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学者姓名：程强
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摘要 ：
Geometric errors in gantry milling machines with long-span beams and large travel can seriously degrade workpiece accuracy. Sensitivity analysis and compensation of geometric errors with coupling and fluctuation can significantly improve the machining performance of machine tools. An accuracy enhancement approach for gantry milling machines is proposed in this paper. Firstly, the geometry error analytic fluctuation eigenfunctions are established by using the high-order Fourier series fitting. Secondly, a non-linear generalized correlation analysis model is proposed to identify the crucial errors that significantly affect the machining accuracy. Thirdly, the motion commands compensated for geometric errors are calculated. Specifically, compared to traditional inverse kinematics, the proposed error compensation process is simple and suitable for most machine tools with orthogonal linear axes. Finally, comparative cutting experiments are performed. The accuracy of the test piece is improved by approximately 34.7 % with error compensation. The effectiveness of the proposed method is validated.
关键词 ：
Non-linear generalized correlation Non-linear generalized correlation Error compensation Error compensation Compensation of milling processing Compensation of milling processing Geometric errors Geometric errors Error sensitivity analysis Error sensitivity analysis
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| GB/T 7714 | Niu, Peng , Cheng, Qiang , Chen, Chuanhai et al. An approach for crucial geometric error analysis and accuracy enhancement of gantry milling machines based on generalized correlation sensitivity [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2024 , 119 : 401-413 . |
| MLA | Niu, Peng et al. "An approach for crucial geometric error analysis and accuracy enhancement of gantry milling machines based on generalized correlation sensitivity" . | JOURNAL OF MANUFACTURING PROCESSES 119 (2024) : 401-413 . |
| APA | Niu, Peng , Cheng, Qiang , Chen, Chuanhai , Yang, Congbin , Liu, Zhifeng . An approach for crucial geometric error analysis and accuracy enhancement of gantry milling machines based on generalized correlation sensitivity . | JOURNAL OF MANUFACTURING PROCESSES , 2024 , 119 , 401-413 . |
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摘要 ：
This study aims to analyze the impact of uniform and eccentric load conditions on the performance of internal feedback hydrostatic thrust and journal bearing. Two distinct models are established: a three-degrees-of-freedom uniform load model and a five-degrees-of-freedom eccentric load model. The support stiffness, overturning stiffness, and flow rate for both thrust and journal bearings are calculated. Additionally, numerical analysis is conducted to examine the influence of oil film thickness, inlet pressure, and restrictor size on the operational characteristics of the bearings, revealing the interplay between an eccentric load and journal bearing speed. The validity of the theoretical algorithm is verified through finite element simulation. The research outcomes hold significant guiding implications for the design and application of internal feedback hydrostatic bearings.
关键词 ：
flow rate flow rate stiffness stiffness load model load model internal feedback internal feedback
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| GB/T 7714 | Ma, Honglie , Liu, Zhifeng , Yang, Congbin et al. Research on the Support Performance of Internal Feedback Hydrostatic Thrust and Journal Bearing Considering Load Effect [J]. | MATHEMATICS , 2024 , 12 (9) . |
| MLA | Ma, Honglie et al. "Research on the Support Performance of Internal Feedback Hydrostatic Thrust and Journal Bearing Considering Load Effect" . | MATHEMATICS 12 . 9 (2024) . |
| APA | Ma, Honglie , Liu, Zhifeng , Yang, Congbin , Cheng, Qiang , Zhao, Yongsheng . Research on the Support Performance of Internal Feedback Hydrostatic Thrust and Journal Bearing Considering Load Effect . | MATHEMATICS , 2024 , 12 (9) . |
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摘要 ：
For complex equipment, it is easy to over-evaluate the impact of failure on production by estimating the reliability level only through failure probability. To remedy this problem, this paper proposes a statistical evaluation method based on fuzzy failure data considering the multi-state characteristics of equipment failures. In this method, the new reliability-evaluation scheme is firstly presented based on the traditional statistical analysis method using the Weibull distribution function. For this scheme, the failure-grade index is defined, and a fuzzy-evaluation method is also proposed by comprehensively considering failure severity, failure maintenance, time, and cost; this is then combined with the time between failures to characterize the failure state. Based on the fuzzy failure data, an improved adaptive-failure small-sample-expansion method is proposed based on the classical bootstrap method and the deviation judgment between distributions of the original and newborn samples. Finally, a novel reliability-evaluation model, related to the failure grade and its membership degree, is established to quantify the reliability level of equipment more realistically. Example cases for three methods of the scheme (the failure-grade fuzzy-evaluation method, the sample-expansion method, and the reliability-evaluation modeling method) are presented, respectively, to validate the effectiveness and significance of the proposed reliability-evaluation technology.
关键词 ：
Weibull distribution Weibull distribution multi-state failures multi-state failures small-sample expansion small-sample expansion fuzzy evaluation fuzzy evaluation reliability evaluation reliability evaluation
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| GB/T 7714 | Xu, Jingjing , Yan, Qiaobin , Pei, Yanhu et al. A Statistical Evaluation Method Based on Fuzzy Failure Data for Multi-State Equipment Reliability [J]. | MATHEMATICS , 2024 , 12 (9) . |
| MLA | Xu, Jingjing et al. "A Statistical Evaluation Method Based on Fuzzy Failure Data for Multi-State Equipment Reliability" . | MATHEMATICS 12 . 9 (2024) . |
| APA | Xu, Jingjing , Yan, Qiaobin , Pei, Yanhu , Liu, Zhifeng , Cheng, Qiang , Chu, Hongyan et al. A Statistical Evaluation Method Based on Fuzzy Failure Data for Multi-State Equipment Reliability . | MATHEMATICS , 2024 , 12 (9) . |
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摘要 ：
本发明公开了一种微型滚柱丝杠副光弹模型适应性自动加载装置，包含安装床身，所述床身与工作台通过螺栓固定，工作台可沿着床身导轨进行前后移动，所述工作台上安装有驱动电机与操作台，驱动电机与齿轮传动机构相连，驱动电机通过操作台进行控制，齿轮传动机构与丝杠夹持机构相连，通过齿轮驱动螺母转动实现对滚柱丝杠副的加载，通过力传感器与操作台显示并控制加载力的大小，齿轮传动机构外部通过齿轮轴连接有一个齿轮安装支架，齿轮安装支架通过螺栓与工作台相连接。本发明的电机与齿轮传动系统的联动可保证三个螺母自动以相同速度同时进行加载；丝杠夹持机构加载螺母与锁紧螺母可保证对丝杠进行持续加载，以便于热处理的进行。
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| GB/T 7714 | 程强 , 王畅 , 张涛 et al. 一种微型滚柱丝杠副光弹模型适应性自动加载装置 : CN202310743953.6[P]. | 2023-06-24 . |
| MLA | 程强 et al. "一种微型滚柱丝杠副光弹模型适应性自动加载装置" : CN202310743953.6. | 2023-06-24 . |
| APA | 程强 , 王畅 , 张涛 , 王建辉 , 张彩霞 , 刘志峰 . 一种微型滚柱丝杠副光弹模型适应性自动加载装置 : CN202310743953.6. | 2023-06-24 . |
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摘要 ：
本发明提供了一种滚珠丝杠副精度衰退预测方法，实现该方法的步骤包括如下：S1、基于Hertz接触理论对滚珠丝杠副进行载荷分析；S2、基于Archard磨损理论建立滚珠丝杠副预紧力衰退预测模型；S3、分析滚珠与滚道接触区域的运动特性，对滚珠丝杠副进行运动学分析；S4、建立滚珠丝杠副磨损量与预紧力退化耦合模型，对不同工况下滚珠丝杠副精度衰退模型的建立与预测分析；本发明对于研究滚珠误差、摩擦磨损、预紧力退化和精度衰退对精度保持性的作用影响机理，建立实现精度保持性评价体系具有重要意义。
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| GB/T 7714 | 杨聪彬 , 刘玉镜 , 程强 et al. 一种双螺母滚珠丝杠精度衰退预测方法 : CN202310250178.0[P]. | 2023-03-15 . |
| MLA | 杨聪彬 et al. "一种双螺母滚珠丝杠精度衰退预测方法" : CN202310250178.0. | 2023-03-15 . |
| APA | 杨聪彬 , 刘玉镜 , 程强 , 张涛 , 刘志峰 , 许静静 . 一种双螺母滚珠丝杠精度衰退预测方法 : CN202310250178.0. | 2023-03-15 . |
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摘要 ：
本发明公开了一种内反馈式静压转台节流器设计方法，计算扇形油垫的流量。采用有限差分法对二阶偏微分方程进行离散，采用高斯赛德尔迭代法对上式进行求解，得到油腔的无量纲压强，得不同方向的速度三维分布；矩形缝隙流量计算。由于矩形缝隙节流器的短边尺寸非常小，将矩形缝隙节流器看成是矩形油垫，其只有长边封油边起作用。转台旋转后，流经矩形缝隙的油液带有离心力。在求解矩形缝隙节流器的流量时，将矩形油垫等效成扇形油垫，其中心和扇形油垫中心重合，等效前后面积不变。在初始状态下，上下油腔油膜厚度相同，根据内反馈结构特点，经过下油腔的流量和过节流边的流量相等。本发明关于节流器长度计算方法更符合实际。
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| GB/T 7714 | 杨聪彬 , 马弘列 , 张涛 et al. 一种内反馈式静压转台节流器设计方法 : CN202310230978.6[P]. | 2023-03-12 . |
| MLA | 杨聪彬 et al. "一种内反馈式静压转台节流器设计方法" : CN202310230978.6. | 2023-03-12 . |
| APA | 杨聪彬 , 马弘列 , 张涛 , 刘志峰 , 程强 . 一种内反馈式静压转台节流器设计方法 : CN202310230978.6. | 2023-03-12 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种内反馈式静压转台偏载性能计算方法，包括步骤一：计算倾斜后各油腔油膜厚度。步骤二：根据流体润滑理论，计算上下油腔压强及支承力矩。步骤三：计算偏载下转台角度；定义油垫结构参数，选取油液属性参数：本发明具有的优点和积极效果是：本发明充分考虑了实际负载的影响，通过多层次迭代进行偏转角度的求解，而非直接给定偏转角，更符合实际转台运行工况。
引用：
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| GB/T 7714 | 杨聪彬 , 马弘列 , 程强 et al. 一种内反馈式静压转台偏载性能计算方法 : CN202310702345.0[P]. | 2023-06-14 . |
| MLA | 杨聪彬 et al. "一种内反馈式静压转台偏载性能计算方法" : CN202310702345.0. | 2023-06-14 . |
| APA | 杨聪彬 , 马弘列 , 程强 , 李迎 , 刘志峰 . 一种内反馈式静压转台偏载性能计算方法 : CN202310702345.0. | 2023-06-14 . |
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摘要 ：
This paper is devoted to provide a prediction model for precision degradation of roller linear guide rail under thermal conditions under the influence of multiple random parameters. The relationship between the material properties and the elastic contact of the inner structure of the guide rail under the influence of temperature is analyzed by using the statically indeterminate mechanics, and the generation of the frictional thermal expansion effect and its influence on the subsequent wear mechanism of the guide rail are taken into account. Based on this, the Archard theory is modified. Finally, the prediction model of the precision deterioration of the guide rail is established according to different running time. Through numerical simulation analysis and comparison with the relevant test data, it shows that the precision deterioration curve is consistent with the test results, and the error is within 10%. The model can be used to predict the precision deterioration of roller linear guide rail.
关键词 ：
Model of wear Model of wear Rolling guide rail Rolling guide rail Deterioration of accuracy Deterioration of accuracy Frictional heat effect Frictional heat effect
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| GB/T 7714 | Cheng, Qiang , Zhang, Hongyi , Zhang, Tao et al. Prediction method of precision deterioration of rolling guide under multi-random parameters based on frictional thermal expansion effect [J]. | TRIBOLOGY INTERNATIONAL , 2023 , 189 . |
| MLA | Cheng, Qiang et al. "Prediction method of precision deterioration of rolling guide under multi-random parameters based on frictional thermal expansion effect" . | TRIBOLOGY INTERNATIONAL 189 (2023) . |
| APA | Cheng, Qiang , Zhang, Hongyi , Zhang, Tao , Li, Ying , Xu, Jingjing , Liu, Zhifeng . Prediction method of precision deterioration of rolling guide under multi-random parameters based on frictional thermal expansion effect . | TRIBOLOGY INTERNATIONAL , 2023 , 189 . |
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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 Parameter adjustment Parameter adjustment Degradation compensation Degradation compensation Energy conversion efficiency Energy conversion efficiency Stability Stability
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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 ：
本发明公开了一种机床直线轴的垂直直线度与角度误差预测建模方法，首先通过概率统计与"3σ"产品合格检验准则，利用制造误差为幅值的正弦函数表征导轨制造表面曲线；基于有限元分析揭示导轨群组螺栓特定装配工序下的预紧力分布规律，提出一种超静定分析的导轨装配变形模型。最后，综合考虑制造与装配的叠加效应，建立导轨空间轮廓曲线方程。进而，根据几何变换关系，计算机床直线轴的垂直直线度与角度误差。本发明通过对导轨制造与装配过程的相关设计参数开展不确定分析，得到的导轨空间轮廓曲线比传统研究中规律性、周期性的正弦函数假设更为精确，本发明对机床原始的设计方案优化与几何精度的提升奠定了理论基础。
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| GB/T 7714 | 程强 , 牛鹏 , 张涛 et al. 一种机床直线轴的垂直直线度与角度误差预测建模方法 : CN202211218760.0[P]. | 2022-10-07 . |
| MLA | 程强 et al. "一种机床直线轴的垂直直线度与角度误差预测建模方法" : CN202211218760.0. | 2022-10-07 . |
| APA | 程强 , 牛鹏 , 张涛 , 李迎 , 程艳红 , 章子玲 . 一种机床直线轴的垂直直线度与角度误差预测建模方法 : CN202211218760.0. | 2022-10-07 . |
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