Search results
1 – 3 of 3Tadeusz Sobczyk and Michał Radzik
The purpose of this study is to identify a novel methodology for direct calculation of steady-state periodic solutions for electrical circuits described by nonlinear differential…
Abstract
Purpose
The purpose of this study is to identify a novel methodology for direct calculation of steady-state periodic solutions for electrical circuits described by nonlinear differential equations, in the time domain.
Design/methodology/approach
An iterative algorithm was created to determine periodic steady-state solutions for circuits with nonlinear elements in a chosen set of time instants.
Findings
This study found a novel differential operator for periodic functions and its application in the steady-state analysis.
Research limitations/implications
This approach can be extended to the determination of two- or multi-periodic solutions of nonlinear dynamic systems.
Practical implications
The complexity of the steady-state analysis can be reduced in comparison with the frequency-domain approach.
Originality/value
This study identified novel difference equations for direct steady-state analysis of nonlinear electrical circuits.
Details
Keywords
Tadeusz Sobczyk, Michał Radzik and Natalia Radwan-Pragłowska
To identify the properties of novel discrete differential operators of the first- and the second-order for periodic and two-periodic time functions.
Abstract
Purpose
To identify the properties of novel discrete differential operators of the first- and the second-order for periodic and two-periodic time functions.
Design/methodology/approach
The development of relations between the values of first and second derivatives of periodic and two-periodic functions, as well as the values of the functions themselves for a set of time instants. Numerical tests of discrete operators for selected periodic and two-periodic functions.
Findings
Novel discrete differential operators for periodic and two-periodic time functions determining their first and the second derivatives at very high accuracy basing on relatively low number of points per highest harmonic.
Research limitations/implications
Reduce the complexity of creation difference equations for ordinary non-linear differential equations used to find periodic or two-periodic solutions, when they exist.
Practical implications
Application to steady-state analysis of non-linear dynamic systems for solutions predicted as periodic or two-periodic in time.
Originality/value
Identify novel discrete differential operators for periodic and two-periodic time functions engaging a large set of time instants that determine the first and second derivatives with very high accuracy.
Details
Keywords
Tadeusz Sobczyk, Michał Radzik and Jarosław Tulicki
This paper aims to omit the difficulties of directly finding the periodic steady-state solutions for electromagnetic devices described by circuit models.
Abstract
Purpose
This paper aims to omit the difficulties of directly finding the periodic steady-state solutions for electromagnetic devices described by circuit models.
Design/methodology/approach
Determine the discrete integral operator of periodic functions and develop an iterative algorithm determining steady-state solutions by a multiplication of matrices only.
Findings
An alternative method to creating finite-difference relations directly determining steady-state solutions in the time domain.
Research limitations/implications
Reduction of software and hardware requirements for determining steady-states of electromagnetic.
Practical implications
A unified approach for directly finding steady-state solutions for ordinary nonlinear differential equations presented in the normal form.
Originality/value
Eliminate the necessity of solving high-order finite-difference equations for steady-state analysis of electromagnetic devices described by circuit models.
Details