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学者姓名：陈东菊
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摘要 ：
The aerostatic spindle often occur offset and additional vibration under the action of external load due to the low stiffness, thus affecting the rotary accuracy of the spindle. In order to solve the problem of unbalanced vibration of the spindle, a new type of controllable radial aerostatic bearing is designed by combining piezoelectric ceramics. A bearing-rotor-piezoelectric ceramic coupling model was established, and the control method of variable structure sliding mode control was used to reduce the vibration amplitude due to the unbalance. From the results of simulation and experiment, it is found that when the disturbance is taken as a constant value, the vibration amplitude increases with the increase of force; when the disturbance force is an unknown random force, the control effect is slightly worse than that when the disturbance force is known, but the rotary accuracy can be improved by this suppression effect on the aerostatic spindle. Finally, the correctness and effectiveness of this control method are proved through experiments.
关键词 ：
Vibration Vibration Vibration suppression Vibration suppression Piezoelectric ceramics Piezoelectric ceramics Aerostatic spindle Aerostatic spindle Variable structure sliding mode Variable structure sliding mode
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| GB/T 7714 | Chen, Dongju , Wang, Handong , Xie, Yinhui et al. Regulating the vibration of aerostatic journal spindle based on piezoelectric ceramics [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2023 , 85 : 1-8 . |
| MLA | Chen, Dongju et al. "Regulating the vibration of aerostatic journal spindle based on piezoelectric ceramics" . | JOURNAL OF MANUFACTURING PROCESSES 85 (2023) : 1-8 . |
| APA | Chen, Dongju , Wang, Handong , Xie, Yinhui , Liang, Dong . Regulating the vibration of aerostatic journal spindle based on piezoelectric ceramics . | JOURNAL OF MANUFACTURING PROCESSES , 2023 , 85 , 1-8 . |
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摘要 ：
Selective laser melting (SLM) provides a great degree of design freedom, but because the forming process is accompanied by multi-scale and multi-physics phenomena, the computational cost of modelling the forming process remains quite high. The cost of testing and simulation can be reduced by creating a model based on a nonlinear system, fitting the nonlinear function between input and output, and choosing the best option for forming quality. In this study, a nonlinear system was created by integrating data mining and statistical inference technologies, and a mix of simulation and experiment was utilized to create a specimen with the desired properties. Firstly, the density of 316L stainless steel specimens formed by SLM with various layer thicknesses was obtained, the important parameters impacting density were examined, and the effect of layer thickness on specimen density was reported. Furthermore, the nonlinear neural network optimization system was built through training and testing in order for the trained network to forecast the nonlinear function's output. Finally, the system is utilized to forecast density in high-efficiency moulding mode, and the test results match the anticipated data well.
关键词 ：
Neural network Neural network Relative density Relative density Selected laser melting Selected laser melting Nonlinear system Nonlinear system Data-drive Data-drive
引用：
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| GB/T 7714 | Chen, Dongju , Wang, Peng , Pan, Ri et al. Process optimization of selective laser melting 316L stainless steel by a data-driven nonlinear system [J]. | WELDING IN THE WORLD , 2022 , 66 (3) : 409-422 . |
| MLA | Chen, Dongju et al. "Process optimization of selective laser melting 316L stainless steel by a data-driven nonlinear system" . | WELDING IN THE WORLD 66 . 3 (2022) : 409-422 . |
| APA | Chen, Dongju , Wang, Peng , Pan, Ri , Zha, Chunqing , Fan, Jinwei , Li, Shupei et al. Process optimization of selective laser melting 316L stainless steel by a data-driven nonlinear system . | WELDING IN THE WORLD , 2022 , 66 (3) , 409-422 . |
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摘要 ：
不同型腔对空气静压轴承性能的影响
关键词 ：
气膜波动 气膜波动 加工精度 加工精度 空气静压轴承 空气静压轴承 气旋现象 气旋现象
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| GB/T 7714 | 陈东菊 , 程锴 , 董丽华 et al. 不同型腔对空气静压轴承性能的影响 [J]. | 陈东菊 , 2021 , (5) : 128-133 . |
| MLA | 陈东菊 et al. "不同型腔对空气静压轴承性能的影响" . | 陈东菊 5 (2021) : 128-133 . |
| APA | 陈东菊 , 程锴 , 董丽华 , 潘日 , 范晋伟 , 制造技术与机床 . 不同型腔对空气静压轴承性能的影响 . | 陈东菊 , 2021 , (5) , 128-133 . |
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摘要 ：
针对气浮工作台运行中出现的气膜波动问题,研究空气静压轴承的不同气腔结构形状对气膜内气旋及气膜波动的影响。通过结合承载力和刚度等性能参数,对有限元仿真不同形状气腔的结果对比分析,得到矩形气腔刚度最大,但同时气旋现象严重,圆台气腔能有效抑制气旋现象。这些分析通过改变轴承的结构参数抑制空气静压轴承的气旋及气膜波动,为提高气浮工作台的加工精度和稳定性提供理论依据。
关键词 ：
气旋现象 气旋现象 气膜波动 气膜波动 加工精度 加工精度 空气静压轴承 空气静压轴承
引用：
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| GB/T 7714 | 陈东菊 , 程锴 , 董丽华 et al. 不同型腔对空气静压轴承性能的影响 [J]. | 制造技术与机床 , 2021 , (05) : 128-133 . |
| MLA | 陈东菊 et al. "不同型腔对空气静压轴承性能的影响" . | 制造技术与机床 05 (2021) : 128-133 . |
| APA | 陈东菊 , 程锴 , 董丽华 , 潘日 , 范晋伟 . 不同型腔对空气静压轴承性能的影响 . | 制造技术与机床 , 2021 , (05) , 128-133 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In order to study the influence mechanism of the motion accuracy of the air static pressure guide system, this article combines the internal transmission law of the driving part of the table and the coupling analysis of solid damping and micro-scale gas damping and establishes the stepping motor, ball screw, nut, and motion table. The four-degree-of-freedom operation model was used to study the response simulation and dynamic characteristics of the entire table under the influence of various components. Combined with the damping characteristics extracted from the experiment, the influence mechanism of micro-gap solids and gas damping on the motion accuracy of the air-floating table is analyzed, and the optimal structural scheme that can effectively improve the accuracy and stability is proposed to improve the performance of the air-floating table and ultra-precision machine tools, processing accuracy to solve key technical problems in improving nano-machining accuracy.
关键词 ：
dynamic and static characteristics dynamic and static characteristics vibration response vibration response Aerostatic guideway Aerostatic guideway solid-gas damping solid-gas damping squeeze film damping squeeze film damping
引用：
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| GB/T 7714 | Chen, Dongju , Liang, Dong , Zha, Chunqing . Effect of solid-gas damping on dynamic characteristics of aerostatic guideway [J]. | JOURNAL OF VIBRATION AND CONTROL , 2021 . |
| MLA | Chen, Dongju et al. "Effect of solid-gas damping on dynamic characteristics of aerostatic guideway" . | JOURNAL OF VIBRATION AND CONTROL (2021) . |
| APA | Chen, Dongju , Liang, Dong , Zha, Chunqing . Effect of solid-gas damping on dynamic characteristics of aerostatic guideway . | JOURNAL OF VIBRATION AND CONTROL , 2021 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种针对选区激光熔化的温度在线检测调控系统，设有1个打印调控系统、1个CCD测温系统、1个CCD测温系统运动装置和1个PC机；所述的CCD测温系统被固定在CCD测温系统运动装置上，CCD测温系统运动装置固定在打印系统的打印舱侧壁上，CCD测温系统运动装置、CCD测温系统、打印调控系统分别与PC机相连。PC机接收CCD测温系统的图片信息并且对图片信息进行处理检测，基于检测结果对打印调控系统进行调节，达到最终温度调控的目的。
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| GB/T 7714 | 陈东菊 , 孔帅 , 梁栋 et al. 一种针对选区激光熔化温度在线检测调控系统 : CN202110092951.6[P]. | 2021-01-25 . |
| MLA | 陈东菊 et al. "一种针对选区激光熔化温度在线检测调控系统" : CN202110092951.6. | 2021-01-25 . |
| APA | 陈东菊 , 孔帅 , 梁栋 , 赵优 , 李娜 , 曾志强 . 一种针对选区激光熔化温度在线检测调控系统 : CN202110092951.6. | 2021-01-25 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Robot-assisted bonnet polishing systems (RABPSs) have been widely studied in order to expand the application of bonnet polishing technology. Currently, low working stiffness is one of the most important problems that needs to be solved for RABPSs. To address this issue, an evaluation method for the working stiffness of RABPSs should be studied. Therefore, a theoretical and experimental study is presented in this paper. First, the static stiffness model of the RABPS was built based on the Denavit?Hartenberg (D?H) method and the compliance matrix. Subsequently, the force characteristics of the RABPS during the bonnet polishing process were analyzed. Next, by combining the above static stiffness model and the force analysis results, a new index, that is, the normal stiffness coefficient (NSC), was proposed to evaluate the working stiffness of the RABPS. Finally, the performance of the NSC of the RABPS was verified by simulation and experiment. Both results show that the NSC has higher accuracy than other commonly used indexes when it is used to describe the working stiffness of RABPSs. This research provides an important theoretical foundation for the optimization of the working stiffness of RABPSs for future studies.
关键词 ：
Normal stiffness coefficient Normal stiffness coefficient Working stiffness Working stiffness Bonnet polishing Bonnet polishing Industrial robot Industrial robot
引用：
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| GB/T 7714 | Pan, Ri , Zhao, Wanying , Wang, Zhenzhong et al. Research on an evaluation model for the working stiffness of a robot-assisted bonnet polishing system [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2021 , 65 : 134-143 . |
| MLA | Pan, Ri et al. "Research on an evaluation model for the working stiffness of a robot-assisted bonnet polishing system" . | JOURNAL OF MANUFACTURING PROCESSES 65 (2021) : 134-143 . |
| APA | Pan, Ri , Zhao, Wanying , Wang, Zhenzhong , Ji, Shuting , Gao, Xiangsheng , Chen, Dongju et al. Research on an evaluation model for the working stiffness of a robot-assisted bonnet polishing system . | JOURNAL OF MANUFACTURING PROCESSES , 2021 , 65 , 134-143 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
As an additive manufacturing technology, selective laser melting (SLM) can form any complex metal parts, which has unparalleled advantages compared to traditional processing methods. However, there are still some problems such as accuracy and non-repeatability to overcome to apply SLM to production practice. The high-precision monitoring and degradation feedback technology of SLM equipment is the future development direction. The real-time monitoring machine can repair itself and avoid the tedious detection in the post-processing stage. The researchers mainly monitor the quality of the forming process by molten pool signal, temperature signal, sound signal, and scanning track. The forming process is monitored using coaxial detection or paraxial detection through a high-speed camera, pyrometer, and other equipment. This paper can provide theoretical support for the SLM intelligent monitoring field. © 2021, The Author(s), under exclusive licence to Springer-Verlag London Ltd. part of Springer Nature.
关键词 ：
High speed cameras High speed cameras Melting Melting Processing Processing Selective laser melting Selective laser melting
引用：
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| GB/T 7714 | Chen, Dongju , Wang, Peng , Pan, Ri et al. Research on in situ monitoring of selective laser melting: a state of the art review [J]. | International Journal of Advanced Manufacturing Technology , 2021 , 113 (11-12) : 3121-3138 . |
| MLA | Chen, Dongju et al. "Research on in situ monitoring of selective laser melting: a state of the art review" . | International Journal of Advanced Manufacturing Technology 113 . 11-12 (2021) : 3121-3138 . |
| APA | Chen, Dongju , Wang, Peng , Pan, Ri , Zha, Chunqing , Fan, Jinwei , Kong, Shuai et al. Research on in situ monitoring of selective laser melting: a state of the art review . | International Journal of Advanced Manufacturing Technology , 2021 , 113 (11-12) , 3121-3138 . |
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摘要 ：
针对空气静压主轴气膜刚度不高,在工作中易受自身及外部激励的影响,从而产生不平衡振动的现象,设计了一种基于压电陶瓷的可控空气静压径向轴承,研究了压电陶瓷的相关特性.结合气体主轴建立了轴承-转子-压电陶瓷的耦合模型,并在此基础上建立了基于扩张观测器的滑模控制器,同时将压电陶瓷综合控制器串联其中,在限制条件内利用控制器使压电陶瓷挤压气膜为主轴提供有效的主动控制力,从而抑制空气静压主轴的振动.研究结果表明,利用压电陶瓷对空气静压主轴系统的振动进行抑制取得了良好的效果,对于主要控制点可使其振动位移减小99.17％,对于次要控制点均有不同程度的减振效果,最多可减少94.36％.
引用：
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| GB/T 7714 | 陈东菊 , 梁栋 , 赵优 et al. 基于压电陶瓷作用的气体主轴抑振研究 [J]. | 压电与声光 , 2021 , 43 (5) : 670-675 . |
| MLA | 陈东菊 et al. "基于压电陶瓷作用的气体主轴抑振研究" . | 压电与声光 43 . 5 (2021) : 670-675 . |
| APA | 陈东菊 , 梁栋 , 赵优 , 田汉青 . 基于压电陶瓷作用的气体主轴抑振研究 . | 压电与声光 , 2021 , 43 (5) , 670-675 . |
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摘要 ：
To improve the performance of a hydrostatic bearing, a method of constructing micro-textures on the inner surface of a bearing is proposed to increase the bearing capacity and reduce the friction coefficient. In this paper, the composite texture is innovatively proposed, and the theoretical models of hydrostatic radial bearings under four situations including non-texture, square, spherical, and composite textures are established. The effect of texture shapes and texture parameters on bearing performance is numerically studied and the influence level of various factors on bearing performance is evaluated innovatively using the cross-correlation analysis. The results show that the presence of a micro-texture can improve the bearing capacity and reduce the friction coefficient of the bearing compared with smooth surface bearings; the composite micro-texture increases the bearing capacity by about 9.5%, the stiffness increases by about 8.2%, and the friction coefficient is reduced by about 10.5%; there is an optimal micro-texture unit area ratio (between 30% and 40%) making the bearing capacity largest and the friction coefficient smallest; finally, the influence level of various factors on the bearing performance is evaluated. The relative depth of the texture has the greatest influence on it, followed by the number of textures, and finally the unit area ratio. The above results will provide a theoretical basis for the design of hydrostatic bearings with micro-textures.
关键词 ：
friction performance friction performance composite textures composite textures Hydrostatic bearing Hydrostatic bearing micro-texture micro-texture bearing capacity bearing capacity
引用：
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| GB/T 7714 | Chen, Dongju , Zhao, You , Zha, Chunqing et al. Performance evaluation of different types of micro-textured hydrostatic spindles under the main influencing factors [J]. | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY , 2021 , 235 (10) : 2169-2183 . |
| MLA | Chen, Dongju et al. "Performance evaluation of different types of micro-textured hydrostatic spindles under the main influencing factors" . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY 235 . 10 (2021) : 2169-2183 . |
| APA | Chen, Dongju , Zhao, You , Zha, Chunqing , Pan, Ri , Fan, Jinwei . Performance evaluation of different types of micro-textured hydrostatic spindles under the main influencing factors . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY , 2021 , 235 (10) , 2169-2183 . |
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