نتایج جستجو برای: fractional order control

تعداد نتایج: 2176850  

2016
S. COMAN

The major contribution of this paper is to introduce the fractional calculus used to develop a fractional-order model for the DC electrical drive and, based on it, to design a fractional adaptive controller. In such a context, two modifications of the conventional Model Reference Adaptive Control theory are presented. Based on simulation results obtained in Matlab/ Simulink, the benefits of fra...

Journal: :Fractal and fractional 2022

This paper presents a design and evaluation of fractional-order self optimizing control (FOSOC) architecture for process control. It is based on real-time derivative-free optimization layer that adjusts the parameters discrete-time proportional integral (FOPI) controller according to an economic cost function. A simulation benchmark designed assess performance FOSOC first order plus dead time s...

Journal: :international journal of advanced design and manufacturing technology 0
somayeh norouzi ghazbi center of excellence on soft computing and intelligent information processing, ferdowsi university of mashhad alireza akbarzadeh center of excellence on soft computing and intelligent information processing (scip) ferdowsi university of mashhad

abstract: this paper presents dynamic modelling and control of a linear prismatic series of elastic actuator. the capability of generating large torques is why this actuator is increasingly used in human-assistive robotic systems. due to having human in the loop, the actuator requires precise control. a fractional pid controller known for its improved performance is used for the control, due to...

In this study, we propose a secure communication scheme based on the synchronization of two identical fractional-order chaotic systems. The fractional-order derivative is in Caputo sense, and for synchronization, we use a robust sliding-mode control scheme. The designed sliding surface is taken simply due to using special technic for fractional-order systems. Also, unlike most manuscripts, the ...

‎In this paper, we investigate the chaotic behaviors of the fractional-order permanent magnet synchronous motor (PMSM) system. The necessary condition for the existence of chaos in the fractional-order PMSM system is deduced and an active controller is developed based on the stability theory for fractional systems. The presented control scheme  is simple and flexible, and it is suitable both fo...

Journal: :international journal of mathematical modelling and computations 0
noureddine bouarroudj unité de recherche appliquée en energies renouvelables, uraer, centre de développement des energies renouvelables, cder, 47133 ghardaïa, algeria algeria d. boukhetala b. benlahbib b. batoun

the aim of this paper is to design a fractional order sliding mode controllers (fosmc)for a class of dc-dc converters such as boost and buck converters. firstly, the control lawis designed with respect to the properties of fractional calculus, the design yields an equiv-alent control term with an addition of discontinuous (attractive) control law. secondly, themathematical proof of the stabilit...

This paper deals with a ratio-dependent functional response predator-prey model with a fractional order derivative. The ratio-dependent models are very interesting, since they expose neither the paradox of enrichment nor the biological control paradox. We study the local stability of equilibria of the original system and its discretized counterpart. We show that the discretized system, which is...

2017
Khatir Khettab Yassine Bensafia Samir Ladaci Mohamed Boudiaf

In this paper, a Fractional Adaptive Fuzzy Logic Control (FAFLC) strategy based on active fractional sliding mode (FSM) theory is considered to synchronize chaotic fractional-order systems. Takagi-Sugeno fuzzy systems are used to estimate the plant dynamics represented by unknown fractional order functions. One of the main contributions in this work is to combine an adaptive fractional order PI...

2003
MANUEL F. SILVA J. A. T. MACHADO A. M. LOPES

This paper studies the performance of integer and fractional order controllers in a hexapod robot with joints at the legs having viscous friction and flexibility. For that objective the robot prescribed motion is characterized in terms of several locomotion variables. The walking performance is analysed through the Nyquist stability criterion and several indices that reflect the system dynamica...

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