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Enhancing variable frequency drive efficiency using fractional hybrid Particle Swarm Optimization and comprehensive thermal management [PDF]

open access: yesScientific Reports
This study proposes a Fractional Calculus Hybrid Approach to enhance the dynamic and thermal performance of vector-controlled Permanent Magnet Synchronous Motor (PMSM) drives.
Kashif Habib   +6 more
doaj   +2 more sources

Minimization Problems for Functionals Depending on Generalized Proportional Fractional Derivatives

open access: yesFractal and Fractional, 2022
In this work we study variational problems, where ordinary derivatives are replaced by a generalized proportional fractional derivative. This fractional operator depends on a fixed parameter, acting as a weight over the state function and its first-order
Ricardo Almeida
doaj   +1 more source

Euler–Lagrange-Type Equations for Functionals Involving Fractional Operators and Antiderivatives

open access: yesMathematics, 2023
The goal of this paper is to present the necessary and sufficient conditions that every extremizer of a given class of functionals, defined on the set C1[a,b], must satisfy.
Ricardo Almeida
doaj   +1 more source

Optimal State Control of Fractional Order Differential Systems: The Infinite State Approach

open access: yesFractal and Fractional, 2021
Optimal control of fractional order systems is a long established domain of fractional calculus. Nevertheless, it relies on equations expressed in terms of pseudo-state variables which raise fundamental questions.
Jean-Claude Trigeassou, Nezha Maamri
doaj   +1 more source

A Stochastic Fractional Calculus with Applications to Variational Principles

open access: yesFractal and Fractional, 2020
We introduce a stochastic fractional calculus. As an application, we present a stochastic fractional calculus of variations, which generalizes the fractional calculus of variations to stochastic processes.
Houssine Zine, Delfim F. M. Torres
doaj   +1 more source

Variational Problems Involving a Generalized Fractional Derivative with Dependence on the Mittag–Leffler Function

open access: yesFractal and Fractional, 2023
In this paper, we investigate the necessary conditions to optimize a given functional, involving a generalization of the tempered fractional derivative.
Ricardo Almeida
doaj   +1 more source

Modified Mittag-Leffler Functions with Applications in Complex Formulae for Fractional Calculus

open access: yesFractal and Fractional, 2020
Mittag-Leffler functions and their variations are a popular topic of study at the present time, mostly due to their applications in fractional calculus and fractional differential equations.
Arran Fernandez, Iftikhar Husain
doaj   +1 more source

Herglotz Variational Problems Involving Distributed-Order Fractional Derivatives with Arbitrary Smooth Kernels

open access: yesFractal and Fractional, 2022
In this paper, we consider Herglotz-type variational problems dealing with fractional derivatives of distributed-order with respect to another function.
Fátima Cruz   +2 more
doaj   +1 more source

Further Research for Lagrangian Mechanics within Generalized Fractional Operators

open access: yesFractal and Fractional, 2023
In this article, the problems of the fractional calculus of variations are discussed based on generalized fractional operators, and the corresponding Lagrange equations are established.
Chuanjing Song
doaj   +1 more source

Construction and Evaluation of a Control Mechanism for Fuzzy Fractional-Order PID

open access: yesApplied Sciences, 2022
In this research, a control mechanism for fuzzy fractional-order proportional integral derivatives was suggested (FFOPID). The fractional calculus application has been used in different fields of engineering and science and showed to be improved in the ...
Mujahed Al-Dhaifallah
doaj   +1 more source

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