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2023 International Conference Automatics and Informatics, ICAI 2023

作者： Ivanov, Stefan Nedev, Nedyu Nenova, Zvezditza Technical University of Gabrovo Department of Automation Information and Control Systems Gabrovo Bulgaria Technical University of Gabrovo Department of Fundamentals of Electrical and Power Engineering Gabrovo Bulgaria

ISBN: (纸本)9798350312911

In the present work is investigated the impact of ambient temperature in the range of 20°C to 50°C under a change in relative humidity RH of 20% up to 92 % on the characteristics of a highly sensitive TiO2-SiO2-based thin-film impedance humidity sensor element doped with Ce and prepared by a sol-gel method. The variation of sensor impedance changes in a very wide range - about 4 orders of magnitude. The sensor element is connected in a measurement circuit based on an AC bridge, a variable gain amplifier, a precision rectifier, and a microcontroller with a built-in analog-to-digital converter. The use of artificial neural networks monitoring the ambient temperature and measured voltage is proposed for the realization of the temperature compensation of the characteristics. The proposed approach allows compensating the impact of temperature and performing measurements when connecting humidity sensing elements with a very wide range of impedance change. © 2023 IEEE.

关键词： Silica

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Breaking Limitation of Convergence in Continuous Optimization: Predefined-Time Gradient Flows 63

Breaking Limitation of Convergence in Continuous Optimizatio...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Zhang, Renyongkang Guo, Ge Gao, Zhenyu Yu, Miao Zhang, Lu Wang, Zhengsong Han, Meng Yin, Yanyan Northeastern University College of Information Science and Engineering Shenyang110819 China Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Northeastern University at Qinhuangdao School of Control Engineering Qinhuangdao066004 China Curtin University School of Electrical Engineering Computing and Mathematical Sciences PerthWA6102 Australia

ISBN: (纸本)9798350316339

This paper investigates the continuous-time unconstrained optimization via dynamical gradient flow systems. For strongly convex objective functions, a gradient flow with predefined time convergence is proposed, which is suitable for relaxing the objective function to only satisfy the PolyakLojasiewicz (P-L) condition. A predefined-time convergent Newton's flow is designed for the minimization of strictly convex functions. The proposed result is extended for strongly convex objective functions with time-varying parameters. In our schemes, the upper bound of convergence time can be used as a prior choice without involving system initialization and complex parameter calculations. The convergence of algorithms is rigorously proved by using the Lyapunov method. Numerical simulation illustrates the effectiveness of the proposed methods. © 2024 IEEE.

关键词： Lyapunov methods

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A Direct Vector control Strategy for Single-phase Differential Buck Inverter

A Direct Vector Control Strategy for Single-phase Differenti...

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2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Gao, Yanli Lin, Junhui Liu, Peng Zhang, Yonggao Xu, Shuang Chang, Liuchen East China Jiaotong University School of Electrical and Automation Engineering Nanchang China North China University of Technology Department of Electrical and Control Engineering Beijing China University of New Brunswick Fredericton Emera and Nb Power Research Centre for Smart Grid Technologies Fredericton Canada

ISBN: (纸本)9798350376067

This paper proposes an innovative vector control method for single-phase differential Buck inverters, advancing beyond the limitations of traditional control strategies. Unlike previous methods that require a T/4 delay for additional control freedom, the proposed vector control exploits the dual symmetrical DC-DC converter topology, inherently providing the necessary two degrees of freedom. This eliminates the need for virtual phase vector construction, which traditionally occupies significant processor register space and introduces delay. Despite initial vector control not meeting expectations, the adoption of a symmetrical component method to extract positive and negative sequences has refined the control design. Simulation and experimental results confirm the validity of proposed method's, offering improved steady-state performance and maintaining rapid dynamic responses, suitable for applications demanding high power quality. © 2024 IEEE.

关键词： Vectors

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Practically Predefined-Time Adaptive Fuzzy Tracking control for Nonlinear Stochastic Systems

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IEEE Transactions on Cybernetics 2023年第12期53卷 8000-8012页

作者： Zhang, Tianliang Su, Shun-Feng Wei, Wei Yeh, Ruey-Huei Qingdao University of Technology School of Information and Control Engineering Shandong Qingdao266520 China Nanjing University of Science and Technology School of Automation Jiangsu Nanjing210094 China National Taiwan University of Science and Technology Department of Electrical Engineering Taipei106 Taiwan Shandong University of Science and Technology College of Electrical Engineering and Automation Qingdao266590 China National Taiwan University of Science and Technology Department of Industrial Management Taipei106 Taiwan

This article addresses the practically predefined-time adaptive fuzzy tracking control problem of strict-feedback nonlinear stochastic systems, where the system under consideration includes stochastic disturbances and uncertain parameters. First, in this study, practically predefined-time stochastic stabilization (PPSS) in the $p$ th moment sense is introduced, and a Lyapunov-type criterion for PPSS is proposed to assure the stabilization of the system considered. With these ideas, based on the backstepping design method, a semiglobally practically predefined-time adaptive fuzzy tracking control algorithm is proposed with a fuzzy system used to approximate the unknown part of the system. Moreover, the settling time of the system response can be arbitrarily adjusted in a mean-value sense, and such freedom can be used to improve the stochastic finite-/fixed-time control results. Finally, a practical example and a numerical example of a comparison are provided to validate the effectiveness of the proposed control strategy. © 2013 IEEE.

关键词： Stochastic systems

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Finite-time robust performance improvement for non-linear systems in the presence of input non-linearity and external disturbance

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IET control Theory and Applications 2023年第6期17卷 672-682页

作者： Wang, Haoping Ghaffari, Valiollah Mobayen, Saleh Bartoszewicz, Andrzej Fekih, Afef Assawinchaichote, Wudhichai School of Automation Nanjing University of Science and Technology Nanjing China Department of Electrical Engineering Persian Gulf University Bushehr Iran Graduate School of Intelligent Data Science National Yunlin University of Science and Technology Yunlin Douliou Taiwan Institute of Automatic Control Lodz University of Technology Lodz Poland Department of Electrical and Computer Engineering University of Louisiana at Lafayette LafayetteLA United States Department of Electronic and Telecommunication Engineering Faculty of Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand

The main focus of this research is on improving the performance of dynamic systems with actuator non-linearities and time-varying disturbances. To this end, using the concept of finite-time stability, a novel observer is presented to estimate the disturbances in systems with input non-linearities. Then, introducing an innovative sliding manifold, a robust observer-based technique is derived to guarantee the finite-time stability of the sliding surface. Hence, the closed-loop system would be stable in the presence of hard non-linearities and time-varying disturbances. The performance of the proposed approach was assessed in using a simulation study of two numerical examples. The obtained results and comparison with a conventional method confirmed the benefits of the suggested approach. © 2022 The Authors. IET control Theory & Applications published by John Wiley & Sons Ltd on behalf of The Institution of engineering and Technology.

关键词： Closed loop systems

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Queue estimation for isolated signalized intersections in intelligent vehicle-infrastructure cooperation systems

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Science China(Information Sciences) 2021年第4期64卷 226-228页

作者： Yunpeng WANG Ge GUO Wei YUE School of Control Science and Engineering Dalian University of Technology State Key Laboratory of Synthetical Automation for Process Industries Northeastern University School of Control Engineering Northeastern University at Qinhuangdao School of Marine Electrical Engineering Dalian Maritime University

Dear editor,Traffic jams have become an important issue in urban networks, particularly for arterial roads [1]. The need for more efficient traffic control techniques has become critical. One good solution is the so-called intelligent vehicleinfrastructure cooperation systems (i-VICS), which assumes autonomous vehicles in the traffic flow (i.e., a mixed traffic flow). The aim of i-VICS is to achieve cooperative vehicle intersection control, i.e., to enable cooperation between vehicles and traffic signals, for safe and efficient intersection operations.

关键词： Intelligent Vehicle-Infrastructure Cooperation Systems (i-VICS) traffic information prediction real time queue length queue length estimation traffic flow model

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Cooperative Output Regulation of Multi-Agent Systems under Distributed Denial of Service Attacks 42

Cooperative Output Regulation of Multi-Agent Systems under D...

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42nd Chinese control Conference, CCC 2023

作者： Gao, Weinan Jiang, Zhong-Ping Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Tandon School of Engineering Department of Electrical and Computer Engineering New York University BrooklynNY11201 United States

ISBN: (纸本)9789887581543

This paper aims to tackle the cooperative output regulation problem of multi-agent systems with the existence of distributed denial of service attacks. The proposed solution consists of two steps. First, develop a distributed control policy with internal models, and then analyze the resilience of closed-loop systems. Through the notion of input-to-state stability and Lyapunov stability theory, a bound of distributed denial of service duration is obtained under which the closed-loop systems achieve cooperative output regulation. The efficiency is validated by numeric simulations. © 2023 Technical Committee on control Theory, Chinese Association of automation.

关键词： Multi agent systems

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Detection of Perfect Stealthy Attacks on Cyber-Physical Systems Subject to Measurement Quantizations: A Watermark-Based Strategy

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 114-125页

作者： Yu-Ang Wang Zidong Wang Lei Zou Bo Shen Hongli Dong the College of Information Science and Technology Donghua University the Engineering Research Center of Digitalized Textile and Fashion Technology Ministry of Education IEEE the College of Electrical Engineering and Automation Shandong University of Science and Technology the Department of Computer Science Brunel University London Uxbridge the Sanya Offshore Oil and Gas Research Institute Northeast Petroleum University the Artificial Intelligence Energy Research Institute Northeast Petroleum University Heilongjiang Provincial Key Laboratory of Networking and Intelligent Control Northeast Petroleum University

In this paper, the attack detection problem is investigated for a class of closed-loop systems subjected to unknownbutbounded noises in the presence of stealthy attacks. The measurement outputs from the sensors are quantized before transmission.A specific type of perfect stealthy attack, which meets certain rather stringent conditions, is taken into account. Such attacks could be injected by adversaries into both the sensor-toestimator and controller-to-actuator channels, with the aim of disrupting the normal data flow. For the purpose of defending against these perfect stealthy attacks, a novel scheme based on watermarks is developed. This scheme includes the injection of watermarks(applied to data prior to quantization) and the recovery of data(implemented before the data reaches the estimator).The watermark-based scheme is designed to be both timevarying and hidden from adversaries through incorporating a time-varying and bounded watermark signal. Subsequently, a watermark-based attack detection strategy is proposed which thoroughly considers the characteristics of perfect stealthy attacks,thereby ensuring that an alarm is activated upon the occurrence of such attacks. An example is provided to demonstrate the efficacy of the proposed mechanism for detecting attacks.

关键词： Attack detection cyber-physical systems (CPSs) perfect stealthy attacks watermark-based strategy

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A Norm Optimal Iterative Learning control Approach with Efficient Computation 13

A Norm Optimal Iterative Learning Control Approach with Effi...

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13th IEEE Data Driven control and Learning Systems Conference, DDCLS 2024

作者： Gao, Luyuan Zhuang, Zhihe Tao, Hongfeng Chen, Yiyang Paszke, Wojciech Jiangnan University Key Laboratory of Advanced Process Control for Light Industry of Ministry of Education Wuxi214122 China School of Mechanical and Electrical Engineering Soochow University Suzhou215137 China Institute of Automation University of Zielona Gora Zielona Gora Poland

ISBN: (纸本)9798350361674

Iterative learning control (ILC) is excellently applied to output tracking for systems that perform repetitive tasks. Classical norm optimal ILC (NOILC) approach yields optimal control inputs by minimizing a quadratic cost function. However, this approach requires the introduction of supervectors, i.e., lifting technique, for system description, which raises a high computational load problem. The contribution of this paper is to propose a non-lifted NOILC (N-NOILC) approach by redesigning a cost function that does not involve the lifting technique, achieving the goal of efficient computation. Therefore, the proposed approach is particularly suitable for large tracking tasks with long trial duration and high sampling frequency. Moreover, considering the model uncertainty in practice, robust convergence is analyzed. Numerical simulations are shown to demonstrate the properties and advantages of the proposed approach. © 2024 IEEE.

关键词： Adversarial machine learning

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A novel strategy to solve communication constraints for formation control of multi-AUVs

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Science China(Information Sciences) 2021年第7期64卷 253-255页

作者： Zhenyu GAO Ge GUO Department of Automation Dalian Maritime University School of Control Engineering Northeastern University Qinhuangdao Key Laboratory of Synthetical Automation for Process Industries Northeastern University

Dear editor,Interest in terms of research on formation control of multiple autonomous underwater vehicles (multi-AUVs) has gained considerable attention in recent years [1–5], owing to its extensive applications in d... 详细信息

关键词： event-triggered fixed-time stable velocity observer formation control autonomous underwater vehicles

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