scholarly journals DEVELOPMENT OF BEHAVIORAL MODEL FOR SWITCHING VOLTAGE REGULATOR MICROCIRCUIT 1290EF1

2021 ◽  
Author(s):  
Aleksey Shkolin
Keyword(s):  
Numerical Experiment ◽  
Nonlinear Dynamic ◽  
Behavioral Model ◽  
Frequency Characteristics ◽  
Full Scale ◽  
Pulse Voltage ◽  
Voltage Regulator ◽  
Switching Voltage ◽  
Voltage Converter ◽  
Domestic Production

The issue of developing a behavioral model of pulse voltage converter IC is considered on the example of a microcircuit of domestic production 1290EF1. In order to verify the adequacy of the model, taking into account its frequency characteristics, recommendations and basic requirements are given when performing a full-scale and numerical experiment to determine the frequency characteristics of such type of nonlinear dynamic objects.

scholarly journals Dynamic characteristics of mean type dimension lathe installed on rubber-metal anti-vibration supports

2017 ◽  
Vol 2 (5) ◽  
pp. 26-30
Author(s):  
А. Денисенко ◽  
A. Denisenko
Keyword(s):  
Dynamic Model ◽  
Elastic Deformation ◽  
Dynamic Characteristics ◽  
Nonlinear Dynamic ◽  
Vibration Isolation ◽  
Elastic Characteristic ◽  
Frequency Characteristics ◽  
Experimental Dependence ◽  
Proof System ◽  
Nonlinear Dynamic Model

On the basis of a nonlinear dynamic model of a vibration-proof system at power excitation there are formed amplitude-frequency characteristics of a lathe installed on rubber-metal anti-vibration supports, and an area of efficient vibration isolation is defined. An elastic characteristic of the model is presented as an approximating dependence obtained on the basis of the experimental dependence of support elastic deformation changes upon loading.

scholarly journals Vertical turbulent exchange structure and parametrization for 3D shallow water hydrodynamics models

2021 ◽  
Vol 2131 (2) ◽  
pp. 022017
Author(s):  
A I Sukhinov ◽  
A E Chistyakov ◽  
S V Protsenko ◽  
E A Protsenko
Keyword(s):  
Experimental Data ◽  
Numerical Experiment ◽  
Shallow Water ◽  
Software Package ◽  
Full Scale ◽  
Turbulent Exchange ◽  
Exchange Coefficient ◽  
Calculation Results ◽  
Exchange Structure ◽  
Turbulent Exchange Coefficient

Abstract The work describes research of vertical turbulent exchange structure and parametrization for 3D shallow water hydrodynamics models. In this paper, the coefficients of horizontal turbulent exchange are calculated using a whole set of averaging periods of turbulent velocity pulsations. Using experimental data on the pulsations of the velocity components, the coefficient of vertical turbulent exchange was calculated on the basis of various approaches to its parameterization, based on the analysis of the obtained coefficient distributions, the most adequate parameterization of the coefficient was selected, which is used in the software package. The distribution of the vertical turbulent exchange coefficient obtained in a numerical experiment was compared with the results of full-scale measurements, and the calculation results obtained using the mathematical statistics apparatus were analysed.

NUMERICAL FREQUENCY RESPONSE ANALYSIS OF SWITCHING CONVERTERS BEHAVIORAL MODELS

2019 ◽  
Author(s):  
Aleksey Shkolin
Keyword(s):  
Time Domain ◽  
Nonlinear Dynamic ◽  
Frequency Characteristics ◽  
Response Analysis ◽  
Switching Converters ◽  
Behavioral Models ◽  
Pulse Converter ◽  
Signal Mode ◽  
The Time Domain ◽  
Simulated Object

This work is devoted to a method for numerically determining the frequency characteristics when modeling nonlinear dynamic objects, in particular during behavioral modeling of pulse converter circuits. The analysis of existing methods for modeling the frequency characteristics of pulse converters is carried out. A technique is given for reducing the amount of calculations when calculating the frequency characteristics of models of nonlinear dynamic pulse systems in the field of their stability based on a calculation in the time domain. This allows one to take into account the essential features of the studied nonlinear objects, in contrast to the linearized models applicable only to the small signal mode. The method is based on the use of correlation analysis when finding the steady-state stationary motion of the simulated object in the time domain while varying the frequency of the harmonic input signal. The results of modeling using the proposed approach are presented.

Monoharmonic method for calculating the frequency characteristics of the dynamic stiffness of nonlinear dynamic objects

2020 ◽  
pp. 94-102
Author(s):  
Oleg B. BELONOGOV
Keyword(s):  
Nonlinear Dynamic ◽  
Dynamic Stiffness ◽  
Algorithm Design ◽  
Fourier Method ◽  
Equation System ◽  
Frequency Characteristics ◽  
Computational Error ◽  
Dynamic Object ◽  
Power Cylinder ◽  
Dynamic Objects

The paper comprises results of algorithm design for monoharmonic method for calculating the frequency characteristics of the dynamic stiffness of nonlinear dynamic objects with a specified computational error and for a minimum time. The proposed alternative method relates to auto-integration methods and is based on numerical integration of the nonlinear differential equation system for a mathematical model of a dynamic object with monoharmonic input actions at fixed frequencies, and analysis of responses to these actions by Fourier method. The integration process at each fixed frequency continues until the average values of Fourier coefficients of the investigated harmonic of dynamic stiffness of a nonlinear dynamic object on the input monoharmonic force or moment action for a passed number of periods of the input signal become sensibly constant. The efficiency of the developed method and algorithm is studied using the example of calculation of frequency characteristics of the dynamic stiffness of a hydraulic power cylinder with closed hydraulic lines. The obtained frequency characteristics of the dynamic stiffness can be used to evaluate the damping properties of nonlinear dynamic objects. Key words: frequency characteristics of dynamic stiffness; calculation method; nonlinear dynamic objects.

A Self-Driven Soft-Switching Voltage Regulator for Future Microprocessors

2005 ◽  
Vol 20 (4) ◽  
pp. 806-814 ◽  
Author(s):  
J. Zhou ◽  
M. Xu ◽  
J. Sun ◽  
F.C. Lee
Keyword(s):  
Soft Switching ◽  
Voltage Regulator ◽  
Switching Voltage
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