scholarly journals SPICE Behaviors of Double Memristor Circuits Using Cosine Window Function

2021 ◽  
Vol 9 ◽  
Author(s):  
Kai-Da Xu ◽  
Donghao Li ◽  
Yannan Jiang ◽  
Qiang Chen
Keyword(s):  
Window Function ◽  
Charge Voltage ◽  
Hewlett Packard ◽  
Pspice Simulation ◽  
In Series ◽  
Linear And Nonlinear ◽  
High Flexibility ◽  
Flux Charge

In this paper, a Hewlett-Packard (HP) memristor model with a new window function and its versatile characteristics are presented. SPICE behaviors of the linear and nonlinear memristor model are studied through PSpice simulation. High flexibility is demonstrated for emulating the behaviors of the practical HP memristors. Furthermore, the characteristics of the composite SPICE behaviors are both investigated when two memristors are connected in series and in parallel. The polarity of each memristor is also taken into consideration. The relationships among flux, charge, voltage, current, and memristance of the double memristor circuits are simulated and analyzed.

scholarly journals SPICE Behaviors of Double Memristor Circuits Using Cosine Window Function

2020 ◽  
Author(s):  
Kai-Da Xu ◽  
Donghao Li ◽  
Qiang Chen
Keyword(s):  
Window Function ◽  
Charge Voltage ◽  
Hewlett Packard ◽  
Pspice Simulation ◽  
In Series ◽  
Linear And Nonlinear ◽  
High Flexibility ◽  
Flux Charge

<a>In this paper, a</a> Hewlett-Packard (HP) memristor model with a new window function and its versatile characteristics are presented. SPICE behaviors of the linear and nonlinear memristor model are studied through PSpice simulation. High flexibility is demonstrated for emulating the behaviors of the practical HP memristors. Furthermore, the characteristics of the composite SPICE behaviors are both investigated when two memristors are connected in series and in parallel. The polarity of each memristor is also taken into consideration. The relationships among flux, charge, voltage, current, and memristance of the double memristor circuits are simulated and analyzed.

scholarly journals SPICE Behaviors of Double Memristor Circuits Using Cosine Window Function

2020 ◽  
Author(s):  
Kai-Da Xu ◽  
Donghao Li ◽  
Qiang Chen
Keyword(s):  
Window Function ◽  
Charge Voltage ◽  
Hewlett Packard ◽  
Pspice Simulation ◽  
In Series ◽  
Linear And Nonlinear ◽  
High Flexibility ◽  
Flux Charge

<a>In this paper, a</a> Hewlett-Packard (HP) memristor model with a new window function and its versatile characteristics are presented. SPICE behaviors of the linear and nonlinear memristor model are studied through PSpice simulation. High flexibility is demonstrated for emulating the behaviors of the practical HP memristors. Furthermore, the characteristics of the composite SPICE behaviors are both investigated when two memristors are connected in series and in parallel. The polarity of each memristor is also taken into consideration. The relationships among flux, charge, voltage, current, and memristance of the double memristor circuits are simulated and analyzed.

scholarly journals Mitigating the seismic pounding of multi-story buildings in series using linear and nonlinear fluid viscous dampers

2021 ◽  
Vol 21 (4) ◽  
Author(s):  
Hytham Elwardany ◽  
Robert Jankowski ◽  
Ayman Seleemah
Keyword(s):  
Substantial Improvement ◽  
Point Of View ◽  
Steel Buildings ◽  
Viscous Dampers ◽  
Element Analysis ◽  
Fluid Viscous Dampers ◽  
Adjacent Buildings ◽  
In Series ◽  
Linear And Nonlinear ◽  
Nonlinear Fluid

AbstractSeismic-induced pounding between adjacent buildings may have serious consequences, ranging from minor damage up to total collapse. Therefore, researchers try to mitigate the pounding problem using different methods, such as coupling the adjacent buildings with stiff beams, connecting them using viscoelastic links, and installing damping devices in each building individually. In the current paper, the effect of using linear and nonlinear fluid viscous dampers to mitigate the mutual pounding between a series of structures is investigated. Nonlinear finite-element analysis of a series of adjacent steel buildings equipped with damping devices was conducted. Contact surfaces with both contactor and target were used to model the mutual pounding. The results indicate that the use of linear or nonlinear dampers leads to the significant reduction in the response of adjacent buildings in series. Moreover, the substantial improvement of the performance of buildings has been observed for almost all stories. From the design point of view, it is concluded that dampers implemented in adjacent buildings should be designed to resist maximum force of 6.20 or 1.90 times the design independent force in the case of using linear or nonlinear fluid viscous dampers, respectively. Also, designers should pay attention to the design of the structural elements surrounding dampers, because considerable forces due to pounding may occur in the dampers at the maximum displaced position of the structure.

scholarly journals High-Flexibility MPPT Techniques with Communication Scan Network for PV Micro-Grid System

Processes ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 117
Author(s):  
Yu-Kai Chen ◽  
Hong-Wen Hsu ◽  
Chau-Chung Song ◽  
Yu-Syun Chen
Keyword(s):  
Output Voltage ◽  
High Efficiency ◽  
Maximum Power ◽  
Global Maximum ◽  
Switching Frequency ◽  
Grid System ◽  
Pv System ◽  
In Series ◽  
Micro Grid ◽  
High Flexibility

This paper proposes the design and implementation of inductor-inductor-capacitor (LLC) converters with modules connected in series with the power scan method and communication scan network (CSN) to achieve MPPT and regulate the output voltage for the PV micro-grid system. The Dc/Dc converters includes six isolated LLC modules in series to supply ±380 V output voltage and track the maximum power point of the PV system. The series LLC converters are adopted to achieve high efficiency and high flexibility for the PV micro-grid system. The proposed global maximum power scan technique is implemented to achieve global maximum power tracking by adjusting the switching frequency of the LLC converter. To improve the system flexibility and achieve system redundancy, module failure can be detected in real time with a communication scan network, and then the output voltage of other modules will be changed by adjusting the switching frequency to maintain the same voltage as before the failure. Additionally, the proposed communication scan network includes the RS-485 interface of the MPPT series module and the CAN BUS communication interface with other subsystems’ communication for the PV micro-grid application system. Finally, a 6 kW MPPT prototype with a communication scan network is implemented and the proposed control method is verified for the PV system.

scholarly journals Identification of Linear and Nonlinear Sensory Processing Circuits from Spiking Neuron Data

2018 ◽  
Vol 30 (3) ◽  
pp. 670-707 ◽  
Author(s):  
Dorian Florescu ◽  
Daniel Coca
Keyword(s):  
Sensory Processing ◽  
Neuron Model ◽  
Linear Filter ◽  
Spiking Neuron ◽  
Neuron Models ◽  
Integrate And Fire ◽  
Spiking Neuron Model ◽  
In Series ◽  
Linear And Nonlinear ◽  
Model Equations

Inferring mathematical models of sensory processing systems directly from input-output observations, while making the fewest assumptions about the model equations and the types of measurements available, is still a major issue in computational neuroscience. This letter introduces two new approaches for identifying sensory circuit models consisting of linear and nonlinear filters in series with spiking neuron models, based only on the sampled analog input to the filter and the recorded spike train output of the spiking neuron. For an ideal integrate-and-fire neuron model, the first algorithm can identify the spiking neuron parameters as well as the structure and parameters of an arbitrary nonlinear filter connected to it. The second algorithm can identify the parameters of the more general leaky integrate-and-fire spiking neuron model, as well as the parameters of an arbitrary linear filter connected to it. Numerical studies involving simulated and real experimental recordings are used to demonstrate the applicability and evaluate the performance of the proposed algorithms.

scholarly journals Solving Systems of Volterra Integral and Integrodifferential Equations with Proportional Delays by Differential Transformation Method

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Şuayip Yüzbaşı ◽  
Nurbol Ismailov
Keyword(s):  
Exact Solution ◽  
Nonlinear Equations ◽  
Taylor Series ◽  
Transformation Method ◽  
Integrodifferential Equations ◽  
Differential Transformation Method ◽  
Differential Transformation ◽  
Proportional Delays ◽  
In Series ◽  
Linear And Nonlinear

In this paper, the differential transformation method is applied to the system of Volterra integral and integrodifferential equations with proportional delays. The method is useful for both linear and nonlinear equations. By using this method, the solutions are obtained in series forms. If the solutions of the problem can be expanded to Taylor series, then the method gives opportunity to determine the coefficients of Taylor series. Hence, the exact solution can be obtained in Taylor series form. In illustrative examples, the method is applied to a few types of systems.

scholarly journals Identification of Circuit Parameters for the Specified or Measured Performances

2015 ◽  
Vol 61 (1) ◽  
pp. 95-100
Author(s):  
Jerzy Rutkowski
Keyword(s):  
Computational Complexity ◽  
Circuit Design ◽  
Analog Circuit ◽  
Circuit Theory ◽  
High Accuracy ◽  
Circuit Parameter ◽  
Analog Circuit Design ◽  
Pspice Simulation ◽  
Linear And Nonlinear ◽  
Current Difference

Abstract Extension of the method of analog circuit parameter identification for the specified design performances, originally presented by the same author in 1982, is described. These parameters are designated by means of PSpice simulation of the adjoint circuit to the original one. In this adjoint circuit, elements of the original circuit, described by the sized parameters, are replaced by controlled sources. Each such source is controlled by the differential voltage or current, difference between the calculated voltage or current and the specified one, with infinitely large gain. The method is applicable to both linear and nonlinear DC circuits and AC circuits and can be used in many fields of analog circuit design, such as: finding of acceptability region, analog fault diagnosis, postproduction identification and tuning. In the later cases, design performances are replaced by measurements of Circuit Under Test (CUT). Simplicity, extremely low computational complexity and high accuracy are the main benefits of the proposed, basic Circuit Theory based, approach - the solution is found after a single PSpice simulation. For better understanding of the presented methodology, five practical examples are discussed

Monolithic Leg Design With Compliant Knee Joint for Bipedal Robots: Design and Preliminary Results

2020 ◽  
Author(s):  
Ciaphus Rouse ◽  
Trevor Warnix ◽  
Martin Garcia ◽  
Ayse Tekes
Keyword(s):  
Knee Joint ◽  
Biped Robot ◽  
Servo Motor ◽  
Bipedal Robots ◽  
Dynamic Simulations ◽  
Biped Robots ◽  
Spring Element ◽  
Single Piece ◽  
In Series ◽  
High Flexibility

Abstract Design and control of human-like robots mimicking the motion using biped legs are still in demand. However, the vast majority of the biped robots are too heavy due to the number of actuators and their bulky design. Compliant designs can mimic the motions in nature through the large deformation of their compliant members and have the ability to be designed as a single piece thereby reducing the overall weight and increasing the performance of the mechanism. Biped robots specifically designed for walking currently existing in the literature often arranged in series form. Although serial design leads high flexibility, each link carries its actuator compromising the overall weight and stability. This paper presents the design and development of a bioinspired leg for biped robots without the requirement of actuation of the knee or addition of a spring element. Each leg is designed as a single piece by exploiting a compliant knee joint, 3D printed using TPU filament and actuated through a cam design using a servo motor. Servo motor is also attached to the trunk which serves as the torso of the robot body. Zero moment point (ZMP) analysis is performed by adopting simple cart-table and inverted pendulum methods. Stiffness of the compliant knee is obtained from multibody dynamic simulations in MSC Adams. The preliminary testing of the bio-inspired biped robot reveals that the robot performs successful periodic gait.

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