Results 41 to 50 of about 25,989 (292)

Consensus Tracking of Fractional‐Order Multiagent Systems via Fractional‐Order Iterative Learning Control [PDF]

Complexity, 2019
In this work, the consensus problem of fractional‐order multiagent systems with the general linear model of fixed topology is studied. Both distributed PDα‐type and Dα‐type fractional‐order iterative learning control (FOILC) algorithms are proposed. Here, a virtual leader is introduced to generate the desired trajectory, fixed communication topology is
Shuaishuai Lv, Mian Pan, Xungen Li, Qi Ma, Tianyi Lan, Bingqiang Li, Wenyu Cai   +6 more
openaire   +3 more sources

Fractional Order Models of Industrial Pneumatic Controllers

Abstract and Applied Analysis, 2014
This paper addresses a new approach for modeling of versatile controllers in industrial automation and process control systems such as pneumatic controllers.
Abolhassan Razminia, Dumitru Baleanu
doaj   +1 more source

Novel blade angle controllers techniques based on heuristics algorithms

Ain Shams Engineering Journal, 2022
The raised pollution census and the electricity demand–supply gab are significantly increasing the investments in the wind energy (WE). Thus, the paper is dedicated to the wind farm blade angle controllers’ efficiency.
Ahmed M. Shawqran, Abdallah El-Marhomy, Mahmoud A. Attia, Mohamed Z. Kamh   +3 more
doaj   +1 more source

Optimal frequency control in microgrid system using fractional order PID controller using Krill Herd algorithm [PDF]

, 2020
This paper investigates the use of fractional order Proportional, Integral and Derivative (FOPID) controllers for the frequency and power regulation in a microgrid power system. The proposed microgrid system composes of renewable energy resources such as
Gabbar, Hossam, Helaimi, M’hamed, Othman, Ahmed, Regad, Mohamed, Taleb, Rachid   +4 more
core   +1 more source

CFOA-Based Fractional Order PIλDδ Controller

Electronics ETF, 2017
Conventional Current Feedback Operational Amplifier (CFOA) is not current controllable or not electronically controllable. It is thus of interest to add a current mirror into the CFOA in order to make it current controllable. This modification can be achieved by using Diamond Transistor (DT) instead of going through complicated IC fabrication process ...
Tada Comedang, Pattana Intan
openaire   +3 more sources

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

Fractional-order feedback control of a poorly damped system [PDF]

, 2014
This study presents the design of a fractional-order proportional-integral (FOPI) controller for a mass-spring-damper system which is poorly damped. A model based design technique is used to design a FOPI controller for this system. A good performance of
Chevalier, Amélie, Copot, Cosmin, Copot, Dana, De Keyser, Robain, Ionescu, Clara-Mihaela   +4 more
core   +2 more sources

Implementing Discrete-time Fractional-order Controllers [PDF]

Journal of Advanced Computational Intelligence and Intelligent Informatics, 2001
The theory of fractional calculus goes back to the beginning of the theory of differential calculus but its inherent complexity postponed the application of the associated concepts. In the last decade the progress in the areas of chaos and fractals revealed subtle relationships with the fractional calculus leading to an increasing interest in the ...
openaire   +2 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Event-Based Implementation of Fractional Order IMC Controllers for Simple FOPDT Processes

Mathematics, 2020
Fractional order calculus has been used to generalize various types of controllers, including internal model controllers (IMC). The focus of this manuscript is towards fractional order IMCs for first order plus dead-time (FOPDT) processes, including ...
Cristina I. Muresan, Isabela R. Birs, Eva H. Dulf   +2 more
doaj   +1 more source