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Analysis, microcontroller implementation and chaos control of non-smooth air-gap permanent magnet synchronous motor

PRAMANA-JOURNAL OF PHYSICS 2024年第4期98卷 126-126页

作者： Yamdjeu, Giles Sriram, Balakrishnan Kingni, Sifeu Takougang Rajagopal, Karthikeyan Mohamadou, Alidou Univ Maroua Fac Sci Dept Phys POB 814 Maroua Cameroon Chennai Inst Technol Ctr Computat Modelling Chennai 600069 India Univ Maroua Natl Adv Sch Mines & Petr Ind Dept Mech Petr & Gas Engn POB 46 Maroua Cameroon Chennai Inst Technol Ctr Nonlinear Syst Chennai India

This article presents an analysis and control approach for a non-smooth air-gap permanent magnet synchronous motor (NSAG-PMSM) in the absence of external disturbances. The analytical study of NSAG-PMSM shows the existence of equilibrium points. Based on the Routh-Hurwitz criterion, the stability of the equilibrium points reveals the existence of transcritical bifurcation. NSAG-PMSM exhibits various dynamical behaviours, such as bistable chaos, periodic spiking oscillations, chaotic spiking characteristics, coexistence between periodic and chaotic behaviours and periodic evolution towards monostable chaos as system parameters change. The research uses microcontroller implementation to validate the dynamical characteristics observed during the numerical simulations of the NSAG-PMSM. The study of NSAG-PMSM proposes a strategy to mitigate chaos and stabilise the system using two simple controllers, with a comparative study presented using peak overshoot and settling time diagrams. By combining these different aspects, this article significantly contributes to the understanding of the operation in NSAG-PMSM, highlighting specific aspects related to the application of microcontroller techniques in the field of electrical engineering and solutions to chaos control.

关键词： Non-smooth-air-gap permanent magnet synchronous motor transcritical bifurcation coexistence attractors monostable and bistable chaos chaos control microcontroller implementation 05.40.Ca 05.45.-a 02.30.Yg 05.45.Pq 85.40.Bh 84.30.Bv

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Fluid-filled porous medium heated from the bottom and subjected to periodic gravity: analysis and microcontroller implementation

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PRAMANA-JOURNAL OF PHYSICS 2023年第4期97卷 175-175页

作者： Kibanya, Noel Nyang Vivekanandan, Gayathri Oumate, Alhadji Abba Kuiate, Gaetan Fautso Kingni, Sifeu Takougang Univ Bamenda Fac Sci Dept Phys POB 39 Bambili Cameroon Chennai Inst Technol Ctr Artificial Intelligence Chennai 600069 Tamilnadu India Univ Maroua Fac Sci Dept Phys POB 814 Maroua Cameroon Univ Bamenda Higher Teacher Training Coll Dept Phys POB 39 Bamenda Cameroon Univ Maroua Natl Adv Sch Mines & Petr Ind Dept Mech Petr & Gas Engn POB 46 Maroua Cameroon Univ Bamenda Natl Higher Polytech Inst Dept Mech & Ind Engn POB 39 Bamenda Cameroon

The analysis and microcontroller implementation of a Newtonian fluid-filled porous medium heated from the bottom and subjected to sinusoidal or non-sinusoidal periodic gravity is investigated in this paper. The Newtonian fluid-filled porous medium with a bottom source of heat and subjected to periodic gravity modulation is described by the equation of conservation of energy and hydrodynamic equations modified following the Boussinesq-Darcy approximation. Galerkin-truncated approximation is applied in reducing the resulting set of partial differential equations into a Lorenz-like system of ordinary differential equations of order 1. The Lorenz-like system obtained in this case is found to have three equilibrium points whose stability depends on the system parameters. Without gravity modulation and by varying the scaled Rayleigh number, it is demonstrated that the obtained Lorenz-like system displays steady convection, periodic convection, chaotic convection, reverse period doubling to chaotic convection and coexistence between steady and chaotic convections. In the presence of sinusoidal or non-sinusoidal periodic gravity modulation and by varying the scaled Rayleigh number, the obtained Lorenz-like system exhibits periodic convections, bistable periodic convections and period doubling to chaotic convections. Finally, the existence of periodic convections, bistable periodic convections and chaotic convections is confirmed by microcontroller results obtained from the microcontroller implementation of the obtained Lorenz-like system.

关键词： Porous medium Boussinesq-Darcy and Galerkin truncated approximations periodic gravity modulation steady periodic and chaotic convections bistable and coexisting convections microcontroller implementation 12.60.Jv 12.10.Dm 98.80.Cq 11.30.Hv

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Autonomous three-dimensional oscillator with five terms: spiking oscillations generation mechanism, microcontroller implementation and controls

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PHYSICA SCRIPTA 2023年第1期98卷 015214-015214页

作者： Ramakrishnan, Balamurali Kamdoum Tamba, Victor Mboupda Pone, Justin Roger Mbouna Ngueuteu, Serge Gervais Rajagopal, Karthikeyan Univ Dschang Elect Engn Dept UIT Fotso Victor Bandjoun Res Unit Automat & Appl Comp RU AIA POB 134 Bandjoun Cameroon Univ Dschang Dept Telecommun & Network Engn UIT Fotso Victor Bandjoun POB 134 Bandjoun Cameroon Univ Dschang Elect Engn Dept UIT FV Res Unit Automat & Appl Comp RU AIA POB 134 Bandjoun Cameroon Univ Yaounde I Fac Sci Lab Modelling & Simulat Engn Biomimet & Prototypes PO 812 Yaounde Cameroon Univ Yaounde I Fac Sci TWAS Res unit PO 812 Yaounde Cameroon

This paper presents a report on the microcontroller implementation of an autonomous three-dimensional oscillator with five terms (ATDOFT) and performance analysis based on partial and total amplitude controls. ATDOFT displays periodic spiking behaviors, period-tripling bifurcation to chaos, chaotic spiking attractors, coexisting attractors and bistable attractors. ATDOFT is divided into two subsystems;namely the fast and slow subsystems to investigate the mechanism of the spiking dynamics. Relying on the stability analysis based on the fast subsystem with respect to the slow variable, it is shown that the spiking oscillations present in the ATDOFT arise from the system switching between the unstable state and the stable state of the lone equilibrium point of the fast subsystem. By inserting two controller parameters into the rate equations of the ATDOFT, total and partial amplitude controls are achieved. Finally, the dynamical behaviors found in ATDOFT are validated by the microcontroller implementation.

关键词： autonomous oscillator periodic and chaotic spiking behaviors fast-slow dynamical oscillator bistable and coexisting attractors microcontroller implementation partial and total amplitude controls

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Resistive-capacitive shunted Josephson junction with unharmonic current-phase relation: Analysis and microcontroller implementation

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PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 2022年第0期603卷

作者： Ngongiah, Isidore Komofor Ramakrishnan, Balamurali Njitacke, Zeric Tabekoueng Kuiate, Gaetan Fautso Kingni, Sifeu Takougang Univ Bamenda Fac Sci Dept Phys POB 39 Bamenda Cameroon Chennai Inst Technol Ctr Nonlinear Syst Chennai 600069 Tamilnadu India Univ Buea Coll Technol Dept Elect & Elect Engn POB 63 Buea Cameroon Univ Bamenda Higher Teacher Training Coll Dept Phys POB 39 Bamenda Cameroon Univ Bamenda Natl Higher Polytech Inst Dept Mech & Ind Engn POB 39 Bamenda Cameroon Univ Maroua Natl Adv Sch Mines & Petr Ind Dept Mech Petr & Gas Engn POB 46 Maroua Cameroon

This paper discusses the theoretical analysis and microcontroller implementation of resistive-capacitive shunted Josephson junction (JJ) with unharmonic current-phase relation. The rate equations describing the system under study exhibit no, two, or four equilibrium points and their stability are *** presence of Pitchfork bifurcation depends on the unharmonic parameter and the external direct current (DC) source. The hysteresis of current-voltage characteristics in resistive-capacitive shunted JJ with unharmonic current-phase relation is sensitive to the unharmonic parameter. The system under study exhibits periodic oscillations, continuous spiking oscillations, periodic bursting oscillations, and chaotic attractors with varying shapes which are sensitive to the modulation and unharmonic parameters. Finally, the microcontroller implementation of resistive-capacitive shunted JJ with unharmonic current-phase relation is realized and the microcontroller results are qualitatively the same as those obtained during the numerical simulations. (C) 2022 Elsevier B.V. All rights reserved.

关键词： Unharmonic current-phase relation Continuous spiking oscillations Pitchfork bifurcation Hysteresis loop Periodic and chaotic bursting oscillations microcontroller implementation

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Josephson junction snap oscillator with megastability: microcontroller implementation and its applications to secure medical images

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PRAMANA-JOURNAL OF PHYSICS 2022年第4期96卷 175-175页

作者： Ramakrishnan, Balamurali Tsafack, Nestor Tsafack, Alex Stephane Kemnang Njitacke, Zeric Tabekoueng Kingni, Sifeu Takougang Chennai Inst Technol Ctr Nonlinear Syst Chennai 600069 Tamil Nadu India Univ Douala Elect Engn & Ind Comp Dept Res Unit Lab Energy & Artificial Intelligence RU ISTAMA POB 3223 Douala Cameroon Univ Buea Coll Technol Dept Elect & Elect Engn POB 63 Buea Cameroon Univ Maroua Fac Mines & Petr Ind Dept Mech Petr & Gas Engn POB 46 Maroua Cameroon

Megastability and coexisting attractors between periodic and self-excited chaotic attractors in the Josephson junction snap oscillator (JJSO) are reported in this paper. Two different cases are considered for this study. In one case, the JJSO is driven by a direct current (DC) whereas in the other case, it is driven by an alternative current (AC). The JJSO is implemented using a microcontroller to verify the numerical simulation results. The numerical simulations and microcontroller results have a qualitatively good agreement. Finally, an encryption scheme based on the modified Julia set, deoxyribonucleic acid (DNA) principle, and the sequences of the chaotic JJSO in this work are used to build a secure key to secure medical images. The plain colour image is decomposed into a blue component. The generated secure key is applied to one component to obtain the corresponding sparse components. Confusion keys are obtained from the chaotic JJSO to scramble each sparse component. Besides, the chaotic sequence is used to compress the confused sparse matrices corresponding to the blue components. Lastly, the component is quantified and a diffusion step is then applied to improve the randomness and consequently the information entropy.

关键词： Josephson junction snap oscillator megastability coexisting attractors microcontroller implementation chaos-based encryption

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Analysis and microcontroller implementation of Josephson junction driven by Wien bridge circuit

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PHYSICA SCRIPTA 2023年第4期98卷 045213-045213页

作者： Sriram, Balakrishnan Godonou, Daniel Maoussi Ainamon, Cyrille Ngongiah, Isidore Komofor Rajagopal, Karthikeyan Chennai Inst Technol Ctr Computat Modelling Chennai 600069 India Univ Abomey Calavi Inst Math & Sci Phys BP 613 Porto Novo Benin Univ Bamenda Fac Sci Dept Phys POB 39 Bamenda Cameroon Chennai Inst Technol Ctr Nonlinear Syst Chennai 600069 Tamil Nadu India Chandigarh Univ Univ Ctr Res & Dev Dept Elect & Commun Engn Mohali 140413 Punjab India

This paper recounts the dynamical investigations and microcontroller validation of Josephson junction (JJ) driven by Wien bridge circuit (WBC). Relying on the stability analysis of two equilibrium points found in JJ driven by WBC (JJDWBC), it is revealed that one equilibrium point is unconditionally stable while the other equilibrium point is unstable. The JJDWBC exhibits reverse period-doubling bifurcation, periodic attractors, period-doubling bifurcation, bistable chaotic attractors, and different presentations of monostable chaotic attractors. Partial and total amplitude controls are achieved by adding two controller parameters into the rate equations of JJDWBC. Finally, the microcontroller implementation is used to validate the dynamical behaviors found in JJDWBC.

关键词： josephson junction wien bridge circuit monostable chaotic attractors bistable chaotic attractors partial and total amplitude controls microcontroller implementation

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Josephson junction model with cosine interference term: Analysis, microcontroller implementation, and network analysis

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PHYSICA SCRIPTA 2021年第12期96卷 125232-125232页

作者： Ramadoss, Janarthanan Ngongiah, Isidore Komofor Chamgoue, Andre Cheage Mboupda Pone, Justin Roger Rajagopal, Karthikeyan Kingni, Sifeu Takougang Chennai Inst Technol Ctr Artificial Intelligence Chennai 600069 Tamil Nadu India Univ Bamenda Fac Sci Dept Phys POB 39 Bamenda Cameroon Univ Ngaoundere Sch Geol & Min Engn POB 115 Meiganga Cameroon Univ Dschang Elect Engn Dept IUT FV Res Unit Automat & Appl Comp RU AIA POB 134 Bandjoun Cameroon Chennai Inst Technol Ctr Nonlinear Syst Chennai 600069 Tamil Nadu India Univ Maroua Fac Mines & Petr Ind Dept Mech Petr & Gas Engn POB 46 Maroua Cameroon

The dynamical behavior of a single and network of Josephson junction (JJ) model with cosine interference term (CIT) is explored in this paper. The rate-equations describing a single JJ model with CIT have no or two equilibrium points as a function of direct current (DC). The stability of two equilibrium points reveals that one of the equilibrium points is stable node and other is saddle node. The presence of CIT leads to the change of regular spiking and intrinsic bursting to periodic bursting. JJ circuit model with CIT shows the existence of bistable periodic attractors, periodic attractors, hidden chaotic attractors, and coexisting attractors during the numerical simulations. By increasing the coherence parameter, the coexisting attractors are controlled to bistable limit cycles. The microcontroller implementation of the JJ model with CIT is implemented to ascertain the results of numerical simulations. To demonstrate the collective behavior of the JJ model with CIT, a lattice array of identical JJ models with CIT is constructed and studied. By considering the coupling constant as the control parameter, it is demonstrated that the existence of incoherent nodes for lower coupling values and formation of chimera states when the coupling strength is increased.

关键词： Josephson junction cosine interference term bistable and coexisting attractors hidden chaotic attractor microcontroller implementation chimera

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Fractional-order bi-Hopfield neuron coupled via a multistable memristor: Complex neuronal dynamic analysis and implementation with microcontroller

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AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 2025年 191卷

作者： Tamba, Victor Kamdoum Biamou, Arsene Loic Mbanda Pham, Viet-Thanh Grassi, Giuseppe Tagne, Francois Kapche Takougang, Armand Cyrille Nzeukou Univ Dschang Dept Telecommun & Network Engn IUT Fotso Victor Bandjoun POB 134 Bandjoun Cameroon Univ Dschang Dept Elect Engn Res Unit Automat & Appl Comp IUT FV Bandjoun POB 134 Bandjoun Cameroon Ind Univ Ho Chi Minh City Fac Elect Technol Ho Chi Minh City Vietnam Univ Salento Dept Engn Innovat I-73100 Lecce Italy Univ Dschang Fac Sci Dept Phys Res Unit Condensed Matter Elect & Signal Proc POB 67 Dschang Cameroon

The Hopfield neuron is an artificial neuron model used for pattern memorization and recognition. It exhibits a complex dynamic with stable states corresponding to memorized patterns. In order to grasp a more complete representation of the information exchange between two neurons, emphasizing the importance of neuronal connections in brain processing, we propose in this work the coupling of two fractional-order Hopfield neurons via a fractional-order flux-controlled multistable memristor. Each of these two neurons incorporates a selfcoupling memristive component, called an autapse memristor. Additionally, the second neuron is subjected to an external electromagnetic radiation, simulated by an additional memristor. The I-V characteristics of the memristors integrated in this model are analyzed through numerical simulations. The simulations of model dynamics versus its diverse parameters have revealed rich and complex dynamical behaviors. These simulations demonstrate that the proposed model generates a variety of homogeneous and heterogeneous chaotic attractors, distributed at diverse locations. The elaborated memristor coupled fractional-order bi-Hopfield neuron MCFBHN model is implemented on an Arduino-Due platform. A comparison of the results of the two approaches shows good consistency.

关键词： Fractional-order memristive Hopfield neural network Autapse memristor External electromagnetic radiation memristor Memristor initial boosting behaviors microcontroller implementation

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Novel Approach to Protect Advanced Encryption Standard Algorithm implementation Against Differential Electromagnetic and Power Analysis

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IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY 2015年第2期10卷 256-265页

作者： Masoumi, Massoud Rezayati, Mohammad Hadi Islamshahr Azad Univ Tehran *** Iran

This paper describes a novel approach for implementation of the advanced encryption standard (AES) algorithm, which provides a significantly improved strength against first-order differential electromagnetic and power analysis with a minimal additional overhead. Our method is based on randomization in composite field arithmetic, which entails a low implementation cost while does not alter the algorithm, does not reduce the working frequency, and keeps perfect compatibility with the published standard. The efficiency of the proposed technique was verified by practical results obtained from real implementation on an AT89C51AC2 microcontroller. Another contribution of this paper is that it describes experimental setup and the measurement probe, i.e., the critical piece of equipment for performing electromagnetic analysis attacks. Most of the probes that are used for electromagnetic attacks in the published papers are self-made and no detailed specification is available for them. The results of this paper can be served for protecting some microprocessor-based security tokens with limited resources such as smart cards.

关键词： Differential power analysis (DPA) differential electromagnetic analysis (DEMA) advanced encryption standard (AES) algorithm countermeasure techniques microcontroller implementation

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implementation of Lightweight Ciphers and Their Integration into Entity Authentication with IEEE 802.11 Physical Layer Transmission 14th

Implementation of Lightweight Ciphers and Their Integration ...

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14th International Symposium on Foundations and Practice of Security (FPS)

作者： Yi, Yunjie Mandal, Kalikinkar Gong, Guang Univ Waterloo Dept Elect & Comp Engn Waterloo ON N2L 3G1 Canada Univ New Brunswick Fac Comp Sci Fredericton NB Canada

ISBN: (纸本)9783031081477;9783031081460

This paper investigates the performance of three lightweight authenticated ciphers namely ACE, SPIX and WAGE in the WiFi and CoAP handshaking authentication protocols. We implement the WiFi and CoAP handshake protocols and the IEEE802.11a physical layer communication protocol in software defined radio (SDR) and embed these two handshaking protocols into the IEEE802.11a OFDM communication protocol to measure the performance of three ciphers. We present the construction of KDF and MIC used in the handshaking authentication protocols and provide optimized implementations of ACE, SPIX and WAGE including KDF and MIC on three different (low-power) microcontrollers. The performance results of these three ciphers when adopted in WiFi and CoAP protocols are presented. Our experimental results show that the cryptographic functionalities are the bottleneck in the handshaking and data protection protocols.

关键词： Internet of Things (IoT) Security and privacy Lightweight cryptography microcontroller implementation Authentication protocol IEEE 802.11a OFDM transmission Software defined radio

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