Original Article
Impact investigation between two unmanned satellites during Central Docking process

mohammadreza alijani nargesi; hasan haddadpour; Saeed Shakhesi

Volume 2, Issue 1 , September 2022, Pages 1-10


  one of the key issues in the operations of on orbit servicing to unmanned satellites is to provide a safe and reliable docking process. This paper investigates the dynamic behavior of a flexible probe in the central docking mechanism of unmanned satellites. This study tries to optimize the docking process ...  Read More

Original Article
Wideband Microstrip Patch Array Antenna for Synthetic Aperture Radar Applications

Sahar Abdi; Morteza Cheheltanan

Volume 2, Issue 1 , September 2022, Pages 11-22


  A wideband high-gain microstip patch array antenna for high resolution synthetic aperture radar applications is presented. The antenna operation frequency is in the X-band. The antenna structure is a four-layer configuration consisting of radiating patches, slots, coupling cavities, and a corporate feeding ...  Read More

Original Article
Investigation of Physical and Electrochemical Properties of Separator Used in High Drain Lithium-ion Battery

Ashkan Nahvibayani; Shaghayegh Baktashian; Mohsen Babaiee; Rahim Eqra

Volume 2, Issue 1 , September 2022, Pages 23-33


  One of the reasons for the increasing popularity of lithium-ion batteries is the improvement of their rate capability and power density. All components of a battery, including the anode, cathode, electrolyte, and separator, can limit the capability of lithium-ion batteries. While most efforts have focused ...  Read More

Original Article
Numerical Investigation of Coolant Flow Pressure Effect on Water Jacket Design for Large Scale Diffuser at High Heat Fluxes

Nematollah Fouladi; Mohammad Farahani; Milad Mahdian Dowlatabadi

Volume 2, Issue 1 , September 2022, Pages 34-50


  The aim of this study is to evaluate the performance of water-jacket cooling system for thermal protection of an exhaust large dimension diffuser at high heat fluxes in a wide range of coolant pressure. For this purpose, a suitable design algorithm has been developed. Using the present method, the parameters ...  Read More

Original Article
Techniques for controlling the adhesion quality of anodized coatings after heating

Mohamad Reza Nasresfahani; Mohamad Nasresfahani; mojtaba forghani; hossein Nazemi; hadi gorabi

Volume 2, Issue 1 , September 2022, Pages 51-63


  Anodizing is a common method for increasing the adhesion of aluminum surfaces. However, if we heat the manufactured products before adhering due to the hydration of the anodized coating, cracking, and morphological changes, the adhesive capacity will be greatly reduced. As part of the research presented ...  Read More

Original Article
Study the Effect of Acid-heat Pretreatment of Nafion Membrane on the Performance of Multi-cell Stack of Vanadium Redox Flow Battery

Mohammad Zarei-Jelyani; Mohammad Mohsen Loghavi; Mohsen Babaiee; Rahim Eqra; Masood Masoumi

Volume 2, Issue 1 , September 2022, Pages 64-72


  ]n recent years, extensive research has been focused on the key materials of vanadium redox flow batteries (VRFBs) to improve the power and energy density. In a VRFB system, the ion-exchange membrane is an important component, because it is used to separate the positive and negative electrolytes and ...  Read More

Original Article
Aerodynamic Simulation of a Tactical Aerostat and evaluating the longitudinal static coefficients

Ali Jafarian; Saeed Sarkheil; Vahab Haghighat

Volume 2, Issue 1 , September 2022, Pages 73-83


  In this paper, the computational fluid dynamics simulation of a tactical aerostat is conducted and the longitudinal static coefficients of the aerostat is evaluated. The simulation is conducted using the Fluent software and the Spalart-Allmaras turbulent model is used. First, in order to validate the ...  Read More

Original Article
Satellite Attitude Control Design via Tube-based Robust Model Predictive Control based on Reduced Calculation

mahyar madani esfahani; aref aghamolaie; Taleb Abdollahi; Saeed shamaghdari

Volume 2, Issue 1 , September 2022, Pages 84-95


  In this paper, a satellite attitude control system (SACS) based on tube-based robust model predictive control (TMPC) methodology is designed which is robust to disturbances. All Euler angles and their derivatives are ensured not to deviate more than a determined limit under those disturbances with known ...  Read More

Original Article
Study the Performance of Monopropellant Thruster Catalysts with Different Iridium Loading

Nooredin Ghadiri Massoom; alireza rajabi; mohamad ali amirifar; Zahra Amirsardari; Akram Dourani; majid kamranifar

Volume 2, Issue 1 , September 2022, Pages 96-108


  In this paper, the effects of different weight percentage of iridium (Ir) nanoparticles loadings on performance parameters of hydrazine catalyst and monopropellant thruster have been studied. Nanoparticles of iridium with different contents of 10 wt%, 20 wt%, and 30 wt% has been coated on gamma-alumina ...  Read More

Original Article Material science
Effect of process parameters on microstructure and efficiency of tubular alumina catalyst prepared by doped anodizing method with platinum particles

shahab khameneh asl; reza golzarian; behnam salahimehr; ali fardi

Volume 2, Issue 1 , September 2022, Pages 109-117


  Platinum nanoparticles are widely used in the oil and gas industries, electronics, space tools, pharmaceutical industries, biomaterials and etc.Platinum catalysts are more active and selective than the other catalysts. In this regard, the preparation of a suitable alumina catalyst base and more effective ...  Read More

Original Article
Fault tolerant attitude control for a satellite with four reaction wheels

Sevil M. Sadigh; Hossein Behesgti

Volume 2, Issue 1 , September 2022, Pages 118-131


  In this paper, a passive fault tolerant control method is proposed for the satellite attitude tracking in the presence of external disturbances, the inertia matrix uncertainties, and reaction wheel faults. To achieve this goal, a modified fast terminal sliding model approach is used due to its robustness ...  Read More

Original Article
Investigation the effect of the forest height and forest density on the accuracy of forest height estimation methods using PolInSAR data

Tayebe Managhebi; Akram JafarAghaee

Volume 2, Issue 1 , September 2022, Pages 132-147


  Forest biomass is one of the most important parameters in the ecosystem changes assessment and global carbon cycle modelling. In the other hand, the forest height is an effective parameter in the allometric equations which are used for biomass estimation. In this research the effect of two physical factors, ...  Read More

Original Article
Design, and manufacture of digital sun sensor with an optimized slit over the entire field of view

Marzieh Afkhami

Volume 2, Issue 1 , September 2022, Pages 147-153


  One of the key subsystems in satellites is the attitude determination and the sun sensor is one of the most common sensors in this field. Today, due to the increasing development of satellites, the need to increase the accuracy of satellite subsystems seems very necessary. In this paper, the design of ...  Read More