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第41届中国控制会议

作者： Robert Maniarski Wojciech Paszke Shoulin Hao Hongfeng Tao Institute of Automation Electronic and Electrical EngineeringUniversity of Zielona Góra Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology Key Laboratory of Advanced Process Control for Light Industry of Ministry of Education Jiangnan University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

This paper develops PD-type iterative learning control schemes for a class of uncertain batch processes subject to nonrepetitive *** means of two-dimensional/repetitive setting,the sufficient conditions for batch-to-batch error convergence and H disturbance attenuation are formulated and ***,the procedure for computing the desired control law matrices is formulated in terms of solvability of linear matrix *** proposed control law is able to fulfil the imposed design specifications,i.e.,they are suitable for the batch processes with time-varying uncertainties as well as non-repetitive *** illustrative example is used to validate the proposed control scheme and demonstrates a possible applicability of the developed results.

关键词： iterative learning control repetitive processes batch processes robust control nonrepetitive disturbances

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MXene Ti_(3)C_(2) decorated g-C_(3)N_(4)/ZnO photocatalysts with improved photocatalytic performance for CO_(2) reduction

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Nano Materials Science 2023年第2期5卷 237-245页

作者： Jianxin Li Yuhua Wang Yitong Wang Yao Guo Shiding Zhang Haixiang Song xianchang Li Qianqian Gao Wanyu Shang Shuaishuai Hu Huibin Zheng xifei Li Hubei Province Key Laboratory of Science in Metallurgical Process Wuhan University of Science and TechnologyWuhan430081China Henan Joint International Research Laboratory of Nanocomposite Sensing Materials Anyang Institute of TechnologyAnyang455000China School of Intelligent Manufacturing Huzhou313000China Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation School of Materials Science and EngineeringXi'an University of TechnologyXi'an710048China Engineering Research Center of Conducting Materials and Composite Technology Ministry of EducationXi'an710048China Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) Zhengzhou UniversityZhengzhou450001China

Photocatalytic reduction of CO_(2) is considered as a kind of promising technologies for solving the greenhouse ***,a novel hybrid structure of g-C_(3)N_(4)/ZnO/Ti_(3)C_(2) photocatalysts was designed and fabricated to investigate their abilities for CO_(2) *** demonstration,heterojunction of g-C_(3)N_(4)/ZnO can improve photogenerated carriers’separation,the addition of Ti_(3)C_(2) fragments can further facilitate the photocatalytic performance from CO_(2) to ***,g-C_(3)N_(4)/ZnO/Ti_(3)C_(2) has efficiently increased CO production by 8 and 12 times than pristine g-C_(3)N_(4) and ZnO,*** is ascribed to the photogenerated charge migration promoted by metallic Ti_(3)C_(2).This work provides a guideline for designing efficient hybrid catalysts on other applications in the renewable energy fields.

关键词： Ti_(3)C_(2)fragments ZnO G-C_(3)N_(4) CO_(2)reduction

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Analysis of coupled axial-torsional vibration of drill-string with an inclination angle 41

Analysis of coupled axial-torsional vibration of drill-strin...

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第41届中国控制会议

作者： Jiahao Zhang Chengda Lu Hengyu Huang Jun Gao Min Wu School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education CCTEG Xi'an Research Institute

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Drill-string vibration has a great negative influence on the safety and efficiency of geological *** that the influence of drill-string inclination is not well considered in the literature,this paper develops a novel drill-string vibration model for geological drilling with inclined ***,the correlation between the inclination angle of borehole and the axial and torsional forces on the drill-string is *** on this,a drill-string motion model with the parameters of inclination angle is ***,the bit-rock interaction is considered as two processes,axial cutting and torsional friction,and an axial-torsional coupled bit-rock interaction model with state-dependent time delay is *** combining the established drill-string motion model and bit-rock interaction model,a coupled axial-torsional vibration model of drill-string in inclined borehole is obtained with the effect of borehole wall friction taken into *** drill-string vibration model proposed in this paper is more general,and includes the existing coupled drill-string vibration model of vertical borehole,which is closer to the actual situation.

关键词： drill-string vibration drill-string inclination bit-rock interaction

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The Mode Order Determination of Covariance-Driven Stochastic Subspace Identification Based on Exponential Functions for Engineering Structures

SSRN

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SSRN 2022年

作者： Wang, Youming Zhang, Yafei School of Automation Xi’an Key Laboratory of Advanced Control and Intelligent Process Xi’an University of Posts and Telecommunications Xi’an710121 China

As the noise interference in the raw input data causes the error of singular value decomposition of Hankel matrices in stochastic subspace identification (SSI) algorithm, it is difficult to accurately determine the mode order and identify the engineering structural *** address the problem, a mode order determination method is proposed for enhance covariance driven stochastic subspace identification (ECOV-SSI) algorithm in the modal analysis of engineering structures, where exponential increment entropy theory is employed to construct the relationship between the eigenvalue entropy and the mode order. The mode order is determined from the minimum eigenvalue entropy increment. For the selection of Toeplitz matrix row number of ECOV-SSI algorithm influences the identification accuracy, the comparative analysis between power spectral density (PSD) estimation and stabilization diagram is described to determine the row number of the Toeplitz matrix and avoid mode absence. The modal analysis experiments on the frame and bridge verifies the accuracy and effectiveness of the proposed method compared to traditional SSI and Data-SSI methods. © 2022, The Authors. All rights reserved.

关键词： Entropy

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Research on Whole-Link Risk Situational Awareness Index System and Dynamic Risk Pool Supervision 11

Research on Whole-Link Risk Situational Awareness Index Syst...

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11th International Conference on Networks, Communication and Computing, ICNCC 2022

作者： Sun, Jingchun Deng, Fei Du, Boya School of Management Xi'An Jiaotong University China Key Laboratory of the Ministry of Education for Process Control and Efficiency Engineering China College of Information Engineering Kunming University China Key Laboratory of Data Governance and Intelligent Decision Universities of Yunnan China

ISBN: (纸本)9781450398039

With the development of society, network security becomes more and more important. It is inevitable to establish the risk index system to effectively monitor the security of network. In the previous study, due to absence of risk indicators, the risk supervising system is not perfect. However, there are few researches on the whole-link risk index system, and the determination of risk indicators lacks basis. Therefore, this paper firstly constructs a new risk index system of situational awareness, which can avoid the omission of risk indicators. Then the sliding window is used to observe this system and the optimal window width is found to determine the dynamic risk pool. Finally, the indicators of dynamic risk pool are used to dynamically monitor the whole link risk index system. The whole technical framework not only proves advantages of the mature risk index system of situational awareness, but also overcomes the disadvantage that the risk index of the whole link cannot be determined, and the dynamic risk pool has the sharing characteristics in the whole process. © 2022 ACM.

关键词： Network security

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The Variation Characteristics of the Spread-F Occurrences at xi'an in Northwest China 13

The Variation Characteristics of the Spread-F Occurrences at...

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13th International Symposium on Antennas, Propagation and EM Theory, ISAPE 2021

作者： Wang, Ning Junsuo, Q Wu, Qing Xi'an Key Laboratory of Advanced Control and Intelligent Process Xi'an University of Posts and Telecommunications China School of Automation Xi'an University of Posts and Telecommunications 618 West Chang'an Street Chang'an District Xi'an710121 China

ISBN: (纸本)9781665418126

Ionospheric spread-F is a subject widely studied by scholars at home and abroad in recent decades. Its occurrence probability is affected by solar activity, geomagnetic activity, season and other factors. Due to its geographical location, xi'an has become one of the most representative cities in Northwest China. Therefore, studying the variation characteristics of spread-F occurrence probabilities in xi'an has important strategic significance for ionospheric research in China. This paper introduces the ionoapheric observation data of xi'an (34.13°N, 108.83°E) in the mid-latitude of China, and studies the occurrence rate and monthly and seasonal variation characteristics of spread-F during 2011. FSF and RSF frequently occurred during summer at xi'an. The results show that in the middle latitude, the start time of spread-F is about 21 LT and continues to 05 LT. Both the higher occurrences of FSF and RSF are mainly appeared at 22, Oland 04 local times. The probability of RSF occurring at some time in winter is higher than that in spring and autumn. Although some of the results of this paper are slightly different from the previous research results, most of the results indirectly verify the previous research results. All these results are of great significance for us to understand the variation characteristics of ionospheric irregularities in China and improve the ability of space weather prediction. However, the great difference of occurrences in xi'an station is striking and worth further studying. © 2021 IEEE.

关键词： Probability

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Tracking performance limitations of MIMO discrete-time networked control systems with multiple constraints

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Science China(Information Sciences) 2023年第8期66卷 267-268页

作者： xiaowei JIANG Bin ZHANG xiangyong CHEN Huaicheng YAN School of Automation China University of Geosciences Key Laboratory of Industrial Internet of Things & Networked Control Ministry of Education Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education School of Automation and Electrical Engineering Linyi University Key Laboratory of Smart Manufacturing in Energy Chemical Process of the Ministry of Education

Dear editor,Networked control systems(NCSs) have attracted widespread attention in some fields because they offer the advantages of reduced cabling, greater resource sharing,and ease of installation and maintenance [1]. However, in an unreliable network environment, network constraints can significantly limit the performance of NCSs.

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Research on Data Encryption in Lightweight Embedded Web Server 10

Research on Data Encryption in Lightweight Embedded Web Serv...

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10th International Conference on control, Automation and Information Sciences, ICCAIS 2021

作者： Li, Pengfei Qu, Junsuo Shi, Haonan Xi'an University of Posts Telecommunications School of Automation Xi'an China Xi'an University of Posts Telecommunications Xi'an Key Laboratory of Advanced Control and Intelligent Process School of Automation Xi'an China Xi'an University of Posts Telecommunications School of Communication and Information Engineering Xi'an China

ISBN: (纸本)9781665440295

From the perspective of reducing the configuration complexity of IoT device parameters and improving data security, a lightweight embedded Web server is designed based on the TencentOS tiny operating system to reduce the hardware requirements of the embedded Web server design. In order to improve the security and transmission reliability of IoT monitoring data, a mechanism for data encryption is proposed. Embedded Elliptic Curve Cryptography (ECC) in Flash inside the chip to ensure the security of key data during transmission. The data monitoring platform receives and decrypts the received data, and stores the data into a database server after processing. The experimental results show that the security of data transmission and reached the expected goals. © 2021 IEEE.

关键词： Internet of things

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Design of an intelligent Monitoring System for Operating States in a Coal Mine Drilling process 41

Design of an Intelligent Monitoring System for Operating Sta...

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第41届中国控制会议

作者： xiao Yang Luefeng Chen Sheng Du Chengda Lu Wangnian Li Min Wu School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Xi'an Research Institute Co.Ltd. China Coal Technology and Engineering Group

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

With the development trend of intelligent drilling in coal mines,an intelligent monitoring system for operating states in a drilling process is developed to solve the problems of incomplete display of drilling parameters and ineffective *** system realizes the remote monitoring of drilling *** mainly adopts the Fuzzy C-Means clustering algorithm to cluster the drilling *** it combines expert empirical knowledge to classify coal seams into soft,hard and alternating soft and hard coal *** boundary values are calculated according to the boundary ***,three drilling operating states,rated,conservative and over-excited,are judged to provide guidance for the drilling process control.

关键词： Drilling process intelligent monitoring Fuzzy C-Means clustering Operating states

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Design of An intelligent control System for Underground Directional Drilling Trajectory in Coal Mines 41

Design of An Intelligent Control System for Underground Dire...

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第41届中国控制会议

作者： Wangnian Li Min Wu Ke Yao Quanxin Li Chengda Lu Sheng Du School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Xi'an Research Institute Co.Ltd. China Coal Technology and Engineering Group

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Directional drilling trajectory control technology is one of the key technologies to realize automation and intelligence of underground tunnel drilling in coal *** construction of directional drilling in underground coal mines mainly relies on manual observation of measurement-while-drilling parameters to control the drilling trajectory,which is highly dependent on manual *** paper designs an intelligent control system of underground directional drilling trajectory for coal *** the idea of hierarchical design and modular design,this system collects and displays geometric parameters,geological parameters,and engineering parameters of the directional drilling ***,an intelligent decision-making platform for directional drilling trajectory prediction and control is developed,laying a foundation for the research of directional drilling trajectory prediction and intelligent control for coal mines.

关键词： Trajectory prediction trajectory control geometric parameters geological parameters engineering parameters

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