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学者姓名：程强
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摘要 ：
An adaptive control strategy is developed for active degradation compensation of fuel cells, so as to improve output performance stability during long-time operation. Two groups of long-time tests of DMFC under different operating parameters are designed and implemented. The parameter adjustment significance that defines the adjusting priority is obtained from experimental analyses, based on which, the adaptive control strategy is developed and systematically tested. The results show that temporary degradation and permanent degradation for fuel cell performance could be differentiated in the process of performance degradation and recovery. The operation condition which would bring a higher energy conversion efficiency may lead to more serious degradations. The developed control strategy could help to adaptively alleviate fuel cell degradation during long-time operation. The temporary degradation and permanent degradation rates both decreased in daily operation, and the errors between output voltage and objective values are controlled within 2 %. The study provides an effective reference for improving the fuel cell stability during long-time operation and prolonging its service life. (c) 2021 Published by Elsevier Ltd.
关键词 ：
Adaptive control strategy Adaptive control strategy Degradation compensation Degradation compensation Energy conversion efficiency Energy conversion efficiency Parameter adjustment Parameter adjustment Stability Stability
引用：
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| GB/T 7714 | Yang, Qinwen , Gao, Bin , Cheng, Qiang et al. Adaptive control strategy for power output stability in long-time operation of fuel cells [J]. | ENERGY , 2022 , 238 . |
| MLA | Yang, Qinwen et al. "Adaptive control strategy for power output stability in long-time operation of fuel cells" . | ENERGY 238 (2022) . |
| APA | Yang, Qinwen , Gao, Bin , Cheng, Qiang , Xiao, Gang , Meng, Min . Adaptive control strategy for power output stability in long-time operation of fuel cells . | ENERGY , 2022 , 238 . |
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摘要 ：
机械制造训练是培养机械工程专业人才解决复杂工程问题能力的综合性实践训练环节.文章探讨在机械制造训练环节通过线上学习与线下实训相混合、虚拟仿真与实践加工相混合的双层混合式教学,并进行多阶段考核与多角度评价,实现对学生综合实践能力的培养并有利于这个教学环节的持续改进.
关键词 ：
混合式教学 混合式教学 机械制造训练 机械制造训练 虚拟仿真 虚拟仿真 考核评价方式 考核评价方式
引用：
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| GB/T 7714 | 初红艳 , 程强 , 刘志峰 et al. 机械制造训练线上线下混合式教学实践探索 [J]. | 大学教育 , 2021 , (4) : 89-92 . |
| MLA | 初红艳 et al. "机械制造训练线上线下混合式教学实践探索" . | 大学教育 4 (2021) : 89-92 . |
| APA | 初红艳 , 程强 , 刘志峰 , 赵永胜 , 杨聪彬 . 机械制造训练线上线下混合式教学实践探索 . | 大学教育 , 2021 , (4) , 89-92 . |
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摘要 ：
基于工程教育专业认证"产出导向"基本理念,以我校两次机械工程专业认证为契机,对机械工程专业实践教学体系进行了"6"模块重构,提出了以减速器为对象的机械工程专业"1+5+1"纵贯式实践教学模式.以培养学生实践动手能力和创新意识为目标,在夯实学生以绘图为"1"基本功的基础上,以减速器为对象纵贯式培养学生机电产品设计、制造、装配、检测、分析等"5"大核心技能,以及以团队管理与协作能力为"1"综合素质,培养学生解决复杂工程问题的能力及工程师素养.
引用：
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| GB/T 7714 | 程强 , 初红艳 , 杨聪彬 et al. 以减速器为对象的机械工程专业纵贯式实践教学改革 [J]. | 中国现代教育装备 , 2021 , (19) : 89-91,100 . |
| MLA | 程强 et al. "以减速器为对象的机械工程专业纵贯式实践教学改革" . | 中国现代教育装备 19 (2021) : 89-91,100 . |
| APA | 程强 , 初红艳 , 杨聪彬 , 刘志峰 , 张彩霞 . 以减速器为对象的机械工程专业纵贯式实践教学改革 . | 中国现代教育装备 , 2021 , (19) , 89-91,100 . |
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摘要 ：
盘形锻件等效应力分析及神经网络预测
关键词 ：
等效应力 等效应力 灰关联分析 灰关联分析 主成分分析法 主成分分析法 质量控制 质量控制 钛合金锻件 钛合金锻件 BP神经网络 BP神经网络
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 初红艳 , 赵凯林 , 程强 et al. 盘形锻件等效应力分析及神经网络预测 [J]. | 初红艳 , 2021 , 47 (2) : 103-111 . |
| MLA | 初红艳 et al. "盘形锻件等效应力分析及神经网络预测" . | 初红艳 47 . 2 (2021) : 103-111 . |
| APA | 初红艳 , 赵凯林 , 程强 , 北京工业大学学报 . 盘形锻件等效应力分析及神经网络预测 . | 初红艳 , 2021 , 47 (2) , 103-111 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
锻件等效应力对锻件质量有较大的影响,而实现其在锻造生产中的在线测量并进行综合评价较为困难.利用弹塑性有限元法对钛合金盘形锻件进行有限元仿真分析并进行了实验验证,分析了加载完成后等效应力的分布情况;利用灰关联分析方法对结果进行分析,结果表明坯料初始温度对锻件等效应力影响程度最大,室温影响最小.基于等效应力分布情况,利用主成分分析法建立应力综合评价模型,以坯料温度、模具温度、下压速度、室温、摩擦因数为输入层,应力综合评价值为输出层,建立了预测综合等效应力的反向传播(back propagation,BP)人工神经网络模型.结果表明BP神经网络的预测结果与实验所得结果较为一致,证明了建立的人工神经网...
关键词 ：
BP神经网络 BP神经网络 主成分分析法 主成分分析法 灰关联分析 灰关联分析 等效应力 等效应力 质量控制 质量控制 钛合金锻件 钛合金锻件
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 初红艳 , 赵凯林 , 程强 . 盘形锻件等效应力分析及神经网络预测 [J]. | 北京工业大学学报 , 2021 , 47 (02) : 103-111 . |
| MLA | 初红艳 et al. "盘形锻件等效应力分析及神经网络预测" . | 北京工业大学学报 47 . 02 (2021) : 103-111 . |
| APA | 初红艳 , 赵凯林 , 程强 . 盘形锻件等效应力分析及神经网络预测 . | 北京工业大学学报 , 2021 , 47 (02) , 103-111 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
机械制造训练线上线下混合式教学实践探索
关键词 ：
机械制造训练 机械制造训练 混合式教学 混合式教学 考核评价方式 考核评价方式 虚拟仿真 虚拟仿真
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 初红艳 , 程强 , 刘志峰 et al. 机械制造训练线上线下混合式教学实践探索 [J]. | 初红艳 , 2021 , (4) : 89-92 . |
| MLA | 初红艳 et al. "机械制造训练线上线下混合式教学实践探索" . | 初红艳 4 (2021) : 89-92 . |
| APA | 初红艳 , 程强 , 刘志峰 , 赵永胜 , 杨聪彬 , 大学教育 . 机械制造训练线上线下混合式教学实践探索 . | 初红艳 , 2021 , (4) , 89-92 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Bolted connections are widely used in the machine tool manufacturing and equipment. As it is well known, bolt preload will be attenuated by the vibration of machine tools, which will degenerate the working life of machine tools. In this paper, a new experimental design method is introduced into the study on bolt preload attenuation: the quadratic general rotary unitized design. The dynamic analysis of the bolted connection is carried out based on a finely fragmented numerical model to interpret the generation of fretting slip and the reason for the loosening of bolts. The alternating load cyclic vibration test, implemented on the bolted joints, can provide the vibration response under the influence of different working factors. Statistical test and analysis are performed on the quadratic regression mathematical model of the bolt preload attenuation, and the principal working factor that affecting the bolt preload attenuation under vibration can be obtained. Based on the analytical result, the combination of the working factors at the lowest bolt preload attenuation rate, which can effectively slow the bolt looseness, is investigated. The results of this study can provide an experimental basis for improving the machining stiffness of machine tools.
关键词 ：
Bolt preload attenuation Bolt preload attenuation Machine vibration Machine vibration Numerical simulation Numerical simulation Quadratic general rotary unitized design Quadratic general rotary unitized design Working factors Working factors
引用：
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| GB/T 7714 | Xu, Wenxiang , Cheng, Qiang , Yang, Congbin et al. Dynamic analysis and looseness evaluation of bolted connection under vibration of machine tools [J]. | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2021 . |
| MLA | Xu, Wenxiang et al. "Dynamic analysis and looseness evaluation of bolted connection under vibration of machine tools" . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2021) . |
| APA | Xu, Wenxiang , Cheng, Qiang , Yang, Congbin , Li, Ying . Dynamic analysis and looseness evaluation of bolted connection under vibration of machine tools . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2021 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The sliding-rolling mixed motion behavior degrades the ball screw's precision at different levels. Based on the sliding-rolling mixed motion between ball and screw/nut raceway, the ball screw's precision loss considering different given axial loading and rotational speed working conditions was investigated. Since creep and lubrication relate to sliding and rolling motion wear, the creep and lubrication characteristics are analyzed under different working conditions. Besides, the precision loss was calculated considering the sole influence of sliding behavior between ball and screw and compared with the results from other current models. Finally, research on precision loss owing to the sliding-rolling mixed motion behavior was realized under given working conditions, and suitable wear tests were carried out. The analytical results of precision loss are in good agreement with the experimental test conclusions, which is conducive to better predicting the law of precision loss in stable wear period.
关键词 ：
ball screw mechanism ball screw mechanism creep creep lubrication lubrication precision loss precision loss sliding-rolling mixed motion sliding-rolling mixed motion
引用：
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| GB/T 7714 | Qi, Bao-bao , Cheng, Qiang , Li, Shun-lei et al. Precision loss of ball screw mechanism under sliding-rolling mixed motion behavior [J]. | JOURNAL OF CENTRAL SOUTH UNIVERSITY , 2021 , 28 (5) : 1357-1376 . |
| MLA | Qi, Bao-bao et al. "Precision loss of ball screw mechanism under sliding-rolling mixed motion behavior" . | JOURNAL OF CENTRAL SOUTH UNIVERSITY 28 . 5 (2021) : 1357-1376 . |
| APA | Qi, Bao-bao , Cheng, Qiang , Li, Shun-lei , Liu, Zhi-feng , Yang, Cong-bin . Precision loss of ball screw mechanism under sliding-rolling mixed motion behavior . | JOURNAL OF CENTRAL SOUTH UNIVERSITY , 2021 , 28 (5) , 1357-1376 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Robotic manipulators are widely used for precise operation in the medical field. Vibration suppression control of robotic manipulators has become a key issue affecting work stability and safety. In this paper an optimal trajectory planning control method to suppress the vibration of a variable-stiffness flexible manipulator considering the rigid-flexible coupling is proposed. Through analyzing the elastic deformation of the variable-stiffness flexible manipulator, a distributed dynamic physical model of the flexible manipulator is constructed based on the Hamilton theory. Based on the mathematical model of the system, the design of the vibration damping controller of the flexible manipulator is proposed, and the control system with nonlinear input is considered for numerical analysis. According to the boundary conditions, the vibration suppression effect of the conventional and the variable-stiffness flexible manipulator is compared. The motion trajectory of the variable-stiffness flexible manipulator and compare the vibration response from different trajectories. Then, with minimum vibration displacement, minimum energy consumption and minimum trajectory tracking deviation as performance goals, the trajectory planning of the variable-stiffness flexible manipulator movement is carried out based on the cloud adaptive differential evolution (CADE) optimization algorithm. The validity of the proposed trajectory planning method is verified by numerical simulation.
关键词 ：
CADE optimization algorithm CADE optimization algorithm control design control design trajectory planning trajectory planning variable-stiffness flexible manipulator variable-stiffness flexible manipulator vibration reduction vibration reduction
引用：
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| GB/T 7714 | Cheng, Qiang , Xu, Wenxiang , Liu, Zhifeng et al. Optimal Trajectory Planning of the Variable-Stiffness Flexible Manipulator Based on CADE Algorithm for Vibration Reduction Control [J]. | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2021 , 9 . |
| MLA | Cheng, Qiang et al. "Optimal Trajectory Planning of the Variable-Stiffness Flexible Manipulator Based on CADE Algorithm for Vibration Reduction Control" . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY 9 (2021) . |
| APA | Cheng, Qiang , Xu, Wenxiang , Liu, Zhifeng , Hao, Xiaolong , Wang, Yi . Optimal Trajectory Planning of the Variable-Stiffness Flexible Manipulator Based on CADE Algorithm for Vibration Reduction Control . | FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY , 2021 , 9 . |
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摘要 ：
Sum-frequency generation (SFG) vibrational spectroscopy is a second-order nonlinear optical spectroscopy technique. Owing to its interfacial selectivity, SFG vibrational spectroscopy can provide interfacial molecular information, such as molecular orientations and order, which can be obtained directly, or molecular density, which can be acquired indirectly. Interfacial molecular behaviors are considered the basic factors for determining the tribological properties of surfaces. Therefore, owing to its ability to detect the molecular behavior in buried interfaces in situ and in real time, SFG vibrational spectroscopy has become one of the most appealing technologies for characterizing mechanisms at friction interfaces. This paper briefly introduces the development of SFG vibrational spectroscopy and the essential theoretical background, focusing on its application in friction and lubrication interfaces, including film-based, complex oil-based, and water-based lubricating systems. Real-time detection using SFG promotes the nondestructive investigation of molecular structures of friction interfaces in situ with submonolayer interface sensitivity, enabling the investigation of friction mechanisms. This review provides guidance on using SFG to conduct friction analysis, thereby widening the applicability of SFG vibrational spectroscopy.
关键词 ：
complex oil-based lubricating systems complex oil-based lubricating systems film-based lubricating systems film-based lubricating systems SFG vibrational spectroscopy SFG vibrational spectroscopy water-based lubricating systems water-based lubricating systems
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| GB/T 7714 | Liu, Zhifeng , Liu, Mengmeng , Zhang, Caixia et al. Applications of sum-frequency generation vibrational spectroscopy in friction interface [J]. | FRICTION , 2021 . |
| MLA | Liu, Zhifeng et al. "Applications of sum-frequency generation vibrational spectroscopy in friction interface" . | FRICTION (2021) . |
| APA | Liu, Zhifeng , Liu, Mengmeng , Zhang, Caixia , Chu, Hongyan , Ma, Liran , Cheng, Qiang et al. Applications of sum-frequency generation vibrational spectroscopy in friction interface . | FRICTION , 2021 . |
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