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Passivity based sliding mode control and synchronization of a perturbed uncertain unified chaotic system

MATHEMATICS AND COMPUTERS IN SIMULATION 2021年 181卷 150-169页

作者： Takhi, Hocine Kemih, Karim Moysis, Lazaros Volos, Christos Jijel Univ Elect Dept L2EI Lab Jijel Algeria Aristotle Univ Thessaloniki Phys Dept Lab Nonlinear Syst Circuits & Complex Thessaloniki Greece

The problem of passivity-based sliding mode control is considered, for the unified chaotic system having uncertainties and perturbations. Using a combination between sliding mode method and the passivity method, an appropriate switching surface for the uncertain and perturbed system is designed, and then through passivity theory, the stability of the system is ensured. The proposed design is applied in two control problems, the first one being the stabilization of the uncertain perturbed unified chaotic system and the second one is the synchronization between two unified chaotic systems, where only the slave system contains uncertainties and perturbations. Finally, the effectiveness of the proposed methods are illustrated through numerical simulations, and also through a microcontroller implementation. (C) 2020 International Association for Mathematics and Computers in Simulation (IMACS). Published by Elsevier B.V. All rights reserved.

关键词： Synchronization Passivity control Sliding mode control Uncertainties Perturbations Disturbances Unified chaotic system microcontroller implementation

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Hamiltonian energy and coexistence of hidden firing patterns from bidirectional coupling between two different neurons

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COGNITIVE NEURODYNAMICS 2022年第4期16卷 899-916页

作者： Njitacke, Zeric Tabekoueng Koumetio, Bernard Nzoko Ramakrishnan, Balamurali Leutcho, Gervais Dolvis Fozin, Theophile Fonzin Tsafack, Nestor Rajagopal, Kartikeyan Kengne, Jacques Univ Buea Coll Technol COT Dept Elect & Elect Engn POB 63 Buea Cameroon Univ Dschang Elect Engn Dept IUT FV Res Unit Automat & Appl Comp URAIA POB 134 Bandjoun Cameroon Lodz Univ Technol Dept Automat Biomech & Mechatron Lodz Poland Univ Dschang Fac Sci Elect & Signal Proc UR MACETS Dept Phys Res Unit Condensed Matter POB 67 Dschang Cameroon Chennai Inst Technol Ctr Nonlinear Syst Chennai Tamil Nadu India Ecole Technol Super ETS Dept Elect Engn Montreal PQ H3C 1K3 Canada Univ Buea Fac Engn & Technol FET Dept Elect & Elect Engn POB 63 Buea Cameroon

In this paper, bidirectional-coupled neurons through an asymmetric electrical synapse are investigated. These coupled neurons involve 2D Hindmarsh-Rose (HR) and 2D FitzHugh-Nagumo (FN) neurons. The equilibria of the coupled neurons model are investigated, and their stabilities have revealed that, for some values of the electrical synaptic weight, the model under consideration can display either self-excited or hidden firing patterns. In addition, the hidden coexistence of chaotic bursting with periodic spiking, chaotic spiking with period spiking, chaotic bursting with a resting pattern, and the coexistence of chaotic spiking with a resting pattern are also found for some sets of electrical synaptic coupling. For all the investigated phenomena, the Hamiltonian energy of the model is computed. It enables the estimation of the amount of energy released during the transition between the various electrical activities. Pspice simulations are carried out based on the analog circuit of the coupled neurons to support our numerical results. Finally, an STM32F407ZE microcontroller development board is exploited for the digital implementation of the proposed coupled neurons model.

关键词： Hindmarsh-Rose neuron FitzHugh-Nagumo neuron Asymmetric electrical synapse Hamilton energy Coexistence of hidden firing patterns Pspice microcontroller implementation

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Autonomous Jerk Oscillator with Quadratic Nonlinearities: Theoretical Investigations, Chaos Control, and Difference Synchronization

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IRANIAN JOURNAL OF SCIENCE 2023年第4期47卷 1313-1324页

作者： Sriram, Balakrishnan Tamba, Victor Kamdoum Dongmo, Eric Donald Chamgoue, Andre Cheage Rajagopal, Karthikeyan Chennai Inst Technol Ctr Nonlinear Syst Chennai 600069 Tamilnadu India Univ Dschang Dept Telecommun & Network Engn IUT Fotso Victor Bandjoun POB 134 Bandjoun Cameroon Univ Buea Coll Technol Dept Mech Engn POB 63 Buea Cameroon Univ Ngaoundere Sch Geol & Min Engn POB 115 Meiganga Cameroon Chandigarh Univ Univ Ctr Res & Dev Dept Elect & Commun Engn Mohali 140413 Punjab India

This paper reports concerning the microcontroller validation of a self-governing jerk oscillator with quadratic nonlinearities (AJOQN) and operation investigations based on chaos control and difference synchronization. AJOQN displays self-excited chaotic attractors with different shapes. The total amplitude control of AJOQN is achieved by tuning one of its parameters. The dynamical characteristics reported in AJOQN are vindicated via the microcontrollerprobing. A single controller is delineated to quash the complex characteristics of AJOQN. The validity of the designed single controller is confirmed by the numerical simulations. In the bargain, controllers are formulated to establish difference synchronization in the triple similar coupled chaotic AJOQNs advancing from different incipient states. In closing, simulations numerically of the triple alike coupled chaotic AJOQNs manifest the efficacy of difference synchronization.

关键词： Autonomous jerk system Self-excited chaotic attractors Total amplitude control microcontroller implementation Controls of chaotic attractors Difference synchronization

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Dynamics, Controls of the Nonsmooth-Air-Gap Brushless Direct Current Motor Under the Influence of Temperature and Embedded in a microcontroller

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JOURNAL OF CONTROL AUTOMATION AND ELECTRICAL SYSTEMS 2024年第6期35卷 1121-1134页

作者： Venkatesh, Jayaraman Nkengne, Steve Tchassem Kingni, Sifeu Takougang Fotsin, Hilaire Bertrand Sekhar, D. Chandra Rajagopal, Karthikeyan Chennai Inst Technol Ctr Artificial Intelligence Chennai 600069 Tamilnadu India Univ Dschang Fac Sci Dept Phys Res Unit Condensed Matter Elect & Signal Proc UR M POB 67 Dschang Cameroon Univ Maroua Natl Adv Sch Mines & Petr Ind Dept Mech Petr & Gas Engn POB 46 Maroua Cameroon Vemu Inst Technol Dept Elect & Elect Engn Chithoor India SRM Inst Sci & Techonol Ramapuram Ctr Res Chennai 600089 India SRM Easwari Engn Coll Ctr Res Chennai 600089 India

This paper investigates the dynamical behaviors, experimental validation using a microcontroller technique, and control strategies for complex and coexisting behaviors in a nonsmooth-air-gap brushless direct current motor under the influence of temperature (NAGBDCMT). Steady-state analysis reveals three steady states with unstable branches in the three considered planes. The NAGBDCMT exhibits diverse dynamical structures, including bistable regular and chaotic domains, monostable attractors, periodic and continuous spiking, coexisting chaotic and regular spiking behaviors, various complex characteristics, and coexistence between continuous spiking oscillations and chaotic characteristics. These dynamical structures are corroborated by an ATMEGA2560 microcontroller realization scheme. Control of the complex characteristics and coexisting attractors in the NAGBDCMT is achieved using two configured single controllers and a linear augmentation control scheme, respectively.

关键词： Controls of chaos and coexisting attractors Chaotic attractors Coexisting attractors Brushless direct current motor microcontroller implementation Linear augmentation control technique

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Initial states-induced complex behaviors in a memristive coupled Hopfield neural network model and its application in biomedical image encryption

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PHYSICA SCRIPTA 2024年第1期99卷 015215-015215页

作者： Biamou, Arsene Loic Mbanda Tamba, Victor Kamdoum Kuate, Guy Chance Gildas Tagne, Francois Kapche Takougang, Armand Cyrille Nzeukou Fotsin, Hilaire Bertrand Univ Dschang Dept Elect Engn Res Unit Automat & Appl Comp IUT Fotso Victor Bandjoun POB 134 Bandjoun Cameroon Univ Dschang Fac Sci Dept Phys Res Unit Condensed Matter Elect & Signal Proc POB 67 Dschang Cameroon Univ Dschang Dept Telecommun & Network Engn IUT Fotso Victor Bandjoun POB 134 Bandjoun Cameroon

The multi-stable memristor is a type of memristor that can store multiple conductance states, optimizing information management and improving the efficiency of artificial neural networks such as Hopfield networks. It can improve the performance of Hopfield neural networks by minimizing the synaptic weight between neurons and increasing information storage capacity through its ability to store multiple levels of conductance. This paper presents and discusses a novel Hopfield neural network model composed of two non-identical sub-neural networks coupled by a flux-controlled multi-stable memristor (MCHNN) and its application in biomedical image encryption. Using analysis methods such as bifurcation diagrams, phase portraits, maximum Lyapunov exponent, and basins of attraction, we analyze the dynamics of the MCHNN model associated with coupling strength and initial states. Numerical results show that the proposed MCHNN model is capable of developing rich and complex dynamics, including chaos, double-bubble bifurcations, homogeneous and non-homogeneous coexisting attractors at different positions induced by initial states. To support the numerical results, the MCHNN model is implemented on a ATmega 2560 microcontroller. The results are in very good agreement with those obtained thoeretically and numerically. We exploit the interesting properties of the proposed MCHNN model to generate random bits for biomedical image encryption. We evaluate the robustness and efficiency of the designed image encryption algorithm by carrying out statistical tests and security analyses.

关键词： MCHNN model initial-boosted behavior double bubble bifurcations microcontroller implementation RGN biomedical image encryption

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Steady and transient characteristics of a single stage PV water pumping system

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ENERGY SYSTEMS-OPTIMIZATION MODELING SIMULATION AND ECONOMIC ASPECTS 2015年第2期6卷 173-199页

作者： Packiam, Periasamy Jain, N. K. Singh, I. P. Indian Inst Technol Delhi Instrument Design Dev Ctr New Delhi 110016 India

A single stage water pumping system comprises of a photovoltaic (PV) array, a controlled voltage source inverter, and an induction motor coupled with a water pump. It is highly efficient, low cost and easily controllable for water pumping application. The system characteristics are a predominant requirement for improving the performance. In this paper, the system behavior with six step mode, sinusoidal pulse width modulation (PWM) and space vector PWM (SVPWM) technique are studied. The system responses for different modulation indices are also reported. The characteristics for linear, centrifugal and optimized centrifugal pump load are determined. The experimental validation has been performed by implementing SVPWM employed with perturb and observe peak power tracking algorithm using dsPIC 6010A on a laboratory prototype. Thus, the system behavior proves to be high efficient, low cost and with simple control. Also, the selection of SVPWM with optimized v/f slope improves the performance of the system.

关键词： Characterization DC/AC water pump Induction motor microcontroller implementation Single stage photovoltaic

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implementation of a Modular Architecture for Distributed Autonomous Control of Mobile Robots

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IFAC Proceedings Volumes 2000年第26期33卷 567-572页

作者： Gen’ichi Yasuda Department of Mechanical Engineering Faculty of Engineering Nagasaki Institute of Applied Science 536 Aba-machi Nagasaki 851-0193 Japan

This paper describes the design and implementation of a modular architecture for distributed control of robot systems. The architecture is composed of autonomous modules; each module is equipped with a high-performance microcontroller, and has its own control functions with sensors, actuators, and communication interfaces as an intelligent autonomous sensing and actuating device. Operations of these autonomous modules are integrated through a communication network of serial bus type. For a mobile robot with two coaxial independently driving wheels, position and velocity control algorithms to follow a planned path cooperatively are implemented, and the performance of the proposed architecture is experimentally evaluated.

关键词： Modular control architecture microcontroller implementation distributed processing mobile robots

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Control of A Grid Connected Converter During Weak Grid Conditions 7

Control of A Grid Connected Converter During Weak Grid Condi...

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7th IEEE International Symposium On Power Electronics for Distributed Generation Systems (PEDG)

作者： Lorenzen, Soren Lund Nielsen, Alex Buus Bede, Lorand Aalborg Univ Dept Energy Technol Aalborg Denmark

ISBN: (纸本)9781467386173

The focus on renewable energy sources have been increasing since the late 80s in Denmark. Especially focus on wind power has been increasing, with implementation of big on- and offshore wind farms. However, when installing the wind farms, these are often placed distant from the utility grid, like the case for offshore wind turbines. This can cause the wind farm grid networks to be weak. A weak network is an extra challenge to inject energy into, since it might exceed grid codes and grid standard values, if not compensated for. To ensure quality of the energy injected to the network, a Voltage Source Converter (VSC) is used. Using these VSCs the quality of the injected energy can be according to the standards requirements. This paper shows the effects of different weak grid conditions on the control system of the inverter, which includes lowered bandwidth and higher response time. Furthermore the controller has been designed to be stable for different Short Circuit Ratio (SCR) values. The designed controller and filter has shown to be operating under various weak grid conditions by simulations and for a 5kW laboratory setup.

关键词： Grid Connected Converter Weak Grid Applications SVPWM Three Phase Two Level Inverter Control microcontroller implementation

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A resource-constrained sensor dynamic compensation using a learning-from-examples approach

A resource-constrained sensor dynamic compensation using a l...

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24th IEEE Instrumentation and Measurement Technology Conference

作者： Marconato, A. Hu, M. Marzadro, C. Boni, A. Petri, D. Univ Trent Dept Informat & Commun Technol I-38050 Trento Italy

In this paper we present a novel technique based on a learning from-examples approach for dynamic compensation of sensors. The context of application is the area of Wireless Sensor Networks, where simple but at the sa... 详细信息

ISBN: (纸本)9781424405886

关键词： sensor compensation support vector machines for regression reduced-set methods microcontroller implementation

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Ball-Scorer: Design and Fabrication of an Autonomous Ball Scoring Robot

Ball-Scorer: Design and Fabrication of an Autonomous Ball Sc...

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2nd International Conference on Computer and Automation Engineering (ICCAE)

作者： Amar, Muhammad Asad, Muhammad Usman Farooq, Umar Raza, Asif Iqbal, Asim Tahir, Osama Univ Punjab Dept Elect Engn Lahore 54590 Pakistan

ISBN: (纸本)9781424455690

Ball-Scorer is a differentially driven autonomous robot that was fabricated to compete in National Engineering Robotics Contest (NERC) 2008. This paper discusses the development of each component of the robot that is designed to pick up the balls from ball stand by navigating through a grid of white lines and potting these balls into goal posts of different heights. The sensory system of robot comprises of infrared sensors, potentiometers and bump switches. Three controllers namely proportional integral, proportional and proportional integral derivative are designed using root locus technique for navigation, ball picking and ball launching systems respectively. These controllers are then implemented using a single chip low cost AT89C52 microcontroller. Results are presented to show the validity and performance of the entire system. The robot can also be utilized in class room for teaching electromechanical and control systems principles.

关键词： ball scoring robot P, PI, PID controllers root locus technique line tracking ball picking ball launching microcontroller implementation

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