Results 81 to 90 of about 272,878 (339)
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
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 +6 more
openaire +3 more sources
Fractional order modeling and control of a smart beam [PDF]
, 2017 Smart beams are one of the most frequently used means of studying vibrations in airplane wings. Their mathematical models have been so far solely based on classical approaches that ultimately involve integer order transfer functions.
Birs, Isabela R. +3 more
core +2 more sources
FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
wiley +1 more source
Fractional Calculus Applied to the Generalized Model and Control of an Electrohydraulic System
Fractal and FractionalIn this paper, fractional calculus is used to develop a generalized fractional dynamic model of an electrohydraulic system composed of a servo valve and a hydraulic cylinder, where a fractional position controller PIγDμ is proposed for minimizing the ...
Edgar Hiram Robles +5 more
doaj +1 more source
Design of FOPID Controller for Pneumatic Control Valve Based on Improved BBO Algorithm
Sensors, 2022 Aiming at the problems of nonlinearity and inaccuracy in the model of the pneumatic control valve position in the industrial control process, a valve position control method based on a fractional-order PID controller is proposed. The working principle of
Min Zhu +3 more
doaj +1 more source
IEEE Access, 2021 This paper proposes a cascaded Proportional Integral-Fractional Order Proportional-Integral-Derivative (PI-FOPID) controller to improve the frequency response of a hybrid microgrid system. The optimum gains of the proposed controller are fine-tuned using
Moetasem Ali +3 more
semanticscholar +1 more source
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
Structural biology of ferritin nanocages
FEBS Letters, EarlyView.Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley +1 more source
Rotational speed control of multirotor UAV's propulsion unit based on fractional-order PI controller [PDF]
, 2017 In this paper the synthesis of a rotational speed closed-loop control system based on a fractional-order proportional-integral (FOPI) controller is presented.
Coelho, J.P. +5 more
core +1 more source