List of Articles

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  1 - Dynamic model of static synchronous compensator in Single-Machine Infinite-Bus power system
  S. Zanjani
  20.1001.1.27834441.2023.15.1.1.8
  Electric loads such as electric arc furnaces, and heavy industrial plants can produce or absorb reactive power. Due to the instantaneous change of loads, the reactive power balance is essential in a power system. Static synchronous compensator (STATCOM) is usually used More

  Electric loads such as electric arc furnaces, and heavy industrial plants can produce or absorb reactive power. Due to the instantaneous change of loads, the reactive power balance is essential in a power system. Static synchronous compensator (STATCOM) is usually used to control the reactive power. By controlling the reactive power absorbed or injected into the power system, it makes the voltage at the point of connection to the grid. This compensator is used in two stable operating modes, inductive (lag) and capacitive (leading), to improve the performance of the power system. In this paper, a single-machine power system with shunt compensator is considered and the aim is to determine the relationship between voltage and current between the compensator and the transmission line. An approximate model is considered for the compensator, where the compensator current plays the main role. Then, using the analysis of algebraic equations, the voltage in the compensating bus was determined. Finally, the simulation results show the behavior of the compensator for different modes. Manuscript profile
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  2 - Feedback linearization controller design for a geared transmission system considering asymmetric backlash and friction
  Shima Mirshahzadeh Hamed Khodadadi
  20.1001.1.27834441.2023.15.1.2.9
  This study is focused on the mathematical modeling, analysis, and controlling of a Geared Transmission System (GTS). Although GTS is used widely in mechanical equipment and mechatronics, the existence of nonlinearities such as backlash and friction made some challenges More

  This study is focused on the mathematical modeling, analysis, and controlling of a Geared Transmission System (GTS). Although GTS is used widely in mechanical equipment and mechatronics, the existence of nonlinearities such as backlash and friction made some challenges for its position control. In this paper's proposed method for GTS, the stribeck friction nonlinearity is estimated based on the motor velocity by a linear model. By this approach, the GTS model is reduced to a two-piecewise function. In addition, the asymmetric non-differentiable dead zone is approximated by a differentiable function. Additionally, using the differentiable function for the approximation leads to a reduction in the number of the piecewise function and therefore the number of switching in GTS output. Afterward, a feedback linearization controller is designed for the introduced model, and its stability and tracking of the reference trajectory are investigated. Simulation results indicate the designed controller on the proposed model has a good performance compared to the other models and complete tracking is realized without any steady-state error. Furthermore, due to the structure of the proposed model, position tracking is performed at the lowest time and by the minimum switching number. Manuscript profile
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  3 - Effect of friction stir welding parameters of aluminum alloy tubes on succeeding rotary draw bending
  Alireza Soleymanipoor Hamid Montazerolghaem Mohsen Loh-mousavi
  20.1001.1.27834441.2023.15.1.3.0
  Thin-walled aluminum alloy tubes utilized for industrial applications like aviation and car manufacturing can be produced by various processes which are mainly divided into seamless and welded tubes. The utilization of welded tubes is desired to meet the increasing need More

  Thin-walled aluminum alloy tubes utilized for industrial applications like aviation and car manufacturing can be produced by various processes which are mainly divided into seamless and welded tubes. The utilization of welded tubes is desired to meet the increasing need for production efficiency and flexibility in design particularly when the shape cross section is asymmetrical. In this study, the possibility of attaining the defect-free and manufacturing of friction stir welded tube of AA 6061-T6 having a wall thickness of 2.5 mm was carried out and process parameters were optimized to get a visually defect-free welded tube. In the next step, the characterization of welded tubes using rotary draw bending of the welded tubes was done. With the increase in the welding speed, the average ovality in bent tubes was decreased and with the increase in the bending speed, the ovality was decreased in rotary draw bending of friction stir welded aluminum tubes. Manuscript profile
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  4 - Estimation and mapping of the global component of solar radiation and wind power density over Chad
  Marcel Hamda Soulouknga Iman Pishkar Dieudonné Kaoga Kidmo Mehdi Jahangiri
  20.1001.1.27834441.2023.15.1.4.1
  Despite its very good potential of Chad in the field of wind and solar energy, very few studies have been conducted in the field of evaluation and estimation of these energies. Therefore, in order to develop the exploitation of these resources, for the first time, findi More

  Despite its very good potential of Chad in the field of wind and solar energy, very few studies have been conducted in the field of evaluation and estimation of these energies. Therefore, in order to develop the exploitation of these resources, for the first time, finding suitable places for the construction of wind and solar power plants has been done to help the decision-makers in the field of energy in Chad. The purpose of this work is to establish a solar map and the wind map of Chad using the geographic information system(GIS). ArcMap software was used to draw GIS maps, and determining the amount of radiation and wind speed in the neighboring points of the investigated stations was done using the Inverse Distance Weighted(IDW) method. Weibull distribution function was used to estimate wind power density and three analytical methods were used to estimate solar radiation. By comparing the different values of solar radiation, the lowest value was in N'Djamena (5.74kWh/m2/day) and the highest in Abeche (6.35kWh/m2/day). It turns out that the windiest site is Faya-Largeau located in the Saharan area with a value of 28.61W/m2. However, in the Sahelian zone, the wind density of Bokoro is the lowest at 3.16W/m2. Based on the results, the resource maps showing the wind power densities and solar irradiation over the entire regions of Chad were developed. Thus, the exploitation of solar energy seems favorable to meet the deficit in energy needs, and the use of technology namely wind turbines is desirable. Manuscript profile
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  5 - The mechanical performance of silk and collagen nanoparticles for dental applications
  Mohammad Hossein Malekipour Esfahani Behnoush Selahbarzin
  20.1001.1.27834441.2023.15.1.5.2
  Today, great interest has been generated by dental science and engineering researchers to use bio-based nanoparticles to deliver therapeutic molecules such as drugs, genes, and tissue engineering. Controlling particle size, charge, surface morphology and release rate of More

  Today, great interest has been generated by dental science and engineering researchers to use bio-based nanoparticles to deliver therapeutic molecules such as drugs, genes, and tissue engineering. Controlling particle size, charge, surface morphology and release rate of loaded molecules is important for using nanoparticles based on biopolymers and bioactive ceramics such as tricalcium phosphates (TCP) as drug/gene carriers. Recently, drug release systems and nanoparticle systems have attracted much attention as suitable carriers. Drug delivery systems are methods used to ensure that drugs reach the required areas in the body. Natural polymers such as proteins have attracted a lot of attention due to their biocompatibility properties with living organisms. Among polymers, silk fibers have attracted the attention of researchers in the field of textiles and medicine due to their good properties such as low specific gravity, strength and high thermal resistance. In addition, their use as carriers of drugs, therapeutic genes and biomaterials for tissue engineering with applications in the field of dental and orthopedic materials has been reviewed. Manuscript profile
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  6 - Lattice Boltzmann method for natural convection of nanofluid flow in a trapezoidal-shaped sinusoidal cavity by considering Brownian motion
  Nemat Ebrahimi Hossein Ahmadi Danesh Ashtiani Davood Toghraie
  20.1001.1.27834441.2023.15.1.6.3
  Using the lattice Boltzmann technique, the mixed convection of nanofluid inside an inclined trapezoidal cavity in the presence of a multidirectional magnetic field is investigated. The sides of the trapezoidal hollow are adiabatic, with the upper moveable wall being col More

  Using the lattice Boltzmann technique, the mixed convection of nanofluid inside an inclined trapezoidal cavity in the presence of a multidirectional magnetic field is investigated. The sides of the trapezoidal hollow are adiabatic, with the upper moveable wall being cold and the lower wall being sinusoidally heated. In simulations, the temperature and flow distribution functions are utilized to determine all parameters related to the temperature and flow fields. On the hot wall, the effects of various Rayleigh numbers (Ra = 103, 104, and 105), inclined cavity angles (θ= 0°-90°), volume fractions of nanoparticles (ϕ== 0-3 percent), magnetic field intensity (Ha = 0-100), and applied magnetic field angle (= 0°-90°) were studied. According to the research, raising the Rayleigh number enhances heat transfer. Moreover, when all other parameters are held equal, raising the nanoparticle volume fraction enhances the average Nusselt number. Increasing the Hartmann number reduces the flow velocity inside the cavity, hence reducing heat transmission. Changes in the cavity's slope and the angle of the applied magnetic field have an effect on the flow and heat transfer as well. Manuscript profile