Results 1 to 10 of about 25,159 (166)

Active realization of fractional order Butterworth lowpass filter using DVCC

Journal of King Saud University: Engineering Sciences, 2020
This paper presents an active realization of fraction order Butterworth lowpass filter using a differential voltage current conveyor (DVCC) and two fractance devices (FDs). Initially, the DVCC based fractional order system transfer function is developed.
Shalabh Kumar Mishra, Maneesha Gupta, Dharmendra Kumar Upadhyay   +2 more
doaj   +3 more sources

Triple Estimation of Fractional Variable Order, Parameters, and State Variables Based on the Unscented Fractional Order Kalman Filter

Sensors, 2021
In this paper, a method for states, parameters, and fractional order estimation is presented. The proposed method is an extension of the traditional dual estimation method and uses three blocks of filters with appropriate data interconnections.
Dominik Sierociuk, Michal Macias
doaj   +3 more sources

Fractional-order inverse filters revisited: Equivalence with fractional-order controllers

Microelectronics Journal, 2023
The equivalence of fractional-order inverse filters with fractional-order controllers is demonstrated in this work. This is achieved by appropriately rewriting the filters transfer functions in order to clarify the correspondence between the gain and time-constant of the filters and the scaling factor and differentiation/integration constant of the ...
Bertsias, Panagiotis, Psychalinos, Costas, Minayi, Şahram, Yeşil, Abdullah, Elwakil, Ahmed, Yeşil, Abdullah   +5 more
openaire   +5 more sources

Backstepping Control with a Fractional-Order Command Filter and Disturbance Observer for Unmanned Surface Vehicles

Fractal and Fractional, 2023
In the paper, a backstepping control strategy based on a fractional-order finite-time command filter and a fractional-order finite-time disturbance observer is proposed for the trajectory tracking control of an unmanned surface vehicle.
Runan Ma, Jian Chen, Chengxing Lv, Zhibo Yang, Xiangyu Hu   +4 more
doaj   +1 more source

Research on the State of Charge of Lithium-Ion Battery Based on the Fractional Order Model

Energies, 2021
Accurate estimation of the state of charge (SOC) of lithium batteries is paramount to ensuring consistent battery pack operation. To improve SOC estimation accuracy and suppress colored noise in the system, a fractional order model based on an unscented ...
Lin Su, Guangxu Zhou, Dairong Hu, Yuan Liu, Yunhai Zhu   +4 more
doaj   +1 more source

Power-Efficient Electronically Tunable Fractional-Order Filter

Fractal and Fractional, 2023
This article describes a low-voltage, low-power fractional-order low-pass filter (FO-LPF) of order 1 + α, which is implemented using a voltage differencing differential difference amplifier (VDDDA).
Sadaf Tasneem, Rajeev Kumar Ranjan, Sajal K. Paul, Norbert Herencsar   +3 more
doaj   +1 more source

Adaptive Neural Network Finite-Time Control of Uncertain Fractional-Order Systems with Unknown Dead-Zone Fault via Command Filter

Fractal and Fractional, 2022
In this paper, the adaptive finite-time control problem for fractional-order systems with uncertainties and unknown dead-zone fault was studied by combining a fractional-order command filter, radial basis function neural network, and Nussbaum gain ...
Xiongfeng Deng, Lisheng Wei
doaj   +1 more source

Optimized fractional low and highpass filters of (1 + α) order on FPAA [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences, 2020
This work proposes an optimum design and implementation of fractional-order Butterworth filter of order (1 + α), with the help of analog reconfigurable field-programmable analog array (FPAA).
N. Singh, U. Mehta, K. Kothari, M. Cirrincione   +3 more
doaj   +1 more source

State of Charge Estimation of Lithium-Ion Batteries Based on Fuzzy Fractional-Order Unscented Kalman Filter

Fractal and Fractional, 2021
The covariance matrix of measurement noise is fixed in the Kalman filter algorithm. However, in the process of battery operation, the measurement noise is affected by different charging and discharging conditions and the external environment ...
Liping Chen, Yu Chen, António M. Lopes, Huifang Kong, Ranchao Wu   +4 more
doaj   +1 more source

Survey on designing Fractional-order Filters: Metaherustic approach [PDF]

Fayoum University Journal of Engineering, 2023
International scholars have recently demonstrated significant interest in fractional order filters (FOF) due to their greater design freedom and continuously stepped stop-band attenuation rate.
andrew amin, Mennatullah Albarawy, Amr Mabrouk   +2 more
doaj   +1 more source