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On decoupled or coupled control of bank-to-turn missiles

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Science China(Information Sciences) 2015年第5期58卷 195-207页

作者： duan zhisheng huang lin yang Jianying QIN GuoZheng State Key Lab for Turbulence and Complex Systems and Department of Mechanics and Engineering Science College of Engineering Peking University

In this paper, the differences between decoupled and coupled control of bank-to-turn(BTT) missiles have been studied in detail from three aspects: stabilizability, linear quadratic regulator(LQR) control and tracking control. It is found that for some parameters the BTT missile can be controlled by a decoupled way,especially for stabilizability and LQR control. However, for some others, the BTT missile cannot be decoupled and a coupled control method is needed. Therefore, for a practical flight control system, the decouplability should be studied before giving a decoupled control method. In addition, in order to avoid the disadvantages of LQR control method, an improved H∞controller design method is given. Combined with tracking control problem, a new H∞control method is established for trajectory tracking.

关键词： BTT missile decoupled control coupled control tracking control

H_∞ CONTROL OF NETWORKED MULTI-AGENT SYSTEMS

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Journal of Systems Science & Complexity 2009年第1期22卷 35-48页

作者： Zhongkui LI zhisheng duan lin huang State Key Lab for Turbulence and Complex Systems and Department of Mechanics and Aerospace Engineering College of Engineering Peking University Beijing 100871 China.

This paper concerns the disturbance rejection problem arising in the coordination control of a group of autonomous agents subject to external disturbances. The agent network is said to possess a desired level of disturbance rejection, if the H∞ norm of its transfer function matrix from the disturbance to the controlled output is satisfactorily small. Undirected graph is used to represent the information flow topology among agents. It is shown that the disturbance rejection problem of an agent network can be solved by analyzing the H∞ control problem of a set of independent systems whose dimensions are equal to that of a single node. An interesting result is that the disturbance rejection ability of the whole agent network coupled via feedback of merely relative measurements between agents will never be better than that of an isolated agent. To improve this, local feedback injections are applied to a small fraction of tile agents in the network. Some criteria for possible performance improvement are derived in terms of linear matrix inequalities. Finally, extensions to the case when communication time delays exist are also discussed.

关键词： Coordination control graph theory H∞ control linear matrix inequality (LMI) pinning control.

亚角秒空间分辨的太阳极紫外宽波段成像光谱仪光学设计

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物理学报 2024年第3期73卷 357-369页

作者：黄一帆邢阳光沈文杰彭吉龙代树武王颖段紫雯闫雷刘越李林北京理工大学光电学院北京100081 北京卫星环境工程研究所北京100094 北京空间飞行器总体设计部北京100094 北京宇航系统工程研究所北京100076

狭缝式成像光谱仪是太阳极紫外光谱成像探测的重要工具之一,然而目前国内尚无该类载荷,导致太阳物理学和空间天气学等学科在极紫外光谱诊断研究方面主要依赖国外仪器数据,严重制约了相关学科的发展.国外已发射的成像光谱仪仅具有2"量级... 详细信息

狭缝式成像光谱仪是太阳极紫外光谱成像探测的重要工具之一,然而目前国内尚无该类载荷,导致太阳物理学和空间天气学等学科在极紫外光谱诊断研究方面主要依赖国外仪器数据,严重制约了相关学科的发展.国外已发射的成像光谱仪仅具有2"量级的空间分辨率,很难观测到日冕加热模型预测的等离子体核心特征.为了更好地理解太阳不同层次大气之间的耦合过程,需要更宽光谱覆盖的太阳观测数据.鉴于此,本文提出并设计了一款亚角秒空间分辨的太阳极紫外宽波段成像光谱仪,相比现有仪器,系统能够实现更高空间和光谱分辨率、更宽光谱范围覆盖的观测.性能评价结果表明,系统在62—80 nm,92—110 nm波段内的像元空间分辨率均优于0.4",光谱分辨率均优于0.007 nm,光谱成像质量接近衍射极限,对我国未来首台空间太阳极紫外成像光谱仪的研制具有重要参考价值.

关键词：太阳极紫外光学设计成像光谱仪超环面变线距光栅

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基于角蛋白源特征肽检测优化的角类动物药鉴别研究

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中国中药杂志 2024年第9期49卷 2402-2409页

作者：黄潇正武文星黄思莹包旺林冯旗园赵明段金廒刘睿南京中医药大学江苏省中药资源产业化过程协同创新中心中药资源产业化与方剂创新药物国家地方联合工程研究中心国家中医药管理局中药资源循环利用重点研究室江苏南京210023 动物类中药与功能肽国际合作联合实验室江苏南京210023

由于角蛋白结构稳定,富含角蛋白的角类动物药提取溶解步骤复杂,严重制约了检测效率及通量,该文通过简化角类样品前处理步骤,优化主要角类动物药的特征肽检测方法,提升角类动物药专属性鉴别效率。分别对经/未经碘乙酰胺(IAA)处理的角类... 详细信息

由于角蛋白结构稳定,富含角蛋白的角类动物药提取溶解步骤复杂,严重制约了检测效率及通量,该文通过简化角类样品前处理步骤,优化主要角类动物药的特征肽检测方法,提升角类动物药专属性鉴别效率。分别对经/未经碘乙酰胺(IAA)处理的角类动物药特征肽类进行分析,优化特征肽的离子对条件,并比较经/未经IAA处理的特征肽的保留时间、响应值等数据;采用直接酶解与提取总蛋白后酶解2种前处理方法制备角类动物药样品,基于特征肽保留时间、离子响应值等比较不同方法对羚羊角、水牛角、山羊角及牦牛角样品中特征肽检测的影响。结果表明待测角类样品经直接酶解的简化工艺处理后,均可检测到未经IAA处理的特征肽信息,且与IAA处理后的特征肽相比,其保留时间后移,质谱响应稍有降低;未经IAA处理的特征肽专属性良好,不影响角类动物药的专属性鉴别。综上,可采用直接酶解的工艺处理角类样品,省略蛋白质提取、二硫苏糖醇、IAA试剂处理步骤,显著提高前处理效率,且不影响角类动物药的专属性鉴别,为角类动物药质量研究及标准提升提供了思路与策略。

关键词：角类动物药前处理优化特征肽高效液相色谱-串联质谱法质量控制

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空间太阳极紫外三波段成像光谱仪系统设计

光学学报 2024年第6期44卷 295-307页

作者：段紫雯邢阳光彭吉龙代树武王颖朱成林闫雷黄一帆刘越李林北京理工大学光电学院北京100081 北京卫星环境工程研究所北京100094 北京空间飞行器总体设计部北京100094 北京宇航系统工程研究所北京100076

太阳上层大气,即日冕、过渡区和色球,是由炽热的高度动态的磁化等离子体构成,其中高度电离的离子发射出丰富的极紫外谱线。空间太阳极紫外光谱成像观测对于捕获太阳上层大气中爆发活动的动态物理演化过程,以及实现对大气等离子体特征参... 详细信息

太阳上层大气,即日冕、过渡区和色球,是由炽热的高度动态的磁化等离子体构成,其中高度电离的离子发射出丰富的极紫外谱线。空间太阳极紫外光谱成像观测对于捕获太阳上层大气中爆发活动的动态物理演化过程,以及实现对大气等离子体特征参数的精确测量具有重要的意义。然而现有的极紫外光谱成像仪器只能针对太阳上层大气的一个或两个目标区域进行成像观测,缺乏采用单一仪器对整个太阳上层大气区域在大空间和宽波段尺度范围内的光谱进行诊断的能力,严重制约了人们对太阳爆发活动中的能量及物质输运过程的理解。为了利用单个仪器实现对日冕、过渡区和色球的高分辨率同时诊断观测,本文提出并设计了一款同时工作在17~21 nm、70~80 nm和95~105 nm三个波段的太阳极紫外成像光谱仪,该仪器基于非罗兰圆结构下的椭球面变线距(EVLS)光栅像差校正理论,采用狭缝扫描式成像光谱结构,实现了具有大离轴狭缝视场的高空间、高光谱分辨的消像散光谱成像。基于蒙特卡罗统计模拟方法对太阳极紫外三波段成像光谱仪的最优模型开展光线追迹仿真实验,仿真结果表明,所设计的成像光谱仪取得了良好的光栅像差校正效果,系统空间分辨率优于0.6″,光谱分辨率在17~21 nm波段优于0.006 nm,在70~80 nm和95~105 nm波段优于0.008 nm。本文研究对我国未来的太阳极紫外光谱成像仪器的发展和研制具有重要的理论意义,对我国未来的太阳空间探测任务的型号遴选具有重要的参考价值。

关键词：太阳空间探测太阳极紫外成像光谱仪光栅像差校正光线追迹

The In-Flight Realtime Trigger and Localization Software of GECAM

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Research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-Yun Zhao Shao-lin Xiong Xiang-yang Wen Xin-Qiao Li Ce Cai Shuo Xiao Qi Luo Wen-Xi Peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-Yuan Liao Yan-Qiu Zhang Yue huang Lu Li Xing Wen Fei Zhang Jing duan Chen-Wei Wang Dong-Li Shi Peng Zhang Qi-Bin Yi Chao-yang Li Yan-Bing Xu Xiao-Hua Liang Ya-Qing Liu Da-Li Zhang Xi-Lei Sun Fan Zhang Gang Chen Huan-Yu Wang Sheng yang Xiao-Jing Liu Min Gao Mao-Shun Li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong Liu Xing-Bo Han Jin-ling Qi Jia huang Ke-Ke Zhang Can Chen Xiong-Tao yang Dong-Jie Hou Yu-Sa Wang Rui Qiao Xiang Ma Xiao-Bo Li Ping Wang Xin-ying Song Li-Ming Song Shi-Jie Zheng Bing Li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-Jun Wang Yan-Chao Hao Xiang-Yu Wang Zong-Yuan yang Zhi-Long Wen Zhi Chang Yuan-Yuan Du Rui Gao Xiao-Fei Lan Yan-Guo Li Gang Li Xu-Fang Li Fang-Jun Lu Hong Lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-Peng Xu Jia-Wei yang Xue-Juan yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar Physics and Department of Physics Xiangtan UniversityXiangtan 411105China Physics and Space Science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun University of Science and Technology Changchun 130022China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

Realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CPU of the GECAM Electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

TWO KINDS OF HARMONIC PROBLEMS IN CONTROL SYSTEMS

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Journal of Systems Science & Complexity 2009年第4期22卷 587-596页

作者： zhisheng duan lin huang State Key Lab for Turbulence and Complex Systems and Department of Mechanics and Aerospace Engineering,College of Engineering,Peking University,Beijing 100871,China. State Key Lab for Turbulence and Complex Systems and Department of Mechanics and Aerospace Engineering College of Engineering Peking University Beijing China

This paper discusses the harmonic problems in control systems from two aspects:Oneis the harmonic control among different subsystems,and the other is the harmonic control amongmultiple *** intrinsic problems in such systems are *** is pointed out that somesubsystems must be unstable to stabilize the whole interconnected system by an *** discrete-time multi-input systems,a necessary and sufficient condition is presented for the strictdecrease of the quadratic optimal performance index with the control input *** showsan essential difference between single-input and multi-input control ***,some futureresearch directions are discussed in harmonic control of interconnected systems,allocation of multi-control inputs,fault-tolerant control,and fault-diagnosis.

关键词： Interconnected system quadratic optimal control redundant inputs Riccati equation simplectic matrix.

Dynamic Properties of Two-Dimensional Polydisperse Granular Gases

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Communications in Theoretical Physics 2007年第2X期48卷 343-347页

作者： LI Rui ZHANG duan-Ming huang Ming-Tao SU Xiang-ying CHEN Zhi-Yuan ZHU Hong-ying ZHANG lin Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

We propose a two-dimensional model of polydisperse granular mixtures with a power-law size distribution in the presence of stochastic driving. A fractal dimension D is introduced as a measurement of the inhomogeneity of the size distribution of particles. We define the global and partial granular temperatures of the multi-component mixture. By direct simulation Monte Carlo, we investigate how the inhomogeneity of the size distribution influences the dynamic properties of the mixture, focusing on the granular temperature, dissipated energy, velocity distribution, spatial clusterization, and collision time. We get the following results： a single granular temperature does not characterize a multi-component mixture and each species attains its own ＂granular temperature＂; The velocity deviation from Gaussian distribution becomes more and more pronounced and the partial density of the assembly is more inhomogeneous with the increasing value of the fractal dimension D; The global granular temperature decreases and average dissipated energy per particle increases as the value olD augments.

关键词： fractal fractal dimension polydisperse mixture

Therapeutic effect of curcumin on experimental colitis mediated by inhibiting CD8^+ CD11c^+ cells

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World Journal of Gastroenterology 2017年第10期23卷 1804-1815页

作者： Hai-Mei Zhao Fei Han Rong Xu Xiao-ying huang Shao-Min Cheng Min-Fang huang Hai-yang Yue Xin Wang Yong Zou Han-lin Xu duan-Yong Liu School of Basic Medical Sciences Jiangxi University of Traditional Chinese Medicine College of Pharmacy Jiangxi University of Traditional Chinese Medicine College of Pharmacy Hubei University of Traditional Chinese Medicine Department of Postgraduate Jiangxi University of Traditional Chinese Medicine Key Laboratory of Modern Preparation of TCM Ministry of EducationJiangxi University of Traditional Chinese Medicine Collaborative Innovation Center of TCM of New Products for Geriatrics Science and Technology College Jiangxi University of Traditional Chinese Medicine

AIM To verify whether curcumin (Cur) can treat inflammatory bowel disease by regulating CD8(+)CD11c(+) cells. METHODS We evaluated the suppressive effect of Cur on CD8(+)CD11c(+) cells in spleen and Peyer's patches (PPs) in colitis induced by trinitrobenzene sulfonic acid. Mice with colitis were treated by 200 mg/kg Cur for 7 d. On day 8, the therapeutic effect of Cur was evaluated by visual assessment and histological examination, while co-stimulatory molecules of CD8(+)CD11c(+) cells in the spleen and PPs were measured by flow cytometry. The levels of interleukin (IL)-10, interferon (IFN)-gamma and transforming growth factor (TGF)-beta 1 in spleen and colonic mucosa were determined by ELISA. RESULTS The disease activity index, colon weight, weight index of colon and histological score of experimental colitis were obviously decreased after Cur treatment, while the body weight and colon length recovered. After treatment with Cur, CD8(+)CD11c(+) cells were decreased in the spleen and PPs, and the expression of major histocompatibility complex., CD205, CD40, CD40L and intercellular adhesion molecule-1 was inhibited. IL-10, IFN-gamma and TGF-beta 1 levels were increased compared with those in mice with untreated colitis. CONCLUSION Cur can effectively treat experimental colitis, which is realized by inhibiting CD8(+)CD11c(+) cells.

关键词： CD8 CD11c Curcumin Experimental colitis Therapeutic effect