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永磁同步电机执行机构新型控制算法研究

电气传动 2024年第1期54卷 3-8页

作者：吴志恒刘爱民沈阳工业大学电气工程学院辽宁沈阳110000 郑州郑飞特种装备有限公司河南郑州450000

电机执行机构应用于断路器中,具有结构简单、动作分散小、可控性强等优点,为实现断路器开关触头对预设参考曲线的跟随提供可能。传统的控制方式参数固定无法根据断路器开关触头运动过程进行参数调整,跟随性差;智能控制算法计算复杂,影... 详细信息

电机执行机构应用于断路器中,具有结构简单、动作分散小、可控性强等优点,为实现断路器开关触头对预设参考曲线的跟随提供可能。传统的控制方式参数固定无法根据断路器开关触头运动过程进行参数调整,跟随性差;智能控制算法计算复杂,影响控制系统快速性,且工程上极难实现。提出一种分段式伪微分控制策略,该控制策略避免了被控变量的直接微分,具有快速动态响应和抗干扰能力,同时,根据环境分段式赋予控制系统参数,保证了跟随精度。建立该控制策略模型进行仿真分析,并研制126 kV断路器电机执行机构控制系统以试验验证,仿真及试验结果均表明了该控制策略的有效性。

关键词：真空断路器电机执行机构分段控制控制算法

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石墨烯及其衍生物改性沥青的研究进展

材料导报 2024年第1期38卷 57-65页

作者：吴智恒黄伊琳毕雁冰梁立喆归立发李卫庆沈培康田植群省部共建特色金属材料与组合结构全寿命安全国家重点实验室南宁530004 广西大学物理科学工程技术学院可再生能源协同创新中心南宁530004 广西壮族自治区交通运输厅南宁530012 广西正路机械科技股份有限公司南宁530218 广西正通工程技术有限公司南宁530218

石墨烯及其衍生物等新型纳米碳材料,因其优异的力学性能、巨大的比表面积和良好的导电导热性能等性质,作为纳米改性剂在沥青领域得到了重点关注,可显著提高改性沥青的高低温性能以及抗疲劳性能,有望解决传统改性沥青耐久性差的问题。本... 详细信息

石墨烯及其衍生物等新型纳米碳材料,因其优异的力学性能、巨大的比表面积和良好的导电导热性能等性质,作为纳米改性剂在沥青领域得到了重点关注,可显著提高改性沥青的高低温性能以及抗疲劳性能,有望解决传统改性沥青耐久性差的问题。本文系统总结了石墨烯及其衍生物改性沥青的最新研究进展,从石墨烯结构和表面特性的角度重点评述了石墨烯含量、层数、孔缺陷、表面化学态对沥青改性效果的影响及改性机理,同时介绍了石墨烯改性沥青的实际工程应用情况。最后针对石墨烯改性沥青性能与两者之间的相容性的依赖关系,提出了利用孔缺陷和元素掺杂石墨烯促进石墨烯在沥青中的分散及相容性的研究新策略。

关键词：沥青功能化石墨烯界面作用石墨烯改性沥青

Atomic Layer Coated Al_(2)O_(3) on Nitrogen Doped Vertical Graphene Nanosheets for High Performance Sodium Ion Batteries

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Energy & Environmental Materials 2022年第1期5卷 285-294页

作者： zhiheng wu Xiangdan Zhang Lijun Deng Yongshang Zhang Zhuo Wang Yonglong Shen Guosheng Shao State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou University100 Kexue AvenueZhengzhou 450001China Zhengzhou Materials Genome Institute(ZMGI) Building 2ZhongyuanzhiguXingyangZhengzhou 450100China Center for Advanced analysis&Gene Sequencing Zhengzhou UniversityZhengzhou 450001China

Heteroatom doped graphene materials are considered as promising anode for high-performance sodium-ion batteries(SIBs).Defective and porous structure especially with large specific surface area is generally considered as a feasible strategy to boost reaction kinetics;however,the unwanted side reaction at the anode hinders the practical application of *** this work,a precisely controlled Al_(2)O_(3)coated nitrogen doped vertical graphene nanosheets(NVG)anode material has been proposed,which exhibits excellent sodium storage capacity and cycling *** ultrathin Al_(2)O_(3)coating on the NVG is considered to help construct an advantageous interface between electrode and electrolyte,both alleviating the electrolyte decomposition and enhancing sodium adsorption *** a result,the optimal Al_(2)O_(3)coated NVG materials delivers a high reversible capacity(835.0 mAh g^(-1))and superior cycling stability(retention of 92.3%after 5000 cycles).This work demonstrates a new way to design graphene-based anode materials for highperformance sodium-ion batteries.

关键词： Al_(2)O_(3) nitrogen doped vertical graphene nanosheets reaction kinetics sodium-ion batteries

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机器人用杯形谐波减速器应力和变形分析

机床与液压 2024年第3期52卷 44-48页

作者：易伟锋刘泓滨吴智恒张华伟韩守磊昆明理工大学云南昆明106742 广东省科学院智能制造研究所广东广州510070 广州市昊志机电股份有限公司广东广州511356

针对杯形谐波减速器复杂的装配变形和应力分布,基于ANSYS软件建立有限元分析模型,分析谐波减速器在装配和加载过程中的应力和变形规律。研究结果表明:波发生器与柔轮装配时,柔轮和轴承外圈产生了不同程度的倾斜;刚轮与柔轮装配后,柔轮... 详细信息

针对杯形谐波减速器复杂的装配变形和应力分布,基于ANSYS软件建立有限元分析模型,分析谐波减速器在装配和加载过程中的应力和变形规律。研究结果表明:波发生器与柔轮装配时,柔轮和轴承外圈产生了不同程度的倾斜;刚轮与柔轮装配后,柔轮和轴承外圈在长轴位置的最大径向变形量分别相比前者减少14.1%和9.1%;随着负载的增大,柔轮应力增长趋势为变斜率上升,153 N·m后柔轮应力加速上升,斜率约为0.354;通过三维应变测量系统对柔轮装配变形进行测量,实验与仿真结果基本一致。研究结果表明柔轮、轴承和刚轮对谐波减速器应力和变形分布都有较大影响,其为谐波减速器的设计、使用和性能试验提供数据支撑。

关键词：谐波减速器柔轮轴承变形测量

Seamless Stitching of Redox Windows to Enable High-Voltage Resilient Solid Sodium Ion Batteries

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Energy & Environmental Materials 2023年第6期6卷 445-454页

作者： Xiangdan Zhang Yuanyuan Huang Xiaoyi Hu Ruxin Guo Yongshang Zhang zhiheng wu Guoqin Cao Yuran Yu Zhuo Wang Yonglong Shen Guosheng Shao School of Materials Engineering Henan International Joint Laboratory of Rare Earth Composite MaterialsHenan University of EngineeringZhengzhou 451191China School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Zhengzhou Materials Genome Institute Building 2ZhongyuanzhiguXingyang 450100China

While sulfide solid electrolytes such as Na_(11)Sn_(2)PS_(12)can allow fast transport of Na+ions,their utilization in solid sodium ion batteries is rather unsuccessful since they are not electrochemically compatible to both high-voltage cathodes and sodium metal *** this work,we devise an effective approach toward realizing solid sodium ion batteries,using the Na_(11)Sn_(2)PS_(12)electrolyte and slurry-coated NASICON-type Na_(3)MnTi(PO_(4))_(3)@C as high-voltage cathode,highly beneficial for low processing cost and high content/loading of active cathode *** report that through significantly improved integrity of electrolyte-cathode interface,such solid sodium ion batteries can deliver outstanding cycling and rate performance,with a charge voltage resilience up to 4.1 V,a high cathode discharge capacity of 128.7 mAh g^(-1)against the Na_(3)MnTi(PO_(4))_(3)@C in cathode is achieved at 0.05 C,and capacity retention ratio of 82%with a rate of 0.1 C is realized after prolonged cycling at room ***,we demonstrate that such a solid sodium ion battery can even perform at a sub-zero Celsius temperature of-10℃,when the conventional control cell using liquid electrolyte completely fail to *** work is to offer a dependable avenue in engineering next generation of safe solid ion batteries based on highly sustainable and much cheaper material resources.

关键词： C-coated NASICON nanocrystals electrolyte-electrode interface full-cathode capacity Na_(11)Sn_(2)PS_(12) solid sodium-ion battery

Complex permittivity-dependent plasma confinement-assisted growth of asymmetric vertical graphene nanofiber membrane for high-performance Li-S full cells

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InfoMat 2022年第7期4卷 129-146页

作者： Yongshang Zhang zhiheng wu Shaobin Wang Neng Li S.Ravi P.Silva Guosheng Shao Peng Zhang State Center for International Cooperation on Designer Low-Carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhouChina Zhengzhou Materials Genome Institute(ZMGI) ZhengzhouChina School of Chemical Engineering and Advanced Materials University of AdelaideAdelaideSouth AustraliaAustralia State Key Laboratory of Silicate Materials for Architecture Wuhan University of TechnologyWuhanChina Nanoelectronics Center Advanced Technology InstituteUniversity of SurreyGuildfordUK

Vertical graphene(VG),possessing superior chemical,physical,and structural peculiarities,holds great promise as a building block for constructing a high-energy density lithium-sulfur(Li-S)***,it is desirable to develop a new VG growth technique with a novel structure to enable wide ***,we devise a novel complex permittivity-dependent plasma confinement-assisted VG growth technique,via asymmetric growing a VG layer on one side of N-doped carbon nanofibers for the first time,using a unique lab-built high flux plasma-enhanced chemical vapor deposition system,as a bifunctional nanofiber membrane to construct Li-S batteries with low neg-ative/positive(N/P)and electrolyte/sulfur(E/S)*** unique nanofiber membrane could simultaneously protect the cathode and anode,enabling an excellent electrochemical performance with low N/P and E/S ratios in Li-S *** a full cell delivers high gravimetric energy density and volumetric energy density of 340 Wh kg^(-1) and 547 Wh L^(-1),respectively,at low N/P(2:1)and E/S(4:1)***,a pouch cell achieves a high areal capacity of 7.1 mAh cm^(-2) at a sulfur loading of 6 mg cm^(-2).This work put forward a novel pathway for the design of high-energy density Li-S batteries.

关键词： asymmetric complex permittivity electrospinning Li-S batteries vertical graphene

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汽车永磁同步电机切换函数式混合控制策略

汽车工程 2023年第4期45卷 619-626,597页

作者：吴志恒刘爱民沈阳工业大学电气工程学院沈阳110000

为提高电动汽车所配永磁同步电机(PMSM)的驱动系统工作效率,增强运动过程的平稳性及响应速度,以达到提升电动汽车驱动系统的整体动态控制性能。根据电动汽车电机工作特性分析及反馈控制原理推导,提出并设计切换函数式混合控制技术。该... 详细信息

为提高电动汽车所配永磁同步电机(PMSM)的驱动系统工作效率,增强运动过程的平稳性及响应速度,以达到提升电动汽车驱动系统的整体动态控制性能。根据电动汽车电机工作特性分析及反馈控制原理推导,提出并设计切换函数式混合控制技术。该控制技术有效地提高了车用电机控制系统的动、静态性能和鲁棒性。为验证所提控制技术的有效性,建立仿真模型对其进行仿真分析,并搭建实验平台进行实验验证。仿真与实验结果均表明,所提控制技术具有输出响应快、无超调和振荡的优点,能够提高电机工作效率,优化驱动系统输出特性,提升电动汽车驱动系统的控制性能。

关键词：永磁同步电机电动汽车模糊比例控制切换函数

CD146,a therapeutic target involved in cell plasticity

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Science China(Life Sciences) 2024年第8期67卷 1563-1578页

作者： Zhenzhen wu Yuzhe Zang Chuyi Li zhiheng He Jingyu Liu Zhaoqi Du Xinran Ma Lin Jing Hongxia Duan Jing Feng Xiyun Yan CAS Engineering Laboratory for Nanozyme Key Laboratory of BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China Nanozyme Laboratory in Zhongyuan Henan Academy of Innovations in Medical ScienceZhengzhou 451163China Joint Laboratory of Nanozymes in Zhengzhou University School of Basic Medical SciencesZhengzhou UniversityZhengzhou 450001China

Since its identification as a marker for advanced melanoma in the 1980s,CD146 has been found to have multiple functions in both physiological and pathological processes,including embryonic development,tissue repair and regeneration,tumor progression,fibrosis disease,and *** research has revealed that CD146 is involved in various signaling pathways as a receptor or coreceptor in these *** correlation between CD146 and multiple diseases has sparked interest in its potential applications in diagnosis,prognosis,and targeted *** better comprehend the versatile roles of CD146,we have summarized its research history and synthesized findings from numerous reports,proposing that cell plasticity serves as the underlying mechanism through which CD146 contributes to development,regeneration,and various *** CD146 would consequently halt cell state shifting during the onset and progression of these related ***,the development of therapy targeting CD146 holds significant practical value.

关键词： CD146 cell plasticity therapeutic target

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Mapk7 deletion in chondrocytes causes vertebral defects by reducing MEF2C/PTEN/AKT signaling

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Genes & Diseases 2024年第2期11卷 964-977页

作者： Chengzhi wu Hengyu Liu Dongmei Zhong Xiaoming Yang zhiheng Liao Yuyu Chen Shun Zhang Deying Su Baolin Zhang Chuan Li Liru Tian Caixia Xu Peiqiang Su Guangdong Provincial Key Laboratory of Orthopedics and Traumatology Department of Spine SurgeryThe First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080China Research Center for Translational Medicine The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080China Precision Medicine Institute The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080China Department of Orthopedics Renmin Hospital of Wuhan UniversityWuhanHubei 430060China Guangdong Provincial Key Laboratory of Proteomics and State Key Laboratory of Organ Failure Research School of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong 510515China

Mutation of the MAPK7 gene was related to human ***7 regulated the development of limb bones and skulls in ***,the role of MAPK7 in vertebral development is still *** this study,we constructed Col2a1-cre;Mapk7 f/f transgenic mouse model to delete Mapk7 in cartilage,which displayed kyphosis and ***,Mapk7 loss decreased MEF2C expression and thus activated PTEN to oppose PI3K/AKT signaling in vertebral growth plate chondrocytes,which impaired chondrocyte hypertrophy and attenuated vertebral *** vivo,systemic pharmacological activation of AKT rescued impaired chondrocyte hypertrophy and alleviated mouse vertebral defects caused by Mapk7 *** study firstly clarified the mechanism by which MAPK7 was involved in vertebral development,which might contribute to understanding the pathology of spinal deformity and provide a basis for the treatment of developmental disorders of the spine.

关键词： Chondrocyte hypertrophy Growth plate Kyphosis MAPK7 MEF2C Osteopenia PI3K/AKT PTEN