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学者姓名：赵京
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摘要 ：
介绍了模块化技术在工程装备、交通运输装备、武器作战装备等机械装备领域的应用.在此基础上,围绕功能、功能和结构、产品生命周期三类,对模块化设计方法进行了综述.现阶段,模块化装备的设计依然依赖于经验,设计方法存在着计算量庞大、主观因素强、全局与局部矛盾、缺乏特殊需求考虑等问题.该问题导致模块化装备的性能整体提升有限,难以推广应用.未来,相关性评估方法将逐渐完备客观,并逐渐形成一套完整的模块化设计理论体系,从而实现设计方法与模块化装备的研发全过程有机结合,满足模块化装备在典型领域的应用需求.
关键词 ：
模块划分 模块划分 设计方法 设计方法 模块化 模块化 相关性 相关性 机械装备 机械装备 聚类算法 聚类算法
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| GB/T 7714 | 赵京 , 张晓丹 , 张自强 et al. 模块化机械装备及其设计方法研究综述 [J]. | 华中科技大学学报(自然科学版) , 2021 , 49 (10) : 19-29 . |
| MLA | 赵京 et al. "模块化机械装备及其设计方法研究综述" . | 华中科技大学学报(自然科学版) 49 . 10 (2021) : 19-29 . |
| APA | 赵京 , 张晓丹 , 张自强 , 苗磊 . 模块化机械装备及其设计方法研究综述 . | 华中科技大学学报(自然科学版) , 2021 , 49 (10) , 19-29 . |
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摘要 ：
Diffuse correlation spectroscopy (DCS) is a noninvasive technique that derives blood flow information from measurements of the temporal intensity fluctuations of multiply scattered light. Blood flow index (BFI) and especially its variation was demonstrated to be approximately proportional to absolute blood flow. We investigated and assessed the utility of a long short-term memory (LSTM) architecture for quantification of BFI in DCS. Phantom and in vivo experiments were established to measure normalized intensity autocorrelation function data. Improved accuracy and faster computational time were gained by the proposed LSTM architecture. The results support the notion of using proposed LSTM architecture for quantification of BFI in DCS. This approach would be especially useful for continuous real-time monitoring of blood flow. (c) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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| GB/T 7714 | Li, Zhe , Ge, Qisi , Feng, Jinchao et al. Quantification of blood flow index in diffuse correlation spectroscopy using long short-term memory architecture [J]. | BIOMEDICAL OPTICS EXPRESS , 2021 , 12 (7) : 4131-4146 . |
| MLA | Li, Zhe et al. "Quantification of blood flow index in diffuse correlation spectroscopy using long short-term memory architecture" . | BIOMEDICAL OPTICS EXPRESS 12 . 7 (2021) : 4131-4146 . |
| APA | Li, Zhe , Ge, Qisi , Feng, Jinchao , Jia, Kebin , Zhao, Jing . Quantification of blood flow index in diffuse correlation spectroscopy using long short-term memory architecture . | BIOMEDICAL OPTICS EXPRESS , 2021 , 12 (7) , 4131-4146 . |
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摘要 ：
The existing kinematic synthesis of serial robots generally focuses on configurations with specified degrees-of-freedom (DOFs). This paper proposes a new generation method of configurations based on iteration concepts, defines the concept of a configuration tree, and establishes the tree-evolution kinematic synthesis framework. The configuration tree includes configurations with different DOFs, and the ‘tree’ reflects the configuration relationship. The objectives of this study are to research the performance distribution characteristics of the ‘tree’, develop the tree-evolution strategies, and propose a serial robot configuration model with hyperparameters. The study observed that many typical performances have a monotonic distribution on the ‘tree’. Based on the estimation concept, the tree-evolution strategies search for the required configurations with high efficiency. In the kinematic synthesis task of an eight-DOF robot, the efficiency of configuration classification is increased by at least 30%, and the efficiency of configuration optimisation is increased by 65%. Moreover, the calculation efficiency is improved further as the DOF increases. The example shows that the new method improves the calculation efficiency of the process of kinematic synthesis compared with that for the traditional method. © 2021 Elsevier Ltd
关键词 ：
Degrees of freedom (mechanics) Degrees of freedom (mechanics) Efficiency Efficiency Forestry Forestry Iterative methods Iterative methods Kinematics Kinematics Robots Robots
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| GB/T 7714 | Zhao, Jing , Wu, Tong , Zhang, Ziqiang et al. Tree-Evolution: A novel approach for kinematic synthesis of serial robots under performance constraints [J]. | Mechanism and Machine Theory , 2021 , 163 . |
| MLA | Zhao, Jing et al. "Tree-Evolution: A novel approach for kinematic synthesis of serial robots under performance constraints" . | Mechanism and Machine Theory 163 (2021) . |
| APA | Zhao, Jing , Wu, Tong , Zhang, Ziqiang , Li, Xiaohui , Liu, Weihui . Tree-Evolution: A novel approach for kinematic synthesis of serial robots under performance constraints . | Mechanism and Machine Theory , 2021 , 163 . |
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摘要 ：
The reuse of recycled aggregate concrete (RAC) is being researched all over the world and lots of works are focused on the notched specimen to study the crack path of RAC. A mathematical algorithm of RAC meshing was presented to explore the failure pattern in RAC. According to this algorithm, the interfacial transition zone can be defined to be an actual thickness at the micron level. Further, a new finite element method (FEM) on the complementary energy principle was introduced to simulate the mechanical behavior of RAC's mesostructure. The compliance matrix of the element with any shape can be calculated and expressed to be a uniform and explicit expression. Several numerical models of RAC were established, in which the effecting factors of the prenotch size, thickness of ITZ, and the distance from the prenotch to the aggregate were taken into account. Hereafter, these RAC models were subjected to uniaxial tension. The effect of the aforementioned factors on the crack path was simulated. The simulated data manifest that both the mesh mode of RAC and the FEM on complementary energy principle are effective approaches to explore the failure pattern of RAC. The size of the prenotch, thickness of ITZ, and distance from the prenotch to the recycled aggregate have a powerful influence on the path and distribution of the isolated crack, width and length of the crack path, and the shape and path of continuous cracks, respectively. Copyright © 2021 Yao Wang et al.
关键词 ：
Aggregates Aggregates Concrete aggregates Concrete aggregates Concretes Concretes Cracks Cracks Failure (mechanical) Failure (mechanical) Finite element method Finite element method Recycling Recycling
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| GB/T 7714 | Wang, Yao , Zong, Gang , Liu, Juan et al. Modeling the failure pattern of prenotched recycled aggregate concrete using FEM on complementary energy principle [J]. | Mathematical Problems in Engineering , 2021 , 2021 . |
| MLA | Wang, Yao et al. "Modeling the failure pattern of prenotched recycled aggregate concrete using FEM on complementary energy principle" . | Mathematical Problems in Engineering 2021 (2021) . |
| APA | Wang, Yao , Zong, Gang , Liu, Juan , Wu, Chunyang , Xu, Minyao , Zhao, Jing . Modeling the failure pattern of prenotched recycled aggregate concrete using FEM on complementary energy principle . | Mathematical Problems in Engineering , 2021 , 2021 . |
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摘要 ：
Serial robots provide an ideal alternative for friction stir welding of large-scale spatial curve welding seam due to their high flexibility and large workspace. However, the low stiffness of a serial robot will definitely affect its welding accuracy. In order to enhance the stiffness of the serial robot in completing friction stir welding tasks, this paper proposes a method of constructing the hybrid stiffness index. This method uses the sigmoid function to process the dexterity or joint limit index and applies it to the stiffness index as a weight coefficient. Then the soft stiffness index with dexterity constraint or joint limit constraint is constructed respectively, and these two hybrid stiffness indices have the same dimension as the stiffness index. Subsequently, the dimension synthesis of the ZK-500 serial robot is completed by maximizing the global soft stiffness index with dexterity constraint. Finally, based on the soft stiffness index with joint limit constraint, a joint trajectory planning algorithm for the ZK-500 robot and positioner system is proposed. The result of simulations shows that the soft stiffness index with a joint limit constraint can not only ensure the stiffness performance but also improve the smoothness of the joint trajectory in the robot trajectory planning task. © 2020 The Society of Manufacturing Engineers
关键词 ：
Friction Friction Friction stir welding Friction stir welding Research laboratories Research laboratories Robot programming Robot programming Robots Robots Seam welding Seam welding Stiffness Stiffness Trajectories Trajectories
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| GB/T 7714 | Zhao, Jing , Duan, Yaxing , Xie, Biyun et al. FSW robot system dimensional optimization and trajectory planning based on soft stiffness indices [J]. | Journal of Manufacturing Processes , 2021 , 63 : 88-97 . |
| MLA | Zhao, Jing et al. "FSW robot system dimensional optimization and trajectory planning based on soft stiffness indices" . | Journal of Manufacturing Processes 63 (2021) : 88-97 . |
| APA | Zhao, Jing , Duan, Yaxing , Xie, Biyun , Zhang, Ziqiang . FSW robot system dimensional optimization and trajectory planning based on soft stiffness indices . | Journal of Manufacturing Processes , 2021 , 63 , 88-97 . |
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摘要 ：
To improve rescue efficiency, a multi-function rescue attachment with tonging, shearing and grasping functions was designed by the authors in a previous study. In this paper, the reliability and reliability sensitivity of this rescue attachment are researched. Three rescue attachment failure modes are analyzed and limit state equations are established for the three failure modes. To consider the complex and nonlinear correlations among these failure modes, a method to analyze the reliability and sensitivity to reliability of the failure modes based on a hybrid copula model is proposed. The Clayton copula, Gumbel copula and Frank copula, which exhibit upper tail dependence, lower tail dependence, and upper and lower tail independence, respectively, are selected to construct the hybrid copula model to describe the complex correlations among multiple failure modes. The weight coefficients and parameters of the hybrid copula model are then estimated using the Bayesian model weighted average method and the minimum square deviation criterion. A method to calculate the sensitivity of the failure correlations to the reliability is then deduced using the moment method to improve the computational efficiency. Two examples show that the proposed method can improve computational efficiency significantly and the calculation results were consistent with those realized using the Monte Carlo (MC) method, but required fewer samples. Finally, the reliability and reliability sensitivity of the rescue attachment are analyzed using the proposed method and MC method. The effectiveness and efficiency of the proposed method are proved, and strategies to improve the rescue attachment’s reliability are determined. © 2021, The Brazilian Society of Mechanical Sciences and Engineering.
关键词 ：
Bayesian networks Bayesian networks Computational efficiency Computational efficiency Efficiency Efficiency Equations of state Equations of state Failure modes Failure modes Method of moments Method of moments Monte Carlo methods Monte Carlo methods
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| GB/T 7714 | Wang, Chunrong , Zhao, Jing , Xia, Erdong et al. Analyzing reliability and sensitivity to reliability of rescue attachment with multiple failure modes [J]. | Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2021 , 43 (4) . |
| MLA | Wang, Chunrong et al. "Analyzing reliability and sensitivity to reliability of rescue attachment with multiple failure modes" . | Journal of the Brazilian Society of Mechanical Sciences and Engineering 43 . 4 (2021) . |
| APA | Wang, Chunrong , Zhao, Jing , Xia, Erdong , Gao, Hao . Analyzing reliability and sensitivity to reliability of rescue attachment with multiple failure modes . | Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2021 , 43 (4) . |
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摘要 ：
The adhered mortar attached on the surface of recycled aggregate is the primary difference between recycled aggregate and natural aggregate, and is the major reason for reducing its mechanical properties. To measure the percentage of adhered mortar, an image analysis method (IAM) was presented. First, three comparative specimens were conducted to demonstrate the precision and efficiency of IAM. Further, the actual adhered mortar content was also studied by the heating and cooling method. Then, the effect of recycled aggregate size on the percentage of adhered mortar, and the characteristic of recycled aggregate was explored by IAM. In addition, the type and optimal size of recycled aggregate were also investigated. The obtained data indicated that IAM is an accurate and efficient method to measure the proportion of adhered mortar or other phases; the highest content of adhered mortar was found in recycled aggregate with a size of 10.0-16.0 mm, up to 39.39%; the percentage of the recycled aggregates with a particle size between 16.0 and 20.0 mm should be increased in the mix proportion, which has less adhered mortar content and higher quality recycled aggregate content.
关键词 ：
Adhered mortar Adhered mortar Characteristic of recycled aggregate Characteristic of recycled aggregate Image analysis method (IAM) Image analysis method (IAM) Recycled aggregate Recycled aggregate
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| GB/T 7714 | Wang, Yao , Liu, Juan , Zhu, Pinghua et al. Investigation of Adhered Mortar Content on Recycled Aggregate Using Image Analysis Method [J]. | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2021 , 33 (9) . |
| MLA | Wang, Yao et al. "Investigation of Adhered Mortar Content on Recycled Aggregate Using Image Analysis Method" . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING 33 . 9 (2021) . |
| APA | Wang, Yao , Liu, Juan , Zhu, Pinghua , Liu, Hui , Wu, Chunyang , Zhao, Jing . Investigation of Adhered Mortar Content on Recycled Aggregate Using Image Analysis Method . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2021 , 33 (9) . |
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摘要 ：
The rigid-flexible coupling structure of creatures with jumping ability has the advantages of high stiffness and good flexibility, which are of great significance to its research. However, existing research on jumping robots has not demonstrated the effect of multiflexibility links on the jumping performance. In this paper, a Watt-type one degree-of-freedom six-bar mechanism is regarded as research object. For a jumping leg including multiple flexible links and a flexible joint with a floating frame, a rigid-flexible coupling dynamic model is established with a pseudo-rigid-body model being used. On this basis, the effect of structural and installation parameters on the jumping performance is analyzed. Results show that different flexible links have distinct effects on the jumping performance, and properly reducing the stiffness of flexible links can improve the jumping performance. The results of this study provide a design basis for jumping robots with a rigid-flexible coupling structure.
关键词 ：
Bioinspired jumping robot Bioinspired jumping robot One-DOF mechanism One-DOF mechanism Performance analysis Performance analysis Rigid-flexible coupling dynamic model Rigid-flexible coupling dynamic model
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| GB/T 7714 | Zhang, Ziqiang , Wang, Lun , Liao, Jinnong et al. Rigid-flexible coupling dynamic modeling and performance analysis of a bioinspired jumping robot with a six-bar leg mechanism [J]. | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY , 2021 , 35 (8) : 3675-3691 . |
| MLA | Zhang, Ziqiang et al. "Rigid-flexible coupling dynamic modeling and performance analysis of a bioinspired jumping robot with a six-bar leg mechanism" . | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 35 . 8 (2021) : 3675-3691 . |
| APA | Zhang, Ziqiang , Wang, Lun , Liao, Jinnong , Zhao, Jing , Yang, Qi . Rigid-flexible coupling dynamic modeling and performance analysis of a bioinspired jumping robot with a six-bar leg mechanism . | JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY , 2021 , 35 (8) , 3675-3691 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Bio-inspired jumping robots should achieve stable jumping in field environment. Robots easily lose stability because of the complex terrain and large speed change. Lateral jumping of the robot with four-bar jumping legs under rugged terrain was used as the research object, and a method to achieve good dynamic stability by adjusting the leg attitudes of the robot was proposed. The stability criteria were proposed hierarchically on the basis of the analysis of the jumping mechanism of creatures. Then, the dynamic model of the robot jumping on the slope was established, and the effect of different parameters on dynamic stability was analyzed to carry out the primary selection of parameters. Then, the method of maintaining dynamic stability was proposed. On the basis of ensuring large motion distances and stable driving torques, leg attitudes were considered the optimization parameters. Thus, the robot does not overturn or turn over uncontrollably in the take-off, buffering, and flight phases. Analysis results of robot jumping in plane and 3D space under different terrains prove the feasibility of this method. In particular, the dynamic stability of the robot is better if the take-off direction is considered an optimization parameter. The simulation results also proved the accuracy of the analysis results. The research results provide a theoretical basis to realize stable continuous jumping of bio-inspired biped robots. © 2021
关键词 ：
Biomimetics Biomimetics Landforms Landforms Robots Robots Slope stability Slope stability Stability criteria Stability criteria
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| GB/T 7714 | Zhang, Ziqiang , Wang, Lun , Liao, Jinnong et al. Dynamic stability of bio-inspired biped robots for lateral jumping in rugged terrain [J]. | Applied Mathematical Modelling , 2021 , 97 : 113-137 . |
| MLA | Zhang, Ziqiang et al. "Dynamic stability of bio-inspired biped robots for lateral jumping in rugged terrain" . | Applied Mathematical Modelling 97 (2021) : 113-137 . |
| APA | Zhang, Ziqiang , Wang, Lun , Liao, Jinnong , Zhao, Jing , Zhou, Zhenyong , Liu, Xingkun . Dynamic stability of bio-inspired biped robots for lateral jumping in rugged terrain . | Applied Mathematical Modelling , 2021 , 97 , 113-137 . |
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摘要 ：
单自由度八杆仿生机构杆长参数较多,是仿生机器人领域研究的难点之一。为提高设计效率,提出一种构型与尺度同步设计方法。在选定的运动链和机架的基础上,以不等式形式分步给出运动可行性及外形约束条件,使得上一步的杆长可作为下一步求解的已知值。通过该过程,在得到八杆仿生机构构型的同时,快速得到所有杆长的初步可行域。循环上述过程,逐步缩小约束条件的范围,可使得八杆机构的杆长快速接近目标值。在此基础上,分类讨论了连杆搭接顺序、约束条件及基本运动链的差异对求解难度及构型结果的影响。利用所提出的单自由度八杆仿生机构的设计方法,在对初始条件进行合理选取的前提下,可在初步得到构型的同时将杆长限定在较小范围内,实现了构...
关键词 ：
单自由度 单自由度 构型与尺度一体化 构型与尺度一体化 设计方法 设计方法 仿生机构 仿生机构 八杆机构 八杆机构
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| GB/T 7714 | 张自强 , 廖金秾 , 赵京 et al. 单自由度八杆仿生机构构型与尺度同步设计方法 [J]. | 机械工程学报 , 2020 , 56 (23) : 58-66 . |
| MLA | 张自强 et al. "单自由度八杆仿生机构构型与尺度同步设计方法" . | 机械工程学报 56 . 23 (2020) : 58-66 . |
| APA | 张自强 , 廖金秾 , 赵京 , 王伦 . 单自由度八杆仿生机构构型与尺度同步设计方法 . | 机械工程学报 , 2020 , 56 (23) , 58-66 . |
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