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Wyszukujesz frazę "Sabah, Noor" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Comparative study on the impact transition behaviour of PPS reinforces with 40% VF Glass
Autorzy:
Kadhim, Rand Fadhil
Jassim, Noor Alhuda Sabah
Abdulhasan, Maryam Jawad
Powiązania:
https://bibliotekanauki.pl/articles/13800133.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
PPS
glass fiber
mechanical properties
thermal properties
włókno szklane
właściwości mechaniczne
właściwości termiczne
Opis:
Composite materials, in most cases polymers reinforced with fibers, are these days utilized in numerous applications such as aerospace applications in which lightweight, high strength, high specific modulus and low temperature resistance are critical issues. As these materials have possible applications in different designing areas, a lot of work has been put into enhancing their performance. This study's aim was to study the impact transition behavior of PPS and its composite under different ranges of temperatures by investigating their thermal, mechanical and structural characteristics. PPS and its composite reinforced with 40% vf (volume fraction) glass fibers are employed in this study. The impact transition behavior of PPS and 40%Vf glass fibers composite were investigated by analyzing the mechanical properties: impact, tensile, bending and, hardness at the following temperature ranges: 23°C, -26°C, and -78°C. A particular refrigerator and dry ice were used to achieve the extremely low temperatures (-26 C and -78 C, respectively). The results showed that the addition of 40% glass fibers improved the impact transition behavior of 40%GF PPS composite with temperature decreasing. Which with decreasing in temperature from 23˚C to -78˚C, the impact strength of PPS decreased by fifty five percent while it increased by twenty three percent for 40%GF PPS composite.
Źródło:
Diagnostyka; 2023, 24, 3; art. no. 2023314
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal sliding mode controller design based on whale optimization algorithm for lower limb rehabilitation robot
Autorzy:
Sabah, Noor
Hameed, Ekhlas
Al-Huseiny, Muayed S
Powiązania:
https://bibliotekanauki.pl/articles/1956062.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
Optimal Sliding Mode Controller
Whale Optimization Algorithm
lower limb
rehabilitation robot
kończyna dolna
robot rehabilitacyjny
Opis:
The Sliding Mode Controllers (SMCs) are considered among the most common stabilizer and controllers used with robotic systems due to their robust nonlinear scheme designed to control nonlinear systems. SMCs are insensitive to external disturbance and system parameters variations. Although the SMC is an adaptive and model-based controller, some of its values need to be determined precisely. In this paper, an Optimal Sliding Mode Controller (OSMC) is suggested based on Whale Optimization Algorithm (WOA) to control a two-link lower limb rehabilitation robot. This controller has two parts, the equivalent part, and the supervisory controller part. The stability assurance of the controlled rehabilitation robot is analyzed based on Lyapunov stability. The WO algorithm is used to determine optimal parameters for the suggested SMC. Simulation results of two tested trajectories (linear step signal and nonlinear sine signal) demonstrate the effectiveness of the suggested OSMC with fast response, very small overshoot, and minimum steady-state error.
Źródło:
Applied Computer Science; 2021, 17, 3; 47-59
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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