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17th International Workshop on Impedance Spectroscopy, IWIS 2024

作者： Ouni, Cherif Ammar, Nour Kallel, Ahmed Yahia Horstmann, John Derbel, Nabil Fakhfakh, Ahmed Kanoun, Olfa Digital Research Centre of Sfax National School of Electronics and Telecommunications of Sfax Laboratory of Signals Systems Artificial Intelligence and Networks Sfax Tunisia Measurement and Sensor Technology Faculty of Electrical Engineering and Information Technology Chemnitz University of Technology Chemnitz09126 Germany National Engineering School of Sfax University of Sfax Control and Energy Management Laboratory Sfax3038 Tunisia Chemnitz University of Technology Chemnitz09126 Germany Electronic Devices of Micro and Nano Technique Faculty of Electrical Engineering and Information Technology Chemnitz University of Technology Chemnitz09126 Germany

ISBN: (纸本)9798331507626

Wearable bioimpedance spectroscopy (BIS) devices are becoming increasingly popular due to their portability and low power consumption. However, improving power efficiency remains a significant challenge. One proposed solution is to reduce the number of excitation frequencies in the stimulation signal. This study investigates how reducing the number of used frequencies affects bioimpedance spectroscopy performance through simulations using synthetic data derived from a Cole-Cole model incorporating a Constant Phase Element (CPE). Simulations were conducted at various noise levels to evaluate how noise impacts the relationship between frequency and impedance. The results indicate a correlation between the number of frequencies used in BIS and the accuracy of CPE parameter extraction. This is particularly evident for α parameters of 0.8 and higher. Conversely, lowering the α value increases errors, even when a higher number of frequencies is used. © 2024 IEEE.

关键词： Image coding

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A Finite-Time Posture control Strategy for the Swarm Underactuated Robots 5th

A Finite-Time Posture Control Strategy for the Swarm Under...

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5th Chinese Conference on Swarm Intelligence and Cooperative control, CCSICC 2021

作者： Huang, Zixin Qin, Xiangyu Wei, Shaoqi Wang, Lejun Hubei Key Laboratory of Intelligent Robot Wuhan Institute of Technology Wuhan430205 China Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Wuhan430200 China School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan430205 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan430074 China

ISBN: (纸本)9789811939976

Under the background of industrial machinery automation. The swarm robots are required to cooperate to complete complex and accurate works in finite-time and create more relative residual value. Based on the inherent advantages of underactuated robot, the research of finite time posture control strategy has higher theoretical and practical value. Firstly, the dynamic model of a single Pendubot of planar swarm underactuated robots was built. However, the robots reach to the same objective from different initial states and keep being at the same posture, so it was necessary to plan a feasible trajectory. Then, the planned trajectory parameters are optimized to make the underactuated robots relized the objectives in finite time. Finally, an unified tracking controller is designed for the underactuated robots. Simulation results of the swarm underactuated robots demonstrated the effectiveness of the proposed control strategy. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Robots

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Circular Target Attack-Defense Stackelberg Game for Multi-Agents systems

Circular Target Attack-Defense Stackelberg Game for Multi-Ag...

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第35届中国过程控制会议

作者： Ning Xing Hai-Tao Zhang Yaozhong Zheng School of Artificial Intelligence and Automation Engineering Research Center of Autonomous Intelligent Unmanned Systems Key Laboratory of Image Processing and Intelligent Control State Key Laboratory of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and Technology

In this paper, the problem of guarding a circular area is proposed and solved using a Stackelberg differential game theoretic approach. The objective of the attacker is to breach the perimeter of the defended area, while the defenders endeavor to thwart such attempts. The dynamics of the attack-defense game are modeled according to the distance and position relations among defenders, attackers, and the center of defense area. The optimal Stackelberg equilibrium control strategies for both defenders and attackers are designed to guarantee the defense mission's success. Then, the effectiveness of the proposed method is validated through numerical simulation.

关键词： Multi-agents system Stackelberg differential game graphical game

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Converter-Fed Induction Motor Efficiency Measurements - IEC 60034-2-3

Converter-Fed Induction Motor Efficiency Measurements - IEC ...

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International Conference on Electrical Machines, ICEM

作者： Matias Tiihonen Hannu Kärkkäinen Lassi Aarniovuori Markku Niemelä Dong Liu Jan Barta Laboratory of Electrical Drives Technology LUT University Lappeenranta Finland Laboratory of Electrical Drives Technology LUT University Lahti Finland Laboratory of control engineering and digital systems LUT University Lappeenranta Finland Department of Power Electrical and Electronic Engineering Brno University of Technology Brno Czech republic

ISBN: (数字)9798350370607

ISBN: (纸本)9798350370614

Induction motors consume huge amount of energy, so their energy efficiency is an important topic. The efficiency determination methods of direct-on-line motors are mature and during the last decade efforts have been made to create a standardized way to also determine efficiency of converter-fed motors. Here the efficiency determination methods given in IEC 60034-2-3 are utilized using a modern induction motor with the rated power of 7.5 kW and compared with the sinusoidal supply results. In addition, the high frequency harmonic power is extracted from the measured active power and its behavior as a function of the frequency and torque is illustrated.

关键词： Induction motors Torque Power measurement Power system harmonics Harmonic analysis Loss measurement Torque measurement High frequency IEC Standards Standards

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Stable control and Disturbance Rejection Strategy for Planar 2R Underactuated Robot via Intelligent Algorithm 48

Stable Control and Disturbance Rejection Strategy for Planar...

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48th Annual Conference of the IEEE Industrial Electronics Society, IECON 2022

作者： Huang, Zixin Wan, Xiao Zhou, Yaosheng Wang, Lejun Wang, Liheng School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan Institute of Technology School of Electrical and Information Engineering Wuhan China Wuhan Institute of Technology School of Innovation and Entrepreneurship Wuhan China Chongqing University of Posts and Telecommunications Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing China

ISBN: (数字)9781665480253

ISBN: (纸本)9781665480253

Stable control and active disturbance rejection strategy is proposed for planar 2R underactuated robot via intelligent algorithm in this paper. At first, we build the dynamic model and describe the control characteristic. After that, we design PD controller for the active link. According to the underactuated constraint, we then optimize the parameters of controller by using the differential evolution algorithm (DEA), so that we can ensure the target states of all links could eventually be reached at the identical time. And the simulation results indicate the strategy is effective. © 2022 IEEE.

关键词： Disturbance rejection

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Oscillation Trajectory Optimization and control Method for Two-link Underactuated Manipulators

Oscillation Trajectory Optimization and Control Method for T...

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第42届中国控制会议

作者： Lejun Wang Huiming Wang Xianlun Tang Zixin Huang Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University School of Electrical and Information Engineering Wuhan Institute of Technology

This paper provides an oscillation trajectory optimization and control method for two-link underactuated manipulators(UMs) in a vertical *** proposed method solves the problem that the UMs cannot always enter the balance region in the partitioning ***,we establish the system dynamic model,and analyze the system couple ***,we program an oscillation trajectory for the active link,and use the intelligent method to obtain the trajectory parameters,so ensuring the system can reach the area adjacent to the target position through tracking ***,we design the controller to realize the stable control at the target ***,the simulation results show the effectiveness and generality of the control strategy.

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Distributed Prescribed-Time Observer for Nonlinear systems

arXiv

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arXiv 2025年

作者： de Heij, Vincent Niazi, M.B. Umar Johansson, Karl H. Ahmed, Saeed Faculty of Science and Engineering University of Groningen Groningen9747 AG Netherlands Division of Decision and Control Systems Digital Futures KTH Royal Institute of Technology StockholmSE-100 44 Sweden Laboratory for Information and Decision Systems Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States

This paper proposes a distributed prescribed-time observer for nonlinear systems representable in a block-triangular observable canonical form. Using a weighted average of neighbor estimates exchanged over a strongly connected digraph, each observer estimates the system state despite limited local sensor measurements. The proposed design guarantees that distributed state estimation errors converge to zero at a user-specified convergence time, irrespective of observers’ initial conditions. To achieve this prescribed-time convergence, distributed observers implement time-varying local output injection gains that asymptotically approach infinity as the prescribed time is approached. The theoretical convergence is rigorously proven and validated through numerical simulations. Copyright © 2025, The Authors. All rights reserved.

关键词： Nonlinear simulations

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controllability Analysis and Stable control for Planar Non-One Passive Joint Underactuated Robot with Bi-Directional Approach

Controllability Analysis and Stable Control for Planar Non-O...

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Chinese control Conference (CCC)

作者： Zixin Huang Ziang Wei Wei Wang Xiangyu Gong Ba Zeng Lejun Wang School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications

In this paper, we consider the controllability and stability control problem for planar underactuated robots with non-one passive joints. The dynamic constraints of the robot are mainly caused by nonholonomic constraints. Firstly, we establish the dynamic model of this system and analyze its controllability. Then, based on location and number of passive joints, we divide the system into different configurations. Next, we propose a stable control method based on bi-directional approach to achieve the stable control of different systems. At last, the numerical simulation conclusion illuminate the feasibility of this method.

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Trajectory tracking control strategy based on intelligent optimization for space underactuated manipulator

Trajectory tracking control strategy based on intelligent op...

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Industrial Cyber-Physical systems (ICPS)

作者： Houneng Wang Yong Hua Zixin Huang Ziang Wei Chengsong Yu Lejun Wang School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile University Chongqing Key Laboratory of Complex Systems and Bionic Control Chongqing University of Posts and Telecommunications

For the space underactuated manipulator(SUM), this paper researches a intelligent optimization algorithm to plan the trajectory and design the tracking controller. The SUM system is composed of two planar underactuated sub-systems, which can realize horizontal and vertical movements respectively. The control target is to move the end point to the specified position, which means that all joints of the two sub-systems are controlled to the target state. For this control target, we design the feasible trajectory for the active links of the SUM by using particle swarm optimization(PSO) to achieve all joints reaching the specified target state simultaneously. Finally, we design the sliding mode variable structure controller for the active joints to track the planning trajectory. Based on the above control strategy, the control objective of the SUM is realized. The numerical simulation results demonstrate the effectiveness of the proposed control strategy.

关键词： Target tracking Trajectory tracking Trajectory planning Aerospace electronics Numerical simulation Manipulators Trajectory

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controllability analysis and stable control for planar non-one passive joint underactuated robot with bi-directional approach

Controllability analysis and stable control for planar non-o...

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第42届中国控制会议

In this paper, we consider the controllability and stability control problem for planar underactuated robots with nonone passive joints. The dynamic constraints of the robot are mainly caused by nonholonomic constraints. Firstly, we establish the dynamic model of this system and analyze its controllability. Then, based on location and number of passive joints, we divide the system into different configurations. Next, we propose a stable control method based on bi-directional approach to achieve the stable control of different systems. At last, the numerical simulation conclusion illuminate the feasibility of this method.

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