Scopus Research — Essam Zuheir Fadhel yakoob

In this article, the modeling and model-based control of a motorcycle like inverted pendulum system with a gyroscope controller are addressed. The mathematical model of the system which includes an inverted pendulum and two gyroscopic flywheels is derived using the Lagrange equations. A problem arising from the derived dynamic model is that the system is highly nonlinear and unstable. Hence, the derived model is linearized to obtain a state-space model. Based on the linearized model, a controller and a state observer are designed. The controller is designed to generate required moment for stabilization using the two flywheel gyroscopes in the system. The observability and controllability of the designed observer and controller is verified based on the locations of the system eigenvalues. Several simulations are carried out in this work using the derived state-space model and the designed controller to ensure the efficiency of the model-based controlled system. ©2025 The authors. This article is published by IIETA and is licensed under the CC BY 4.0 license

Many engineering applications are made of boron carbide as a material that includes a unique combination of properties. One of the main properties of boron carbide is that it has thermal stability and a high melting point which makes it the perfect choice for refractory application. It also has a high abrasion resistance which makes it a good abrasive powder. The low density and high hardness properties are relevant for boron carbide to be excelled in ballistic performance It is frequently utilized in nuclear-based applications like that of a neutron absorber. Additionally, a high-temperature semiconductor namely, boron carbide could be utilized for wide electronic applications. Boron carbide (B4C)-filled epoxy glue mechanical characteristics were investigated. Two distinct B4C particle sizes and quantities were evaluated. The capacity of B4C to absorb neutrons is a significant attribute in the nuclear industry and represents one of the material's advantages. To evaluate the degree of interaction between matrix and B4C, the bending strength was also investigated. The structural instability phenomenon of boron carbide under externally induced high stresses and the characteristics of the resultant disordered phase are also explored. The volume fraction of filler components in the composite was adjusted, and good wear resistance and other mechanical characteristics were produced from nano-filled glass-epoxy. All the weight % composite samples are assessed for their tensile strength. The tensile strength of base metal has been enhanced with the addition of fiberglass and nano boron carbide/epoxy. © 2025 Editura Politechnica. All rights reserved.

The mechanical properties of a newly developed polymeric nanocomposite material, including its fabrication, formation, and performance, were investigated through experimental and numerical analysis. The obtained results were then compared with mechanical test results of the newly produced multiwalled carbon material. The composite material was formulated by incorporating nanotubes, carbon fibers, and epoxy in specific weight ratios, enabling it to withstand both mechanical and environmental stresses when implemented in engineering applications. Additionally, vibration response analysis was conducted using ANSYS simulation software, employing evolutionary numerical methods. This analysis provided insights into the behavior of the material under different mechanical conditions. Through a comprehensive understanding of the material's performance in mechanical engineering tests and the optimization of weight ratios, a new nanomaterial was successfully created, meeting the desired engineering specifications and advancing the field of nanoscience. © 2024 Author(s).

In this study, the focus is on exploring the remarkable world of aircraft structures with the aim of creating a material that pushes boundaries and garners global attention. The successful formulation of a composite material is investigated by skillfully manipulating weight and quantity ratios. To achieve the desired outcome, different weight ratios of multiwalled carbon nanotubes (MWNTs), specifically 8g and 16g, are combined. Furthermore, these MWNTs are proportionately mixed with epoxy in volumes of 200ml, 400ml, 600ml, and 800ml, following a valence equation that correlates the gram ratio of MWNTs with epoxy. For the purpose of ensuring homogeneity and facilitating optimal component blending, an electric convector with a magnetic core is employed to generate vortices, aiding in the thorough mixing of the constituents. Subsequently, the mixture is hardened after proper placement. Prior to casting, the introduction of the hardener, whether in its liquid state or by incorporating reinforcement layers of carbon nanofibers (ranging from 0 to 16 layers), enhances and fortifies the desired properties of the material. The ingenuity of this approach is showcased by the exceptional results obtained from the evaluation of tensile stress and impact. Through rigorous testing and meticulous analysis, the findings validate the theoretical foundation upon which this endeavor is built, underscoring the success of this innovative concept. © 2023 Regional Association for Security and crisis management. All rights reserved.

The main idea of this paper is to present the modeling and simulation of an individual 5DOF degrees of freedom robotic arm. The main axis of the modeling design will be up to the branch of science that makes up Mechatronics. The methods that have been used for the 3D model construction are presented as well as the methods for the simulation. The kinematics problem for the robot system under study is elaborated. Both forward and inverse kinematics is addressed in detail. The CAD model design is also presented. The model parameters are defined for the 3D model and the parameters are used as a base to diverge for the real system. thanks to CAD model translation to SimMechanics model, there is no need for the dynamic equations of motion derivation. The model in SimMechanics is adjusted properly for the trajectory tracking simulation. Several simulations are presented to validate the kinematics solution and the dynamics requirements for the motion. The results presented in the article shows the effectivity of the new softwares in modeling and control of engineering systems. © 2022 Institut za Istrazivanja. All rights reserved.

This study deals with the effect of complex material made from (Kevlar29, Honeycomb Aluminium and Carbon fibers) under high velocity is measured, also this material tested to specify the mechanical properties, then the high-impact loading utilizing the energy absorption tests were performed experimentally by using a gas gun device with shape of impactors flat cylindrical bullets. The discussion of the results of this work was termed under the failure of the coupling mode of the projectiles. The velocity level and defamatory affect the kinetic energy of the projectile. The thickness of the target has an impact on the projectile speed. The findings are discussed in terms of the work done to link the failure modes with the kinetic energy fall of the projectile and its effect on ballistic maximum velocity. The effect on the rate of the target thickness was then addressed. The vitality assimilation was anticipated by expecting that all out work done in the disfigurement of the plates is comparable to the total loss of the motor vitality of the shot. The connection between possible speed and the thickness of composite material was perceived. The hypothetical outcomes demonstrated great understanding contrasted and the test work. © International University of Sarajevo.