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2024 Conference of Young Researchers in Electrical and Electronic engineering, ElCon 2024

作者： Guz, Egor E. Zhamaladin, Zhasulan T. Kisel, Natalia N. Southern Federal University Institute of Radio Engineering Systems and Control Taganrog Russia

ISBN: (纸本)9798350360646

The results of modeling in the Altair FEKO environment the characteristics of a low-profile ultra-wideband microstrip monopole antenna for an unmanned aerial vehicle in the range of 3.5 - 16 GHz are presented. The influence of the geometric parameters of the antenna on its characteristics has been studied. The results of numerical modeling were verified with experimentally obtained data. It has been shown that it is possible to achieve an SWR of no higher than 2 with a successful choice of the geometric lengths of the antenna elements in the range of 3.5 GHz - 16 GHz. © 2024 IEEE.

关键词： conformal antenna low profile antenna monopole antenna ultra-wideband antenna unmanned aerial vehicle

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Design of Ultra-Wideband Microstrip Antenna for Wireless Communication Networks 9

Design of Ultra-Wideband Microstrip Antenna for Wireless Com...

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9th IEEE All-Russian Microwave Conference, RMC 2024

作者： Zhamaladin, Zhasulan T. Guz', Egor E. Kisel', Natalya N. Institute of Radio Engineering Systems and Control Southern Federal University Taganrog Russia

ISBN: (纸本)9798331540944

This paper presents a study of a low-profile printed microstrip UWB antenna in the frequency range of 4-15 GHz. The results of investigation of the characteristics of the UWB antennas (VSWR, gain, Radiation pattern characteristic, RCS) with different geometry of ground surfaces are presented. Several models of antennas are made, the comparative analysis of calculation results of experimental samples with their numerical models is carried out. A good agreement between the results of mathematical modeling and experimental characteristics of real antenna samples is shown. The influence of the substrate shape on the reduction of scattering characteristics of antennas is analyzed. Applying the presented topologies of the ground surface, makes possible to extend the operating frequency range of the antenna without using additional matching elements and reducing antenna dimensions. For this model, the operating frequency range was 2.7 GHz to 13 GHz, and it is realized only by modifying the shape of the ground surface. © 2024 IEEE.

关键词： Ultra-wideband (UWB)

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CAD Modeling and Experimental Studies of Characteristics Broadband Antenna with CSRR Resonator 25

CAD Modeling and Experimental Studies of Characteristics Bro...

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25th IEEE International Conference of Young Professionals in Electron Devices and Materials, EDM 2024

作者： Guz, Egor E. Zhamaladin, Zhasulan T. Kisel, Natalia N. Institute of Radio Engineering Systems and Control Southern Federal University Taganrog Russia

ISBN: (纸本)9798350389234

This paper presents the results of modeling of a low-profile ultra-wideband microstrip monopole antenna with CSRR resonator in the range of 2-18 GHz. The antenna characteristics were calculated using specialized CAD software Altair FEKO. The paper presents the results of modeling and analysis of an ultra-wideband microstrip antenna with emphasis on the effect of including a double open-loop resonator on its characteristics. The performance of different antennas is compared. The results show that the inclusion of a CSRR resonator in the antenna design leads to the appearance of rejection zones, the position of which can be changed by varying the size of the resonator. In addition, real antenna designs with and without CSRR resonators have been developed and tested, and the performance of real antenna designs has been compared with numerical simulation results. Measurements of antenna directivity characteristics, frequency dependences of reflection coefficient and input impedance were carried out at the Center for Collective Use "Applied Electrodynamics and Antenna Measurements" of the Southern Federal University. The results of experimental studies fully correlate with the results of modeling, and confirm the appearance of the rejection zone in the frequency region of 6 GHz due to the use of CSRR resonator. © 2024 IEEE.

关键词： Ultra-wideband (UWB)

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Distributed Consensus control of Nonlinear Multiagent systems With Output Noises Via a Switching Classification Approach

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IEEE Transactions on Automatic control 2025年第6期70卷 4132-4139页

作者： Li, Kuo Ding, Steven X. Hua, Changchun Li, Yafeng Yang, Yana Yanshan University School of Electrical Engineering Qinhuangdao066004 China University of Duisburg-Essen Institute for Automatic Control and Complex Systems Duisburg47057 Germany

This paper explores the distributed leader-following consensus control problem of nonlinear multiagent systems subject to stochastic output sensing noises under a fixed directed topology. Different from existing research, we pay attention to the effect of multiplicative stochastic noises on the sensors, and the noise intensity can be described as an unknown time-varying function with an arbitrarily large bound. In this condition, we put forward the noise intensity classification-based distributed output feedback consensus approach. First, we divide the noise intensity into small-noise intensity and large-noise intensity by designing a demarcation constant, and we introduce the switching property to distinguish them. Then, for the follower, we design the distributed controller based on the established compensator utilizing relevant outputs, and we produce sufficient conditions for the controller to be implemented. Subsequently, a unified Lyapunov function is constructed to prove that all agents can realize the full-state exponential consensus in mean square under the action of the controller. Finally, the simulation example is provided to demonstrate the efficiency of our approach. © 1963-2012 IEEE.

关键词： Lyapunov functions

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A novel method based on the calculus of variations to optimize the cooling passage configuration in thermal protection structure 2

A novel method based on the calculus of variations to optimi...

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2023 2nd International Conference on Aerospace and control engineering, ICoACE 2023

作者： Li, Xuan Wu, Shujie Zhang, Qun Li, Xin Chen, Shiqiang Beijing Institute of Astronautical Systems Engineering Beijing100076 China Beijing Institute of Control Engineering Beijing100094 China

A novel method based on the calculus of variations to obtain the optimization of cooling structure was developed in this work. The optimization of heat sink designs for better heat-dissipating effects has been researched substantially. However, the optimization of cooling passage configurations in thermal protection structures to improve the comprehensive heat transfer performance has remained a long-term interest and unsolved problem for researchers. Due to the intrinsic complexity, the laminar flow is usually considered before while the turbulent flow is seldom treated. It is valuable to provide timely and effective solutions to optimize the cooling structure, where the turbulent flow is involved, for practical use. A novel method to optimize cooling structure based on the calculus of variations has been developed to meet this need. The average temperature, temperature inhomogeneity, and coolant flow pressure drop were chosen as objective functions. The cooling channels can be established depending on the geometric and thermal boundary conditions of the structure, and then the quasi-three-dimensional simulation of the fluid/solid coupling field was calculated to get the temperature distribution of the cooling structure, the pressure drop, etc. Hence, this work explores the feasibility of combining coupled heat transfer and the calculus of variations to realize optimal cooling channels. By the novel method, the minimum objective function can be obtained. © Published under licence by IOP Publishing Ltd.

关键词： Pressure drop

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On convergence of covariance matrix of empirical Bayes hyper-parameter estimator

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control Theory and Technology 2024年第2期22卷 149-162页

作者： Yue Ju Biqiang Mu Tianshi Chen School of Data Science and Shenzhen Research Institute of Big Data The Chinese University of Hong KongShenzhenShenzhen518172GuangdongChina Division of Decision and Control Systems School of Electrical Engineering and Computer ScienceKTH Royal Institute of Technology10044StockholmSweden Key Laboratory of Systems and Control Institute of Systems ScienceAcademy of Mathematics and System ScienceChinese Academy of SciencesBeijing100190China

Regularized system identification has become the research frontier of system identification in the past *** related core subject is to study the convergence properties of various hyper-parameter estimators as the sample size goes to *** this paper,we consider one commonly used hyper-parameter estimator,the empirical Bayes(EB).Its convergence in distribution has been studied,and the explicit expression of the covariance matrix of its limiting distribution has been ***,what we are truly interested in are factors contained in the covariance matrix of the EB hyper-parameter estimator,and then,the convergence of its covariance matrix to that of its limiting distribution is *** general,the convergence in distribution of a sequence of random variables does not necessarily guarantee the convergence of its covariance ***,the derivation of such convergence is a necessary complement to our theoretical analysis about factors that influence the convergence properties of the EB hyper-parameter *** this paper,we consider the regularized finite impulse response(FIR)model estimation with deterministic inputs,and show that the covariance matrix of the EB hyper-parameter estimator converges to that of its limiting ***,we run numerical simulations to demonstrate the efficacy of ourtheoretical results.

关键词： Regularized system identification Hyper-parameter estimator Empirical Bayes Convergence of covariance matrix

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Analysis of Public Sentiment in Azerbaijani News and Social Media: Exploring Public Opinion Trends in Social Media and News Articles for Azerbaijani Language

Analysis of Public Sentiment in Azerbaijani News and Social ...

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2024 International Conference on Computing, Machine Learning and Data Science, CMLDS 2024

作者： Guliyev, Nifdi Rustamov, Zaid Rustamov, Samir School of It and Engineering Ada University Azerbaijan School of It and Engineering Ada University Institute of Control Systems Azerbaijan

ISBN: (纸本)9798400716393

This study delves into the analysis of public sentiment within Azerbaijani social media comments and news articles employing Natural Language Processing methodologies and sentiment analysis techniques. The research explores distinct sentiment narratives in social media and news contexts, drawing from a dataset comprising 38,000 comments and 12,000 news articles. In our investigation, we evaluated a spectrum of models, including BERT, GPT-3.5-Turbo, LSTM, SVM, and LR which are complemented with Bag of Words, TF-IDF, and FastText vectorizers, alongside word embedding models. Additionally, we employ various preprocessing techniques, such as eliminating links and mentions (@ or 'at'), transforming emojis into a readable format, and performing stemming and stop word removal on news articles. Our trained models demonstrate superior performance compared to the Large Language Models which suggests the efficacy of our tailored approach in capturing polarity within Azerbaijani social media and news data. The findings underscore the superiority of SVM over other classification models across both social media and news articles. Moreover, it contributes valuable insights into sentiment analysis in diverse linguistic contexts, with implications for understanding public sentiment dynamics in Azerbaijani media. © 2024 ACM.

关键词： Sentiment analysis

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Detection of Oscillations in Process control Loops From Visual Image Space Using Deep Convolutional Networks

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 982-995页

作者： Tao Wang Qiming Chen Xun Lang Lei Xie Peng Li Hongye Su the Department of Electronic Engineering the School of InformationYunnan UniversityKunming 650091China DAMO Academy Alibaba GroupHangzhou 311100China the State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang UniversityHangzhou 310027China

Oscillation detection has been a hot research topic in industries due to the high incidence of oscillation loops and their negative impact on plant *** numerous automatic detection techniques have been proposed,most of them can only address part of the practical *** oscillation is heuristically defined as a visually apparent periodic ***,manual visual inspection is labor-intensive and prone to missed *** neural networks(CNNs),inspired by animal visual systems,have been raised with powerful feature extraction *** this work,an exploration of the typical CNN models for visual oscillation detection is ***,we tested MobileNet-V1,ShuffleNet-V2,Efficient Net-B0,and GhostNet models,and found that such a visual framework is well-suited for oscillation *** feasibility and validity of this framework are verified utilizing extensive numerical and industrial *** with state-of-theart oscillation detectors,the suggested framework is more straightforward and more robust to noise and *** addition,this framework generalizes well and is capable of handling features that are not present in the training data,such as multiple oscillations and outliers.

关键词： Convolutional neural networks(CNNs) deep learning image processing oscillation detection process industries

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On the optimality of uniform velocity-deceleration separation scheme for tethered satellite systems

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control Theory and Technology 2024年第4期22卷 503-516页

作者： Peng Yu Ji-Feng Zhang Shuping Tan Jin Guo Yanlong Zhao School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China Key Laboratory of Knowledge Automation for Industrial Processes Ministry of EducationBeijing100083China Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing100190China Beijing Institute of Control Engineering Beijing100094China

For mitigating the libration angle fluctuation of the tethered satellite system,this paper discusses how to make the uniform velocity-deceleration separation scheme achieve the best ***,a judgment condition is established to determine the tether state by comparing the tether length and the relative distance of the sub-satellite and the parent *** on the tethered satellite system dynamics equation and Clohessy-Wiltshire equation,dynamic models are given for four cases of tether ***,the influence of the uniform velocity-deceleration separation scheme on the libration angle is analyzed by taking the libration angle at the separation ending time and the mean absolute value of the libration angle as index ***,the optimality problem of the uniform velocity-deceleration separation scheme is formulated as an optimization problem with constraints,and an approximate solution algorithm is given by combining the back propagation neural network and Newton-Raphson method of multiple initial ***,the effectiveness of the proposed method is verified by a numerical simulation.

关键词： Tethered satellite systems Libration angle Uniform velocity-deceleration separation Neural network

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Resilient annular finite-time synchronization for master-slave systems under scaling attacks

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IET control Theory and Applications 2023年第18期17卷 2458-2473页

作者： Murugesan, Sathishkumar Ishizaki, Takayuki Liu, Yen-Chen Department of Systems and Control Engineering Tokyo Institute of Technology Tokyo Japan Department of Mechanical Engineering National Cheng Kung University Tainan Taiwan

This paper investigates the resilient annular finite-time synchronization and boundedness problems for master-slave systems under dynamic event-triggered scheme (ETS), actuator faults, and scaling attacks. A comprehensive model for characterizing scaling attacks is presented. The switched dynamic ETS is developed to reduce the bandwidth pressure. Two different internal variables are designed, each of which changes based on the switching manifold. Simultaneously, the resilient problem of switched master-slave systems with respect to stochastic scaling attacks is considered, where there are limited malicious signals introduced by the adversary. Based on the Lyapunov-like function involving the different internal dynamic variables, a set of criteria is established in the form of linear matrix inequalities (LMIs), which guarantee the annular finite-time boundedness. Finally, two examples are presented to verify the theoretical findings. © 2023 The Authors. IET control Theory & Applications published by John Wiley & Sons Ltd on behalf of The Institution of engineering and Technology.

关键词： Linear matrix inequalities

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