-451 . |
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Compared to fixed-bottom wind turbines, offshore floating wind turbines (OFWTs) are subject to more prominent forced vibrations that require control measures. Considering the limited space within the nacelle, this paper proposed a novel methodology for designing a tuned mass dampers (TMD) installed inside the tower. To achieve an optimal design, a 4-degree-of-freedom simplify dynamic model is established to predict the vibration characteristics of spar OFWTs quickly and accurately. A new TMD configuration installed inside the tower is proposed to reduce the effect of space limitation and to determine the stroke limitation Based on the proposed methodology, the stiffness and damping of the TMD are designed and optimized, and then the detailed structural parameters are calculated. The comparison results show that, the proposed TMD achieves a maximum peak suppression rate of 90.67% in tower top fore-aft deformation power spectral density, which is 19.92% higher than that of the TMD designed by the formula method. The proposed TMD can effectively address the problem caused by the space limitation within nacelle, and provide superior vibration suppression for spar OFWTs.
Keyword ：
Offshore floating wind turbine Offshore floating wind turbine Simplified dynamic model Simplified dynamic model Stroke limitation Stroke limitation Tuned mass damper Tuned mass damper Vibration suppression Vibration suppression
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| GB/T 7714 | Lin, Jiahuan , Wang, Yangwei , Zhang, Guanchen et al. Novel tuned mass dampers installed inside tower of spar offshore floating wind turbines [J]. | OCEAN ENGINEERING , 2024 , 301 . |
| MLA | Lin, Jiahuan et al. "Novel tuned mass dampers installed inside tower of spar offshore floating wind turbines" . | OCEAN ENGINEERING 301 (2024) . |
| APA | Lin, Jiahuan , Wang, Yangwei , Zhang, Guanchen , Liu, Yuanchang , Zhang, Jun . Novel tuned mass dampers installed inside tower of spar offshore floating wind turbines . | OCEAN ENGINEERING , 2024 , 301 . |
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