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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 250-259页

作者： Ying SUN Miaomiao FU Jingyang MAO guoliang wei Business School University of Shanghai for Science and TechnologyShanghai200093China Shanghai Caoyang Vocational School Shanghai200333China School of Electrical and Electronic Engineering Shanghai Institute of TechnologyShanghai201418China School of Intelligent Emergency Management University of Shanghai for Science and TechnologyShanghai200093China

Cyber-physical systems(CPSs)take on the characteristics of both multiple rates of information collection and processing and the dependency on information *** purpose of this paper is to develop a joint recursive filtering scheme that estimates both unknown inputs and system states for multi-rate CPSs with unknown *** cyberspace,the information transmission between the local joint filter and the sensors is governed by an adaptive event-triggered ***,the desired parameters of joint filters are determined by a set of algebraic matrix equations in a recursive way,and a sufficient condition verifying the boundedness of filtering error covariance is found by resorting to some algebraic operation.A state fusion estimation scheme that uses local state estimation is proposed based on the covariance intersection(CI)based fusion ***,an illustrative example demonstrates the effectiveness of the proposed adaptive event-triggered recursive filtering algorithm.

关键词： Cyber-physical systems Multi-rate Joint recursive filtering Adaptive event-triggered mechanisms Unknown inputs

多元(U,Zr, Nb)C燃料制备技术与性能机理研究

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原子能科学技术 2024年第1期58卷 166-174页

作者：吴学志魏国良郭骁中国原子能科学研究院反应堆工程技术研究所北京102413

多元(U,Zr, Nb)C燃料因具有熔点高、热导率高、低裂变气体释放率及优异的高温力学性能等优点,是目前大功率空间核推进反应堆选用燃料之一。本文采用碳热还原和液相烧结相结合的粉末冶金工艺制备多元(U,Zr, Nb)C燃料芯块,研究了工艺参数... 详细信息

多元(U,Zr, Nb)C燃料因具有熔点高、热导率高、低裂变气体释放率及优异的高温力学性能等优点,是目前大功率空间核推进反应堆选用燃料之一。本文采用碳热还原和液相烧结相结合的粉末冶金工艺制备多元(U,Zr, Nb)C燃料芯块,研究了工艺参数对烧结芯块反应动力学、相结构、导热性能和微观结构的作用机制和影响规律。结果表明:在1 800℃、50 MPa和1 h的烧结条件下,通过添加0.5%金属铀形成的液相烧结工艺制备得到芯块密度可达95.5%TD;当原料M/C(M为金属元素总量)摩尔比为1∶6.5时,可制备得到M/C比为1的正化学计量碳化物燃料;(U0.2,Zr, Nb)C的晶格常数比(U0.1,Zr, Nb)C的晶格常数略高;多元(U,Zr, Nb)C碳化物燃料芯块热导率与相成分、密度和温度均有关;芯块气孔分布较均匀,没有联通的开气孔存在,气孔尺寸在1~3μm。

关键词：多元核推进燃料碳热还原液相烧结

Dynamic Event-Triggered Control of Continuous-Time Systems With Random Impulses

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IEEE/CAA Journal of Automatica Sinica 2023年第12期10卷 2292-2299页

作者： Meng Yao guoliang wei the College of Science University of Shanghai for Science and TechnologyShanghai 200093China the Business School University of Shanghai for Science and TechnologyShanghai 200093China

In this paper,the networked control problem under event-triggered schemes is considered for a class of continuoustime linear systems with random *** order to save communication costs and lighten communication burden,a dynamic event-triggered scheme whose threshold parameter is dynamically adjusted by a given evolutionary rule,is employed to manage the transmission of data ***,the evolution of the threshold parameter only depends on the sampled measurement output,and hence eliminates the influence of impulsive signals on the event-triggered ***,with the help of a stochastic analysis method and Lyapunov theory,the existence conditions of desired controller gains are received to guarantee the corresponding input-to-state stability of the addressed ***,according to the semi-definite programming property,the desired controller gains are calculated by resorting to the solution of three linear matrix *** the end,the feasibility and validity of the developed control strategy are verified by a simulation example.

关键词： mechanism. desired hence

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基于嵌套剖分的位姿图分层优化算法

计算机应用研究 2024年第6期41卷 1916-1920页

作者：简单魏国亮蔡洁王耀磊上海理工大学理学院上海200093 上海理工大学管理学院上海200093

位姿图优化(pose graph optimization,PGO)是一种在同时定位与地图构建(simultaneous localization and mapping,SLAM)后端优化中常用的高维非凸优化算法,通常建模成极大似然估计。由于目前的PGO算法优化大规模大噪声数据集时很难在保... 详细信息

位姿图优化(pose graph optimization,PGO)是一种在同时定位与地图构建(simultaneous localization and mapping,SLAM)后端优化中常用的高维非凸优化算法,通常建模成极大似然估计。由于目前的PGO算法优化大规模大噪声数据集时很难在保证精度的同时提升速度,所以提出了一种基于嵌套剖分的位姿图分层优化算法。该算法首先建立不同距离度量的χ2检验模型,进而剔除异常值点。然后利用嵌套剖分算法将位姿图分割成一组子图,再从这些子图中提取出一个表示原SLAM问题的抽象拓扑的骨架图,从而优化该骨架图,完成初始化。最后在模拟和真实的位姿图数据集上进行实验评估,结果表明该算法在不影响精度的情况下,可以提高算法的计算速度,具有可伸缩性。

关键词：位姿图优化嵌套剖分噪声 χ2检验最大似然估计

针对大噪声的三维SLAM位姿图鲁棒优化算法

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控制工程 2024年第7期31卷 1305-1313页

作者：王苗苗魏国亮蔡洁李雨洁上海理工大学理学院上海200093 上海理工大学管理学院上海200093

位姿图优化(pose graph optimization,PGO)是同时定位与建图(simultaneous locali-zation and mapping,SLAM)中非常重要的非凸高维优化工具。运动位姿初始化是PGO过程中的关键步骤。针对目前的初始化算法无法为大噪声PGO数据集提供较好... 详细信息

位姿图优化(pose graph optimization,PGO)是同时定位与建图(simultaneous locali-zation and mapping,SLAM)中非常重要的非凸高维优化工具。运动位姿初始化是PGO过程中的关键步骤。针对目前的初始化算法无法为大噪声PGO数据集提供较好初始值的问题,首先提出一种新的鲁棒核函数,解决大噪声带来的估计值与观测值之间的大残差问题;然后,提出一种基于迭代重加权最小二乘的位姿图鲁棒优化算法。蒙特卡罗实验结果表明,所提算法在大噪声环境中具有较好的鲁棒性和精确性,所提鲁棒核函数与其他经典核函数相比更具适用性,能够加快算法收敛。

关键词：三维SLAM PGO 鲁棒核函数迭代重加权最小二乘

Adaptive event-triggered state estimation for large-scale systems subject to deception attacks

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Science China(Information Sciences) 2022年第2期65卷 139-154页

作者： Hanchen XIAO Derui DING Hongli DONG guoliang wei College of Science University of Shanghai for Science and Technology Department of Control Science and Engineering University of Shanghai for Science and Technology School of Software and Electrical Engineering Swinburne University of Technology Institute of Complex Systems and Advanced Control Northeast Petroleum University

This paper addresses state estimation issues of large-scale systems with measurements subject to deception attacks, where the communication topology among sub-estimators is the same as the physical coupling structure of the subsystems. In consideration of the limited channel bandwidth, a novel adaptive event-triggered scheme is proposed for governing the data transmission among sub-estimators. With the help of Lyapunov analysis approaches, sufficient conditions are derived to ensure the input-to-state stability of the dynamics of estimation errors. Meanwhile, the bound of the estimation errors is obtained in the mean-square sense. The desired estimator parameters are presented in an analytical form dependent on the solution of a set of matrix inequalities. The developed scheme is related to the local information of the subsystems and thus satisfies the requirement of scalability. Finally, a simulation example of power systems is given to reveal the usefulness and effectiveness of the developed design scheme.

关键词： large-scale discrete-time systems adaptive event-triggering communication Adaptive event-triggering communication deception attacks input-to-state stability power systems

Consensus Control for Multiple Euler-Lagrange Systems Based on High-Order Disturbance Observer:An Event-Triggered Approach

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 945-948页

作者： Xinchen Guo guoliang wei Meng Yao Pengju Zhang Department of Control Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Business School University of Shanghai for Science and TechnologyShanghai 200093China College of Science University of Shanghai for Science and TechnologyShanghai 200093China

Dear editor,This letter addresses the leader-following consensus problem(LFCP)for multiple Euler-Lagrange(EL)systems with a directed ***,a local high-order disturbance observer(HODO)is put forward to estimate the compound disturbance for each EL system itself,and the estimate error can ultimately achieve *** on this HODO,an event-based distributed sliding mode control protocol is proposed to solve the LFCP of multiple EL ***,the reachability of the sliding mode surface is ***,it should be pointed out that the interval between any two triggering instants is a strictly positive value,hence the well-known Zeno behavior is avoided for the developed event-based ***,the effectiveness of the proposed HODO and control protocol is further verified by a numerical simulation.

关键词： disturbance hence editor

磁化混凝机械膜反应器在工业废水处理中的应用研究

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工程技术研究 2024年第4期9卷 103-105页

作者：魏国亮邱朋朋青岛海晏环境技术工程有限公司山东青岛266200

随着我国经济的迅猛发展,工业领域产生的废水量显著提升,若直接排放工业废水,会对自然环境造成较大破坏,严重危害人类的生活与生存环境。所以,排放工业废水前,应采取科学、合理的方式进行废水处理,磁化混凝机械膜是较为常见的一种处理... 详细信息

随着我国经济的迅猛发展,工业领域产生的废水量显著提升,若直接排放工业废水,会对自然环境造成较大破坏,严重危害人类的生活与生存环境。所以,排放工业废水前,应采取科学、合理的方式进行废水处理,磁化混凝机械膜是较为常见的一种处理方式。基于此,文章以某工业企业为研究对象,简单介绍该企业产生的废水情况,随后详细分析了基于磁化混凝机械膜反应器的工业废水厌氧处理工艺及其应用效果。结果显示,磁化混凝机械膜具有良好的去污效果,可大规模推广。

关键词：磁化混凝机械膜反应器工业废水厌氧处理工艺

Consensus Control of Multi-Agent Systems Using Fault-Estimation-in-the-Loop:Dynamic Event-Triggered Case

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IEEE/CAA Journal of Automatica Sinica 2022年第8期9卷 1440-1451页

作者： Yamei Ju Derui Ding Xiao He Qing-Long Han guoliang wei Shanghai Key Lab of Modern Optical System the Department of Control Science and EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China Department of Control Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia Department of Automation BNRistTsinghua UniversityBeijing 100084China College of Science University of Shanghai for Science and TechnologyShanghai 200093China

The paper develops a novel framework of consensus control with fault-estimation-in-the-loop for multi-agent systems(MASs)in the presence of faults.A dynamic event-triggered protocol(DETP)by adding an auxiliary variable is utilized to improve the utilization of communication ***,a novel estimator with a noise bias is put forward to estimate the existed fault and then a consensus controller with fault compensation(FC)is adopted to realize the demand of reliability and safety of addressed ***,a novel consensus control framework with fault-estimation-in-the-loop is developed to achieve the predetermined consensus performance with the l_(2)-l_(∞)constraint by employing the variance analysis and the Lyapunov stability ***,the desired estimator and controller gains are obtained in light of the solution to an algebraic matrix equation and a linear matrix inequality in a recursive way,***,a simulation result is employed to verify the usefulness of the proposed design framework.

关键词： Consensus control dynamic event-triggered protocol(DETP) fault compensation(FC) fault estimation multi-agent systems(MASs)

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带式焙烧机台车车体热力耦合仿真计算

烧结球团 2024年第2期49卷 53-58页

作者：刘曙光师伟王国强魏国良温荣耀王建平宁江波内蒙古包钢钢联股份有限公司内蒙古包头014010 中冶长天国际工程有限责任公司湖南长沙410205

为揭示带式焙烧机台车车体在低温-高温-低温循环往复工况下温度场和各种荷载对车体主梁变形和应力的影响规律,本文以国内某钢铁企业带式焙烧机台车车体为研究对象,利用ANSYS有限元分析软件,采用直接热力耦合方法,对带式焙烧机台车车体... 详细信息

为揭示带式焙烧机台车车体在低温-高温-低温循环往复工况下温度场和各种荷载对车体主梁变形和应力的影响规律,本文以国内某钢铁企业带式焙烧机台车车体为研究对象,利用ANSYS有限元分析软件,采用直接热力耦合方法,对带式焙烧机台车车体在干燥段、预热段、焙烧段、均热段、一冷段和二冷段工作过程的温度分布进行分析,计算焙烧段台车车体在静力作用和热力耦合作用两种工况条件下的变形和应力,分析不同横梁高度、焙烧温度对台车主梁应力和变形的影响规律。结果表明:焙烧段台车车体的最高温度为650℃,上、下表面最大温差为140℃,上表面为压应力,下表面为拉应力,最大应力位置在主梁中间,为21.6 MPa,最大垂向变形为5.37 mm。本文通过仿真计算获得了不同横梁高度、焙烧温度对台车主梁应力和变形的影响关系,可为带式焙烧机台车车体的优化设计提供依据。

关键词：带式焙烧机台车有限元法热力耦合应力应变

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