Articles Scientifiquehttp://dspace.univ-msila.dz:8080//xmlui/handle/123456789/43762024-03-29T12:51:32Z2024-03-29T12:51:32ZInterval Type-2 Fuzzy Logic-Second Order Sliding Mode Based Fault Detection and Active Fault-Tolerant Control of Brushless DC MotorIzzeddine DilmiAbderrahmen BouguerraAli DjriouiLarbi Chrifi-Alaouihttp://dspace.univ-msila.dz:8080//xmlui/handle/123456789/419182024-01-09T13:59:25Z2021-01-01T00:00:00ZInterval Type-2 Fuzzy Logic-Second Order Sliding Mode Based Fault Detection and Active Fault-Tolerant Control of Brushless DC Motor
Izzeddine Dilmi; Abderrahmen Bouguerra; Ali Djrioui; Larbi Chrifi-Alaoui
This paper addresses the detection of the short-circuit faults and the active fault tolerant
control (AFTC) of the brushless direct current motor (BLDCM) based on the interval type 2 fuzzy-second order sliding mode. In this article, the main idea consists of using an
algorithm to detect the fault in an electric current. This algorithm corrects the detected
fault. In this study, a hybrid technique of fault tolerant control is proposed. This technique
based on interval type 2 fuzzy logic and second order sliding mode. Also, it facilitates the
procedures for setting and controlling the velocity of BLDCM. For that, a dynamic model
for direct current has been established. Furthermore, short circuit faults have also been
introduced between turns to test the robustness of the control laws. Finally, a theoretical
analysis is presented and the simulations are presented in order to validate the proposed
control strategy. The proposed AFTC can then achieve favorable tracking performance
2021-01-01T00:00:00ZNumerical study of high‑efciency CIGS solar cells by inserting a BSF µc‑Si:H layerRafk ZouacheIdris BouchamaOkba Saidani· Layachi DjedouiElyazid Zaidihttp://dspace.univ-msila.dz:8080//xmlui/handle/123456789/417702023-12-20T14:33:14Z2022-01-01T00:00:00ZNumerical study of high‑efciency CIGS solar cells by inserting a BSF µc‑Si:H layer
Rafk Zouache; Idris Bouchama; Okba Saidani; · Layachi Djedoui; Elyazid Zaidi
In this paper, we present a simulation study of Cu(In,Ga)Se2 (CIGS) based solar cell using a physically based two-dimensional
device simulator Silvaco-Atlas under AM1.5 illumination. First, we studied the efect of CIGS layer thickness, doping con centrations, and defects on the J–V properties and the quantum efciency (QE) of a conventional cell. The simulated structure
shows an open circuit voltage equal to 0.80 V, a short circuit current density equal to 30.03 mA/cm2
, a fll factor equal to
82.77% and the obtained efciency of the conventional cell is 19.80% with CIGS absorber layer thickness of about 1.5 μm,
our simulation results of the CIGS solar cell are in good agreement with the simulated and experimental results found in
literature. In order to improve the solar cells efciency, the back surface feld (BSF) based on hydrogenated microcrystal line silicon μc-Si:H(p+) layer has been inserted between the back contact (Mo) and the CIGS absorber layer, in this case
the structure presents an open voltage equal to 0.84 V, a short circuit current density equal to 32.55 mA/cm2
, a fll factor
equal to 85.31% and an efciency of 23.42%. The obtained results demonstrate that the addition of μc-Si:H(p+) BSF layer
increases the efciency of CIGS solar cells, reaching a maximum value of 23.42% for 1.5 μm of CIGS thickness and 10 nm
for μc-Si:H(p+) BSF layer
2022-01-01T00:00:00ZSampling Rate Optimization for Improving the Cascaded Integrator Comb Filter CharacteristicsRaouf AmraneYoucef BrikSamir ZeghlacheMohamed LadjalDjamel Chicouchehttp://dspace.univ-msila.dz:8080//xmlui/handle/123456789/396402023-06-19T13:12:21Z2020-01-01T00:00:00ZSampling Rate Optimization for Improving the Cascaded Integrator Comb Filter Characteristics
Raouf Amrane; Youcef Brik; Samir Zeghlache; Mohamed Ladjal; Djamel Chicouche
The cascaded integrator comb (CIC) filters are characterized by coefficient less and reduced hardware requirement, which make them an economical finite impulse response (FIR) class in many signal processing applications. They consist of an integrator section working at the high sampling rate and a comb section working at the low sampling rate. However, they don’t have well defined frequency response. To remedy this problem, several structures have been proposed but the performance is still unsatisfactory. Thence, this paper deals with the improvement of the CIC filter characteristics by optimizing its sampling rate. This solution increases the performance characteristics of CIC filters by improving the stopband attenuation and ripple as well as the passband droop. Also, this paper presents a comparison of the proposed method with some other existing structures such as the conventional CIC, the sharpened CIC, and the modified sharpened CIC filters, which has proven the effectiveness of the proposed method.
2020-01-01T00:00:00ZP&O or IC for PV Pumping System: what MPPT Algorithm to Improve Performances?A. HarragA. TitraouH. Bahrihttp://dspace.univ-msila.dz:8080//xmlui/handle/123456789/344322022-11-14T09:43:33Z2022-01-01T00:00:00ZP&O or IC for PV Pumping System: what MPPT Algorithm to Improve Performances?
A. Harrag; A. Titraou; H. Bahri
This paper discusses the performance
improvement of photovoltaic water pumping system using both
P&O and IC MPPT controllers. The efficiency of both
proposed MPPT controller has been studied successfully using
a DC motor-pump powered by thirty six PV modules fed by
DC-DC boost converter controlled using both P&O as well as
IC MPPT algorithms. Comparative study results obtained
using Matlab/Simulink environment show that the IC
outperforms the P&O method in term of convergence speed;
while the P&O method presents better performance for the
steady state oscillation in case of high level insolation. In case of
low level insolation (point C), the steady state oscillations
around the MPP point are less in IC compared to those in P&O
algorithm.
2022-01-01T00:00:00Z