Results 41 to 50 of about 177,367 (278)

Fractional order heroin epidemic dynamics

Alexandria Engineering Journal, 2021
Using illicit drugs has been on growth in all over the world especially in the USA, Europe and Asia. It is very harmful to society; it is the fourth foremost cause of death in the United States when taking overdose drug (about the same as motor vehicle ...
Zain Ul Abadin Zafar, Hadi Rezazadeh, Mustafa Inc, Kottakkaran Sooppy Nisar, Tukur A. Sulaiman, Abdullahi Yusuf   +5 more
doaj   +1 more source

HIL real-time simulation of a digital fractional order PI controller for time delay processes [PDF]

, 2013
Fractional order control has been used extensively in the last decade for controlling various types of processes. Several design approaches have been proposed so far, the closed loop performance results obtained being tested using different simulation ...
Both, Roxana, Dulf, Eva H, Ionescu, Clara-Mihaela, Muresan, Cristina I, Neaga, A   +4 more
core   +1 more source

Fractional-Order Hartley Oscillator [PDF]

2018 14th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME), 2018
A fractional-order capacitor (FOC) is developed using a Molybdenum disulfide ferroelectric polymer composite. The fabricated FOC exhibits constant phase over five decades between 100 Hz-10 MHz, which is the broadest operating frequency bandwidth reported so far for an FOC.
Agamyrat Agambayev, Aslihan Kartci, Ali H. Hassan, Norbert Herencsar, Hakan Bagci 0001, Khaled N. Salama   +5 more
openaire   +2 more sources

Fractional-Order LC Three-Phase Inverter Using Fractional-Order Virtual Synchronous Generator Control and Adaptive Rotational Inertia Optimization

Machines
The application of fractional calculus in power electronics modeling provides an innovative method for improving inverter performance. This paper presents a three-phase inverter topology with fractional-order LC filter characteristics, analyzes its ...
Junhua Xu, Chunwei Wang, Yue Lan, Bin Liu, Yingheng Li, Yongzeng Xie   +5 more
doaj   +1 more source

Fractional Order Difference Equations

International Journal of Differential Equations, 2012
A difference equation is a relation between the differences of a function at one or more general values of the independent variable. These equations usually describe the evolution of certain phenomena over the course of time. The present paper deals with
J. Jagan Mohan, G. V. S. R. Deekshitulu
doaj   +1 more source

Design and practical implementation of a fractional order proportional integral controller (FOPI) for a poorly damped fractional order process with time delay

, 2019
One of the most popular tuning procedures for the development of fractional order controllers is by imposing frequency domain constraints such as gain crossover frequency, phase margin and iso-damping properties.
Birs, Isabela Roxana, Copot, Dana, Ionescu, Clara-Mihaela, Muresan, Cristina, Nascu, Ioan   +4 more
core   +1 more source

Modeling and Control Research of Fractional-Order Cascaded H-Bridge Multilevel STATCOM

Fractal and Fractional
This paper introduces fractional-order capacitors and fractional-order inductors into the conventional integer-order cascaded H-bridge multilevel static compensator (ICHM-STATCOM), thereby constructing the main circuit of the fractional-order cascaded H ...
Junhua Xu, Songqin Tang, Guopeng He, Zheng Gong, Guangqing Lin, Jiayu Liu   +5 more
doaj   +1 more source

Fractional Order Dynamic Positioning Controller [PDF]

TransNav, 2015
Improving the performance of Dynamic Positioning System in such applications as station keeping, position mooring and slow speed references tracking requires improving the position and heading control precision.
Anna Witkowska
doaj   +1 more source

Non-existence of periodic solutions in fractional-order dynamical systems and a remarkable difference between integer and fractional-order derivatives of periodic functions

, 2011
Using the Mellin transform approach, it is shown that, in contrast with integer-order derivatives, the fractional-order derivative of a periodic function cannot be a function with the same period.
Kaslik, Eva, Sivasundaram, Seenith
core   +1 more source

Hybrid Systems and Control With Fractional Dynamics (I): Modeling and Analysis

, 2014
No mixed research of hybrid and fractional-order systems into a cohesive and multifaceted whole can be found in the literature. This paper focuses on such a synergistic approach of the theories of both branches, which is believed to give additional ...
HosseinNia, S. Hassan, Tejado, Ines, Vinagre, Blas M.   +2 more
core   +1 more source