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circuit implementation of Power Converter for High-Speed Switching Operations

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Chinese Journal of Electrical Engineering 2018年第3期4卷 47-52页

作者： Keiji Wada Department of Electronics Engineering and Computer Science Tokyo Metropolitan UniversityTokyo Japan

Recently,high di/dt and dv/dt switching operations of power converter circuits has been discussed for realizing a high-efficiency power converter *** this case,parasitic inductances of the bus bar between a DC capacitor and power devices may cause issues of overshoot voltage and electromagnetic interference(EMI)***,it is necessary to design the bus bar geometry while considering the minimization and optimization of the parasitic inductance of bus *** paper discusses a relationship between bus bar geometry and switching *** addition,the bus bar analysis is based on the PEEC method,and the bus bar geometry is designed by considering the stray inductance with using an inductance-map ***,this paper also presents a design procedure of acceptable stray inductance based on a standardization *** should be noted that the stray inductance is designed not for minimization,but optimization,and it is shown not as an absolute value(H),but as a percentage value(%).Finally,the oscillation waveforms under turn-off operation will be discussed depending on the bus bar geometry.

关键词： Bus bar inductance bus bar geometry circuit implementation EMI switching characteristics

Hopf bifurcation analysis and circuit implementation for a novel four-wing hyper-chaotic system

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Chinese Physics B 2013年第8期22卷 325-332页

作者：薛薇齐国元沐晶晶贾红艳郭彦岭 Department of Automation Tianjin University of Science & Technology F'SATI/Department of Electrical Engineering Tshwane University of Technology

In the paper, a novel four-wing hyper-chaotic system is proposed and analyzed. A rare dynamic phenomenon is found that this new system with one equilibrium generates a four-wing-hyper-chaotic attractor as parameter varies. The system has rich and complex dynamical behaviors, and it is investigated in terms of Lyapunov exponents, bifurcation diagrams, Poincare maps, frequency spectrum, and numerical simulations. In addition, the theoretical analysis shows that the system undergoes a Hopf bifurcation as one parameter varies, which is illustrated by the numerical simulation. Finally, an analog circuit is designed to implement this hyper-chaotic system.

关键词： hyper-chaos four-wing chaotic system one equilibrium Hopf bifurcation circuit implementation

Dynamics of a Strengthened Chaotic System and Its circuit implementation

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Chinese Journal of Electronics 2014年第2期23卷 353-356页

作者： SUN Kehui LIU Xuan ZHU Congxu School of Physics and Electronics Central South University

To strengthen a chaotic system, a state feedback controller is applied to generate hyperchaotic behaviors based on the simplified Lorenz system, and a coordinate transformation is used for converting topological structure of the hyperchaotic system from two wings to four wings. Complex dynamics of the hyperchaotic and four-wing attractor system are analyzed and verified by Lyapunov exponent spectrums, bifurcation diagrams,phase portraits, Poincar′e sections and circuit *** circuit experiment results are agreed well with the simulation results, and it lays a good foundation for the chaotic secure communication.

关键词： Hyperchaos Multi-wing attractor Simplified Lorenz system circuit implementation

The Analysis of Flow Cryptographic Algorithm and the circuit implementation

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The Analysis of Flow Cryptographic Algorithm and the Circuit...

Dynamic analysis and circuit implementation of a new Lorenz-like chaotic system

第二届亚太地区信息论学术会议

作者： Lianqing ZHAO 1 Miaoying ZHAO 2 School of Electric and Electronic Engineering North China Electric Power University Beijing 102206

Flow password is an important password system in information security and *** passage analyzes three typical flow cryptographic algorithms based on linear feedback shift register-Pless generator,Clock-control sequence generator and A5 algorithm,and researches circuit implementation schemes of three *** shows that,Pless generator hardware performance is poor and vulnerable;clock-control method designed more complex,as clock-control sequence generator,is an ideal method to produce key flow using by linear shift register,and flow password system will be more safety;A5 algorithm statistical properties is good,and efficiency is very high,moreover,if using the longer and more series of linear feedback shift register,it will be more safety.

关键词： Flow password Pless generator Clock-control sequence generator A5 algorithm circuit implementation

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Dynamic analysis and circuit implementation of a new Lorenz-...

Design and implementation of a novel multi-scroll chaotic system

第十届动力学与控制学术会议

作者：熊丽刘振来 ZHANG Xin-guo School of Physics and Electromechanical Engineering He'xi University School of Information Science and Engineering Lan'zhou University

This paper proposed a new Lorenz-like chaotic system. The nonlinear characteristics anddynamic behaviors are studied by using nonlinear dynamics theory. Some numerical simulations are made to demonstrate the chaotic characteristics of the new chaotic system. However, the numerical solutions of the basic Lorenz equation are not able to be implemented by using general circuit components. Thus, in practice, it often needs to be varied to make proper adjustments of these variables. After scaling transformation, it fully conforms to the requirements of the circuit design in practical applications. Then, the hardware circuit of the proposed Lorenz-like chaotic system is designed based on the circuit theory. Compared with the existing Lorenz chaotic circuit, the circuit has the advantages of simple structure, simple line connection, low cost and convenient debugging. The comprehensive performance of the circuit is very good. Moreover, in order to illustrate the effectiveness of the proposed Lorenz-like circuit, some numerical simulations are presented by Multisim software. In addition, the proposed chaotic Lorenz-like circuit is implemented by analog electronic circuit, which is characterized by its high accuracy and good robustness. It can be seen from the simulation results and the experimental results that the comprehensive performance of the proposed Lorenz-like chaotic system seems to be satisfactory for practical circuit applications. Numerical simulations and experimental results show that the proposed scheme is effective and the circuit has certain practical application value.

关键词： Lorenz-like chaotic system Lyapunov exponent Multisim circuit implementation

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Chinese Physics B 2009年第1期18卷 119-129页

作者：张朝霞禹思敏 College of Automation Guangdong University of Technology

This paper proposes a novel approach for generating a multi-scroll chaotic system. Together with the theoretical design and numerical simulations, three different types of attractor are available, governed by constructing triangular wave, sawtooth wave and hysteresis sequence. The presented new multi-scroll chaotic system is different from the classical multi-scroll chaotic Chua system in dimensionless state equations, nonlinear functions and maximum Lyapunov exponents. In addition, the basic dynamical behaviours, including equilibrium points, eigenvalues, eigenvectors, eigenplanes, bifurcation diagrams and Lyapunov exponents, are further investigated. The success of the design is illustrated by both numerical simulations and circuit experiments.

关键词： multi-scroll chaotic attractors triangular and sawtooth waves hysteresis sequence circuit implementation

Forming and implementing a hyperchaotic system with rich dynamics

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Chinese Physics B 2011年第9期20卷 115-122页

作者：刘文波邓榤生陈关荣 College of Automatic Engineering Nanjing University of Aeronautics and Astronautics Department of Electronic Engineering City University of Hong Kong

A simple three-dimensional （3D） autonomous chaotic system is extended to four-dimensions so as to generate richer nonlinear dynamics. The new system not only inherits the dynamical characteristics of its parental 3D system but also exhibits many new and complex dynamics, including assembled 1-scroll, 2-scroll and 4-scroll attractors, as well as hyperchaotic attractors, by simply tuning a single system parameter. Lyapunov exponents and bifurcation diagrams are obtained via numerical simulations to further justify the existences of chaos and hyperchaos. Finally, an electronic circuit is constructed to implement the system, with experimental and simulation results presented and compared for demonstration and verification.

关键词： chaotic circuit circuit implementation hyperchaotic system Lyapunov exponent

Novel two-directional grid multi-scroll chaotic attractors based on the Jerk system

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Chinese Physics B 2020年第10期29卷 541-549页

作者： Peng-Fei Ding Xiao-Yi Feng Cheng-Mao Wu School of Electronics and Information Northwestern Polytechnical UniversityXi'an 710072China School of Electronics and Engineering Xi'an University of Posts and TelecommunicationsXi'an 710121China

A new method is presented to generate two-directional (2D) grid multi-scroll chaotic attractors via a specific form of the sine function and sign function series, which are applied to increase saddle points of index 2. The scroll number in the x-direction is modified easily through changing the thresholds of the specific form of the sine function, while the scroll number in the y-direction is controlled by the sign function series. Some basic dynamical properties, such as equilibrium points, bifurcation diagram, phase portraits, and Lyapunov exponents spectrum are studied. Furthermore, the electronic circuit of the system is designed and its simulation results are given by Multisim 10.

关键词： grid multi-scroll chaotic attractor Jerk system specific form of the sine function circuit implementation

A novel one equilibrium hyper-chaotic system generated upon Lü attractor

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Chinese Physics B 2010年第2期19卷 135-144页

作者：贾红艳陈增强袁祉 Department of Automation Nankai University Department of Automation Tianjin University of Science and Technology

By introducing an additional state feedback into a three-dimensional autonomous chaotic attractor Lü system, this paper presents a novel four-dimensional continuous autonomous hyper-chaotic system which has only one equilibrium. There are only 8 terms in all four equations of the new hyper-chaotic system, which may be less than any other four-dimensional continuous autonomous hyper-chaotic systems generated by three-dimensional （3D） continuous autonomous chaotic systems. The hyper-chaotic system undergoes Hopf bifurcation when parameter c varies, and becomes the 3D modified Lü system when parameter k varies. Although the hyper-chaotic system does not undergo Hopf bifurcation when parameter k varies, many dynamic behaviours such as periodic attractor, quasi periodic attractor, chaotic attractor and hyper-chaotic attractor can be observed. A circuit is also designed when parameter k varies and the results of the circuit experiment are in good agreement with those of simulation.

关键词： hyper-chaotic bifurcation circuit implementation Lyapunov exponents