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Multivariable Decoupling Control of Civil Turbofan Engines Based on Fully Actuated System Approach

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Journal of Systems Science & Complexity 2023年第3期36卷 947-959页

作者： PENG Kai WANG Hongxia zhang Huanshui zhang zhaorong YANG Fan School of Power and Energy Northwestern Polytechnical UniversityXi’an 710072China School of Electrical and Automation Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Applied Mathematics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina. Xi’an Aeronautics Computing Technique Research Institute AVICXi’an 710068China

Gas turbine engines must be operated by means of control,and how to achieve multivariable control decoupling with aero-engine control constraints is an open thorny issue attracting increasingly more attention.The paper considers the multivariable decoupling problems of aero-engines by using a compound controller,which originates from the fact that it is impossible to eliminate all the nonlinear dynamics of system to obtain desired constant linear closed-loop system by using full actuated control because of modeling errors and some physical constraints.Two controllers are involved in the compound controller.One is a fully actuated controller and the other is classical feedback controller.In order to use fully actuated control and maintain the accuracy of engine model,a full state scheduling linear parameter-varying(LPV)modeling method is proposed based on fuzzy neural network weights.For a general input matrix of the system,its generalized inverse is applied to design fully actuated controller to result in a pseudolinear system.Combined with a feedback controller and control limiter,the control synthesis is achieved.The simulation shows that the proposed method is possessed of a better decoupling and tracking effect compared with traditional control approach.

关键词： Compound control decoupling control fully actuated control turbofan engine

Crystalline-amorphization-recrystallization structural transition and emergent superconductivity in van der Waals semiconductor SiP under compression

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 115-122页

作者： Chunhua Chen Zhenyu Ding Yonghui Zhou Yifang Yuan Nixian Qian Jing Wang Shuyang Wang Ying Zhou Chao An Min zhang Xuliang Chen Xiaoping Yang Mingliang Tian zhaorong Yang Anhui Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityHefei 230601China Institutes of Physical Science and Information Technology Anhui UniversityZhengzhou 450001China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

van der Waals(vdW)semiconductors have gained significant attention due to their unique physical properties and promising applications,which are embedded within distinct crystallographic symmetries.Here,we report a pressure-induced crystallineamorphization-recrystallization transition under compression in binary vdW semiconductor SiP.Upon compression to 52 GPa,bulk SiP undergoes a consecutive phase transition from pristine crystalline to amorphous phase,ultimately to recrystallized phase.By employing synchrotron X-ray diffraction experiments in conjunction with high-pressure crystal structure searching techniques,we reveal that the recrystallized Si P hosts a tetragonal structure(space group I4mm)and further transforms partially into a cubic phase(space group Fm3m).Consistently,electrical transport and alternating-current magnetic susceptibility measurements indicate the presence of three superconducting phases,which are embedded in separate crystallographic symmetries—the amorphous,tetragonal,and cubic structures.Furthermore,a high superconducting transition temperature of 12.3 K is observed in its recovered tetragonal phase during decompression.Our findings uncover a novel phase evolution path and elucidate a pressure-engineered structure-property relationship in vdW semiconductor SiP.These results not only offer a new platform to explore the transformation between different structures and functionalities,but also provide new opportunities for the design and exploration of advanced devices based on vdW materials.

关键词： recrystallization transition amorphous

Mapping of powdery mildew resistance genes transferred to common wheat from wild emmer wheat revealed three functional Pm60 haplotypes

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The Crop Journal 2024年第2期12卷 540-548页

作者： Wenxin Wei Nannan Liu Shengnan zhang Jing zhang Wei Pan Xiaoming Xie Zuhuan Yang Junna Sun Jun Ma zhaorong Hu Weilong Guo Qiaoling Luo Jingzhong Xie Fei He Yinghui Li Chaojie Xie Qixin Sun Key Laboratory of Crop Heterosis and Utilization(MOE)/Key Laboratory of Crop Genetic Improvement China Agricultural UniversityBeijing 100193China Institute of Advanced Agricultural Science Peking UniversityWeifang 261200ShandongChina Institute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101China Triticeae Research Institute Sichuan Agricultural UniversityChengdu 611130SichuanChina Institute of Evolution University of HaifaMt.CarmelHaifa 3498838Israel

Powdery mildew(PM),caused by Blumeria graminis f.***.tritici(Bgt),is one of the destructive wheat diseases worldwide.Wild emmer wheat(Triticum turgidum ssp.dicoccoides,WEW),a tetraploid progenitor of common wheat,is a valuable genetic resource for wheat disease resistance breeding programs.We developed three hexaploid pre-breeding lines with PM resistance genes derived from three WEW accessions.These resistant pre-breeding lines were crossed with susceptible common wheat accessions.Segregations in the F2populations were 3 resistant:1 susceptible,suggesting a single dominant allele in each resistant parent.Mapping of the resistance gene in each line indicated a single locus on the long arm of chromosome 7A,at the approximate location of previously cloned Pm60 from T.urartu.Sanger sequencing revealed three different Pm60 haplotypes(Hap 3,Hap 5,and Hap 6).Co-segregating diagnostic markers were developed for identification and selection of each haplotype.The resistance function of each haplotype was verified by the virus-induced gene silencing(VIGS).Common wheat lines carrying each of these Pm60 haplotypes were resistant to most Bgt isolates and differences in the response arrays suggested allelic variation in response.

关键词： Alleles Blumeria graminus Marker-assisted selection Molecular marker Triticum dicoccoides

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乡村振兴中活态遗产的生命本真

文化遗产 2024年第3期 9-16页

作者：彭兆荣张颖四川美术学院中国艺术遗产研究中心重庆401331

“非物质文化遗产”也被称为“活态遗产”(living heritage)。中华文明总体上属于农耕文明,包含着鲜明的生命意象,与“活态传承”(“非物质文化遗产”的传承方式)相得益彰。也就是说,我国非物质文化遗产的根脉相嵌着“生命农学”的深深... 详细信息

“非物质文化遗产”也被称为“活态遗产”(living heritage)。中华文明总体上属于农耕文明,包含着鲜明的生命意象,与“活态传承”(“非物质文化遗产”的传承方式)相得益彰。也就是说,我国非物质文化遗产的根脉相嵌着“生命农学”的深深痕迹。邻国日本在进行乡村振兴的过程中,也极其重视这一主题,可为参照。当下我国正在进行乡村振兴战略,而保护文化遗产,特别是与保护非物质文化遗产并行并举。中华农耕文明中“天时-地利-物候”的农学基因生动表明了这种生命意象。同时,作为传统的耕读传家的活态遗产的重要纽带,为我们提供了一种传承的中国特色。遗憾的是,我国在进行非物质文化遗产的学理讨论中,鲜见“农学”身影,这不能不说是一个重大的缺失。

关键词：乡村振兴非物质文化遗产生命农学物候耕读传家

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基于矩阵磁结构的平面电感寄生电容优化设计

中国电机工程学报 2024年第7期44卷 2825-2832,I0025页

作者：屠腾张方华张钊荣黄恩泽余文浩多电飞机电气系统工信部重点实验室(南京航空航天大学) 江苏省南京市210016

当平面电感的单层绕组匝数超过一匝时,外侧绕组间存储的电场能量会导致寄生电容偏大。为降低平面电感寄生电容,文中将一个电感拆分为多个分立电感以实现单层一匝的绕制方案,并分析分立电感方案与单磁心方案在铁损、铜损和体积方面的变... 详细信息

当平面电感的单层绕组匝数超过一匝时,外侧绕组间存储的电场能量会导致寄生电容偏大。为降低平面电感寄生电容,文中将一个电感拆分为多个分立电感以实现单层一匝的绕制方案,并分析分立电感方案与单磁心方案在铁损、铜损和体积方面的变化。针对分立电感体积增大这一问题,进一步提出矩阵磁方案,给出两电感、四电感磁集成结构。有限元仿真结果表明,相接近的体积下,矩阵磁方案降低了77%的寄生电容,并减小了69%的铜损。最后,搭建一台Buck变换器。功率实验结果表明,矩阵磁结构平面电感具有更优的性能。

关键词：平面电感寄生电容矩阵磁磁集成

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非正交多址接入异构网络用户公平性问题研究

现代电子技术 2024年第13期47卷 61-65页

作者：安秀娟王兆荣张东坡中国电子科技集团公司第三十六研究所浙江嘉兴314000

针对5G非正交多址接入异构网络主要以传输总速率最大化为优化目标带来的资源分配不平衡,导致部分信道最小速率过低,造成用户服务质量下降,从而带来用户之间不公平问题,文中基于非正交接入异构网络模型,综合考虑传输总速率和用户最小速率... 详细信息

针对5G非正交多址接入异构网络主要以传输总速率最大化为优化目标带来的资源分配不平衡,导致部分信道最小速率过低,造成用户服务质量下降,从而带来用户之间不公平问题,文中基于非正交接入异构网络模型,综合考虑传输总速率和用户最小速率,提出将整体优化问题解耦,利用最佳信道配对选择和优化用户功率分配方法最大化最小用户速率,解决用户公平性问题。仿真结果表明,提出的算法在较低的复杂度下,用户最小速率明显优于传统方法,用户公平性明显提升。

关键词：异构网络非正交多址接入用户公平性信道配对选择功率分配用户最小速率

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含砷含镍高酸硫酸铜结晶母液的综合利用

有色金属（冶炼部分） 2024年第6期 114-121页

作者：罗钊荣戴贞洧张飞谢太李江西铜业股份有限公司贵溪冶炼厂江西贵溪335424

针对硫酸铜结晶母液含砷、含镍、高酸的特点,根据正交试验法,采用pH调控法依次进行中和、沉铜、沉镍工业试验,探究了反应时间和终点pH对分离效果的影响。结果表明,采用液碱调控母液pH能有效回收铜、砷、镍元素。中和反应最佳参数为:终点... 详细信息

针对硫酸铜结晶母液含砷、含镍、高酸的特点,根据正交试验法,采用pH调控法依次进行中和、沉铜、沉镍工业试验,探究了反应时间和终点pH对分离效果的影响。结果表明,采用液碱调控母液pH能有效回收铜、砷、镍元素。中和反应最佳参数为:终点pH=2.5~3.0、反应时间1.5 h、反应自然升温,能够以铜砷渣形式回收98%以上的砷,并与镍成功分离;沉铜反应终点pH=6.0~6.5、反应时间1.0 h、反应温度80~90℃,能实现铜沉淀率>93%;沉镍反应终点pH=10.0~10.5、反应时间2.0 h,在室温下压滤,镍沉淀率>98%。母液经处理后得到的沉镍后液含铜96%,砷回收率>98%,镍回收率>84%。

关键词：硫酸铜结晶母液含砷废水含镍废水镍回收废水资源回收

统一硬化本构在海上风电大直径单桩桩-土分析中的应用

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南方能源建设 2024年第2期11卷 68-81页

作者：马兆荣刘振韬王金玺张友虎中国能源建设集团广东省电力设计研究院有限公司广东广州510663 东南大学土木工程学院江苏南京211189

[目的]文章旨在推动海上风电基础的优化设计,将理论更加完善,模拟结果更加符合实际的高级岩土本构模型推广至实际工程应用。[方法]首先介绍了一种高级本构模型:UH模型(Unified Hardening model,统一硬化本构模型)的理论框架,随后对其进... 详细信息

[目的]文章旨在推动海上风电基础的优化设计,将理论更加完善,模拟结果更加符合实际的高级岩土本构模型推广至实际工程应用。[方法]首先介绍了一种高级本构模型:UH模型(Unified Hardening model,统一硬化本构模型)的理论框架,随后对其进行了面向实际工程应用需求的修正,最后将修正后的模型应用在大直径单桩桩-土分析中,并对结果进行了宏观和单元层面的分析以验证其有效性与实用性。[结果]经过修正和验证,得到了适用于实际工程问题的UH_G0模型。该模型将原始UH模型中的参数“初始孔隙比”替换为“超固结比”;并引入Andersen经验公式,将剪切模量与本构参数κ解耦,显著提升了原始UH模型的初始剪切刚度,使得UH模型对变形(刚度)敏感的边值问题具有适用性。[结论]UH模型作为理论框架清晰,参数物理意义明确的高级本构模型具有较好的实际工程应用潜力。研究进行的面向工程设计需求的两项修正是必要的,二者分别提高了UH模型实际应用于边值问题的便捷性和初始刚度计算的准确性。修正后的UH_G0模型在有限元模拟过程中表现出对实际工程问题良好的有效性与实用性。

关键词：海上风电统一硬化本构模型大直径单桩基础桩-土分析

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网电对抗在无人机反制中的应用

舰船电子对抗 2024年第3期47卷 19-23,29页

作者：安秀娟王兆荣张东坡中国电子科技集团公司第三十六研究所浙江嘉兴314033

分析了发展无人机反制技术的迫切性和必要性,对比了当前反无人机手段的优缺点,指出了现有手段面临的问题,提出利用网电对抗手段进行无人机反制的方向,对后续利用网电对抗并结合智能化技术进行无人机反制的思路进行探讨。

关键词：无人机反制网电对抗智能化技术