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Sliding Mode Control of CNC Electromagnetic Levitation System Based on Feedback Linearization

2009中国控制与决策会议

作者： liu chun-fang,An Ming-wei,wang Li-mei school of electrical engineering,shenyang university of technology,shenyang 110178,china

＜正＞The synchrodrive is the important part in the gantry moving type milling machining ***,robust compensation are designed for linear servo systems with parameter variations,friction disturbance and no linearity at low ***,a synchronization control strategy is presented based on fuzzy-coordinated control according to the double position synchronized drive of numerical control（NC） gantry-moving type milling machining *** the designed fuzzy-coordinated controller between the two synchro-driven passages,the output error between two synchro-driven systems is *** the purpose of synchronization control could be *** simulation results show that the proposed scheme have both high synchronization accurate and strong robustness,and while low speed the demand of synchro-driven of NC machining centers can be satisfied.

关键词： Numerical Machine Tools Dynamic Robust Fuzzy-coordinated Low Speed and Synchro-driven Control

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Sliding Mode Control of CNC Electromagnetic Levitation Syste...

Purification of copper foils driven by single crystallization

2009中国控制与决策会议

作者： wang Li-mei,Jin Fu-ying,liu chun-fang school of electrical engineering,shenyang university of technology,shenyang 110178,china

The levitation rigidity for the levitated crossbeam of the gantry numerical control machine tool which can eliminate friction and increase machining precision is *** feedback linearization and sliding mode control methods are presented in this paper in order to achieve steady *** nonlinear electromagnetic levitation system is transformed into linear system by using feedback linearization *** sliding mode control method is adopted for improving the robustness of the levitation *** results show that the system has more powerful ability of suppressing disturbance and high rigidity compared with that using conventional PI control method.

关键词： Magnetic Levitation Feedback Linearization Sliding Mode Control Robustness

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Chinese Physics B 2024年第2期33卷 506-511页

作者：寇金宗赵孟泽李兴光何梦林杨方友刘科海成庆秋任云龙刘灿付莹吴慕鸿刘开辉王恩哥 Songshan Lake Materials Laboratory Dongguan 523808China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Guangdong Provincial Key Laboratory of Quantum engineering and Quantum Materials School of PhysicsSouth China Normal UniversityGuangzhou 510006China Guangdong–Hong Kong Joint Laboratory of Quantum Matter Frontier Research Institute for PhysicsSouth China Normal UniversityGuangzhou 510006China State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education) Department of PhysicsRenmin University of ChinaBeijing 100872China International Center for Quantum Materials Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing 100871China school of Physics Liaoning UniversityShenyang 110036China

High-purity copper(Cu) with excellent thermal and electrical conductivity, is crucial in modern technological applications, including heat exchangers, integrated circuits, and superconducting magnets. The current purification process is mainly based on the zone/electrolytic refining or anion exchange, however, which excessively relies on specific integrated equipment with ultra-high vacuum or chemical solution environment, and is also bothered by external contaminants and energy consumption. Here we report a simple approach to purify the Cu foils from 99.9%(3N) to 99.99%(4N) by a temperature-gradient thermal annealing technique, accompanied by the kinetic evolution of single crystallization of *** success of purification mainly relies on(i) the segregation of elements with low effective distribution coefficient driven by grain-boundary movements and(ii) the high-temperature evaporation of elements with high saturated vapor *** purified Cu foils display higher flexibility(elongation of 70%) and electrical conductivity(104% IACS) than that of the original commercial rolled Cu foils(elongation of 10%, electrical conductivity of ~ 100% IACS). Our results provide an effective strategy to optimize the as-produced metal medium, and therefore will facilitate the potential applications of Cu foils in precision electronic products and high-frequency printed circuit boards.

关键词： purification copper foil thermal annealing technique single crystallization

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Electrochemical Cycled Structure of MnV_2O_6 Nanoribbons Synthesized via Hydrothermal Route

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Chemical Research in Chinese Universities 2011年第3期27卷 528-530页

作者： HU fang ZHANG chun-hua ZHANG Song MING xing CHEN Gang WEI Ving-jin wang chun-zhong school of Materials Science and engineering Shenyang University of Technology Shenyang 110870 P. R. China＂ College of Physics and State Key Laboratory of Superhard Materials Jilin University Changchun 130012 P. R. Chin~ Sollege of Physical Science and technology Huanggang Normal University Huanggang 438000 P. R. China

1 Introduction Low-dimensional nanostructures, such as nanorods, nanowires, and nanotubes, have received much attention for their superior optical, electrical, catalytic and magnetic properties. Owing to their low dimensionality and quantum continement effect, low-dimensional nanoscale materials can be exploited as fundamental building blocks for nanoscience and nanodevices^[1-3]. In recent years, efforts have been devoted to develop new approaches to synthesize one-dimensional（lD） nanostructrued vanadium oxides or vanadates materials, such as V205, NaV2Os, and CuV206, which have been widely investigated in catalytic or electrochemical fields due to their outstanding structural flexibility^[4-6].

关键词： MnV2O6 Hydrothermal route Electrochemical property Cycled structure

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Progress in ceramic materials and structure design toward advanced thermal barrier coatings

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Journal of Advanced Ceramics 2022年第7期11卷 985-1068页

作者： Zhi-Yuan WEI Guo-Hui MENG Lin CHEN Guang-Rong LI Mei-Jun liu Wei-Xu ZHANG Li-Na ZHAO Qiang ZHANG Xiao-Dong ZHANG chun-Lei WAN Zhi-Xue QU Lin CHEN Jing FENG Ling liu Hui DONG Ze-Bin BAO Xiao-Feng ZHAO Xiao-Feng ZHANG Lei GUO Liang wang Bo CHENG Wei-Wei ZHANG Peng-Yun XU Guan-Jun YANG Hong-Neng CAI Hong CUI You wang Fu-xing YE Zhuang MA Wei PAN Min liu Ke-Song ZHOU Chang-Jiu LI State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Strength and Vibration of Mechanical Structures Department of Engineering MechanicsSchool of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China Xi’an Aerospace Composite Research Institute Xi’an 710025China AECC Beijing Institute of Aeronautical Materials Beijing 100095China school of Materials Science and engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of New Ceramics&Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Faculty of Materials Science and engineering Kunming University of Science and TechnologyKunming 650093China school of Materials Science and engineering Beijing Institute of TechnologyBeijing 100081China Xi’an Key Laboratory of High Performance Oil and Gas Field Materials School of Materials Science and EngineeringXi’an Shiyou UniversityXi’an 710065China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming Shanghai Jiao Tong UniversityShanghai 200240China National engineering Laboratory for Modern Materials Surface engineering technology the Key Lab of Guangdong for Modern Surface Engineering TechnologyInstitute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China school of Materials Science and engineering Tianjin UniversityTianjin 300072China Integrated Computational Materials Research Centre Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China State Key Laboratory of Advanced Processing and Recycling of

Thermal barrier coatings(TBCs)can effectively protect the alloy substrate of hot components in aeroengines or land-based gas turbines by the thermal insulation and corrosion/erosion resistance of the ceramic top ***,the continuous pursuit of a higher operating temperature leads to degradation,delamination,and premature failure of the top *** new ceramic materials and new coating structures must be developed to meet the demand for future advanced TBC *** this paper,the latest progress of some new ceramic materials is first ***,a comprehensive spalling mechanism of the ceramic top coat is summarized to understand the dependence of lifetime on various factors such as oxidation scale growth,ceramic sintering,erosion,and calcium–magnesium–aluminium–silicate(CMAS)molten salt ***,new structural design methods for high-performance TBCs are discussed from the perspectives of lamellar,columnar,and nanostructure *** latest developments of ceramic top coat will be presented in terms of material selection,structural design,and failure mechanism,and the comprehensive guidance will be provided for the development of next-generation advanced TBCs with higher temperature resistance,better thermal insulation,and longer lifetime.

关键词： thermal barrier coatings(TBCs) ceramic material degradation and failure structure design long lifetime

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基于表面电荷对抗体分子状态调控的研究

高校化学工程学报 2021年第5期35卷 849-859页

作者：王兴龙董继程程昉刘文豪孙涛李敏何炜大连理工大学化工学院药学系辽宁大连116024 大连理工大学化工学院高分子系辽宁大连116024 辽宁省肿瘤医院肿瘤内科辽宁沈阳110042

抗体功能化纳米粒子(Ab-NPs)由于高亲和力和特异性的优势而得到广泛应用,但抗体分子在纳米粒子表面的分子状态及应用过程中的非特异性吸附均会影响其抗原结合能力。研究制备了一系列不同表面电性和电荷密度的二氧化硅纳米粒子,并分别通... 详细信息

抗体功能化纳米粒子(Ab-NPs)由于高亲和力和特异性的优势而得到广泛应用,但抗体分子在纳米粒子表面的分子状态及应用过程中的非特异性吸附均会影响其抗原结合能力。研究制备了一系列不同表面电性和电荷密度的二氧化硅纳米粒子,并分别通过物理吸附和共价偶联法对抗α-HCG(人绒毛促性腺激素)单克隆抗体进行了固定。实验表明抗体在正电荷纳米粒子表面倾向于Fab朝外,随电荷密度升高抗体固定量减少,抗原结合强度降低;在负电荷纳米粒子表面抗体取向随电荷密度的增高逐渐趋向于Fc片段朝外,抗原结合强度降低。相对于稳定的共价偶联法,物理吸附抗体的纳米粒子在非特异性吸附血清蛋白后会引起抗体取向的重排,使得更多的抗体呈现出Fab片段朝外的取向,从而导致抗原结合能力增加。通过研究电性和电荷密度对表面抗体取向的调控将有助于开发具有高灵敏度、高特异性的生物检测体系。

关键词：抗体功能化纳米粒子电性电荷密度抗体取向非特异性吸附

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气动人工肌肉外骨骼机器人位置跟踪控制

液压与气动 2022年第4期46卷 10-16页

作者：赵智睿张航肖计春刘明芳李醒郝丽娜东北大学机械工程及自动化学院辽宁沈阳110819 东北大学流程工业综合自动化国家重点实验室辽宁沈阳110819 东莞理工大学电子工程与智能化学院广东东莞523808

针对以气动人工肌肉作为关节驱动器的外骨骼机器人关节位置跟踪控制问题进行了研究。首先,在动力学模型的基础上,设计了上层控制器,并结合自适应控制和滑模控制方法降低了动力学参数不准确和扰动项未知对外骨骼机器人的影响;其次,基于... 详细信息

针对以气动人工肌肉作为关节驱动器的外骨骼机器人关节位置跟踪控制问题进行了研究。首先,在动力学模型的基础上,设计了上层控制器,并结合自适应控制和滑模控制方法降低了动力学参数不准确和扰动项未知对外骨骼机器人的影响;其次,基于无模型方法设计了底层关节力矩控制器,调整外骨骼机器人的关节力矩;最后,针对上述控制方案设计仿真实验与外骨骼机器人的穿戴实验。结果表明,该控制方法对气动人工肌肉外骨骼机器人的关节位置跟踪控制是有效的。

关键词：气动人工肌肉外骨骼机器人轨迹跟踪滑模控制

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