Control dynamics
Experimental Identification of Satellite Antenna Dynamics

Ehsan Maani miandoab; Ehsan Zabihian; Hossein Najafi

Volume 1, Issue 1 , September 2021, , Pages 1-12

  In all types of satellites, communication systems are utilized for data transmission between satellite and ground stations. pointing the communication antennas to the ground is necessary for the correct mission transmission information. The vibration of the satellite antenna leads to deforming antenna ...  Read More

Effect of Brazing Temperature on the Microstructure and Mechanical Properties of Stainless Steel 316 Joint Brazed by BNi2

Yaser Vahidshad; Faegheh Soltanmohammad

Volume 1, Issue 2 , March 2022, , Pages 1-9

  Many factors affect the quality of brazing process, including temperature, time, clearance, surface roughness and alloy elements. Actually, they influence on the formation of intermetallic compounds in brazed joints. Since intermetallic compounds are brittle, they considerably degrade the mechanical ...  Read More

Multidisciplinary Design Sensitivity Analysis of a Spacecraft Monopropellant Propulsion system by Latin Hypercube Sampling (LHS)

Mohammad Hossein mansouri Moghari; Hassan Naseh; Sahar Noori

Volume 2, Issue 2 , February 2023, , Pages 1-21

  Accurate solving of complex systems such as spacecraft is very costly and time consuming. By building a surrogate model, the solution time and the cost can be reduced. The closer the surrogate model is to the actual model, the more accurate the solution and the lower the error rate. High-precision successor ...  Read More

Remote Sensing
Improvement the Leaf Water Content Inventory Model Based on the Hyper Spectral Data

Tayebe Managhebi; Mohammadreza Mobasheri

Volume 1, Issue 2 , March 2022, , Pages 10-21

  The leaf water content is a specific index for the assessment of the physiological status of the plant based on the water content of the vegetation. This research provides an appropriate model based on the reflectance spectra between 400 and 2500 nm to estimate the leaf water content. We examined 53 ...  Read More

Power Electronics
Lifetime Improvement Using Task Scheduling in Hard Real-Time Systems Equipped with Environmental Energy Harvester and Hybrid Energy Storage

Mahmoud Hasanloo; Mahdi Kargahi; Shahrokh Jalilian

Volume 1, Issue 1 , September 2021, , Pages 13-24

  In this paper, we investigate the effect of task scheduling on the lifetime of a real- time hard drive system that uses a composite energy tank consisting of a battery, a super capacitor, and a solar energy picker to power supply itself. The lifetime of a system in this document is the moment the system ...  Read More

Heat control
Analysis and Simulation of Space Environment Static Charge Effects on Satellite Surfaces and Multi-Layer Insulation

Mehrnoosh Farahani; Vafa Sedghi; seyed mostafa safavi homami; Hamid Mesforoush

Volume 2, Issue 2 , February 2023, , Pages 22-36

  The ions in the space environment cause the surface and internal charging phenomenon in satellites. The accumulated potential during the charging phenomenon can cause electrostatic discharge and  expose the satellite telecommunication components such as antennas and electronic circuits to serious ...  Read More

Designing Active Fault- tolerant Controller for Spacecraft under Actuator Fault

Rouzbeh Moradi

Volume 1, Issue 2 , March 2022, , Pages 22-33

  Fault- tolerant control is one of the important issues in automatic control. The reason for this importance is the probability of fault/ failure occurrence in controlling subsystems (sensor-actuator-system). Direct access to spacecraft is not always possible, Therefore fault- tolerant control has become ...  Read More

Effect of Plasma Nitriding Treatment on the Chromium Layer Applied on Space Structure to Avoid Cold Weld

Arvin Taghizadeh Tabrizi; Hossein Aghajani; Farhad Farhang Laleh

Volume 1, Issue 1 , September 2021, , Pages 25-35

  Although regarding low density and high ratio of strength to weight of titanium, the application of this metal is restricted in space industry due to its low surface properties including low wear resistance which could lead to the cold weld. For improving this property of titanium, applying protective ...  Read More

Simulation of Hollow Cathode in the Hall Thruster by Particle in Cell (PIC) Method

masumeh kiantaj; morteza farhid; mohammadmehdi shafie; Mohammad reza morad

Volume 2, Issue 2 , February 2023, , Pages 37-47

  The this article the characteristics of the hollow cathode plasma particles in the spt-100 hall effect thruster have been investigated by two-dimensional particle-in-cell simulation. One of the main and important components of the hall thruster is hollow cathode which plays two important tasks: one part ...  Read More

space climate
Toward the Establishment of a National Center for Space Weather Services: Vision, Mission and Organization

Omid Shekoofa; Masoud Khoshsima; Sajad Ghazanfarinia; Farhad Bagheroskouei

Volume 1, Issue 2 , March 2022, , Pages 34-48

  This article discusses the need for research, monitoring and forecasting services related to space weather events and the establishment of a national center to achieve these goals. It starts with an introduction to the growing dependence of human civilization on advanced technologies, including space ...  Read More

System Design of Resistojet Thruster for Space Application

seyed alireza Jalali chimeh; Ali Madadi; seyed mostafa safavi homami; javad Emami

Volume 1, Issue 1 , September 2021, , Pages 36-52

  In complicated systems such as satellites, each subsystem's design can affect the design of the overall system. In the design procedure, the effect of each technology on the other components should be determined. Because of increasing in space trash, the propulsion subsystems are introduced to avoid ...  Read More

Design of a Low Earth Orbit Constellation for Regional Navigation Mission

Sajjad Ghazanfarinia; Ehsan Mousivand; Masoud Khoshsima; Yaser Saffar

Volume 2, Issue 2 , February 2023, , Pages 48-59

  This research is going to present design of a LEO Constellation for Navigation service with minimum number of Satellites. The goal is to achieve Dilution Of Precision (DOP) less than 6. This Requirement is going to be achieved using predefined launch vehicles limitation on orbit which is 500 km in circular ...  Read More

Improving the Method of Satellite Station Keeping in Geostationary Orbit with Considerations of fuel Consumption Restrictions

Hossein Maghsoudi Dehaghani; Amirreza Kosari; Mahdi Fakoor; Masoud Khoshsima

Volume 1, Issue 2 , March 2022, , Pages 49-65

  Due to the unique characteristics of the geostationary orbit and the importance of establishing a satellite in this flying corridor، it is necessary to investigate the effect of environmental disturbances on the orbital elements and to maintain the satellite orbital elements in order to increase the ...  Read More

Flight dynamics
Imaged Based Earth Horizon Sensor with no Altitude Information

Behrooz Raeisy; Fatemeh Ghofrani

Volume 1, Issue 1 , September 2021, , Pages 53-64

  Various sensors can be used to attitude determination of a satellite, including the Earth Horizon Sensor. These sensors generally divided into two types: static and scanning types. In the static type, two- dimensional array or several linear arrays capture instantly the Earth image information to attitude ...  Read More

Experimental and Numerical Analysis of the Effect of Filament Curvature Pattern on the Internal Hydrostatic Threshold of GFRP Composite Cylinder Made by Filament Winding Process

Alireza Zarezadeh; Mohammad Hossein Allaee; Mohsen Heydari Beni; Ali Davar; Jafar Eskandari Jam

Volume 2, Issue 2 , February 2023, , Pages 60-77

  The filament winding process is one of the most important and widely used processes in the manufacture of composite structures in order to achieve high strength and rigidity. In this process, there are important parameters such as fiber tension, how the fibers are twisted, the effect of layering, twisting ...  Read More

Optimum Design of a Microsatellite Structure with Vibration Constraint

mohamad bagher bahrami

Volume 1, Issue 1 , September 2021, , Pages 65-80

  One of the most critical design points in satellites is to achieve the minimum mass (weight) by meeting all the requirements and constraints (strength, location and vibration). In this regard, the structure can play a very important role because the structural designer has more freedom of action in determining ...  Read More

Experimental Study of Spray Merge in Dual Pressure- Swirl Coaxial Injectors

ALI RASTGAR; Hojat Ghasemi

Volume 1, Issue 2 , March 2022, , Pages 66-77

  The purpose of this paper is to present experimental data for merging two outlet fluid skirts in a dual pressure- swirl coaxial injector. In this study, a dual pressure- swirl external mixing injector was designed and fabricated. Operational characteristics including discharge coefficient and breakup ...  Read More

Numerical Evaluation of a Test Bed of an Orbital Transmission Engine in an Initial Vacuum Condition

Nematollah Fouladi; Alireza Mohammadi

Volume 2, Issue 2 , February 2023, , Pages 78-91

  The purpose of this research is to evaluate a ground test bed of an orbital transmission engine with pre-evacuation of the engine's internal space. In the usual tests on the ground, the initial pressure of the engine is atmospheric pressure. While during the orbital mission, the internal space of the ...  Read More

Experimental Attitude Estimation Using Real-time Magnetometer Calibrated Data

Zeinab Talebi; Amir Labibian; Hossein Salimi

Volume 1, Issue 2 , March 2022, , Pages 78-87

  Magnetometer is one of the main sensors in Attitude Determination and Control Subsystem (ADCS) of Low Earth Orbit (LEO) satellites and since it is operable in all times during an orbital period, it can be utilized in almost all functional modes like detumbling, nadir pointing and orbit transfer. Therefore, ...  Read More

Investigating the Effect of Equiaxed and Lamellar Microstructure on Critical Damage of Ti-6Al-4V in Isothermal Compression of Grooved Double-Cone Specimens

S. Javid Mirahmadi; Mohsen Hamedi; Maedeh sadat Zoei

Volume 1, Issue 1 , September 2021, , Pages 81-91

  Ti-6Al-4V is one of the most common materials in the aerospace industry. For example, satellite fuel tanks are made of this alloy. Among manufacturing processes, forming processes is one of the most widely used areas in the manufacture of Ti-6Al-4V components. Due to the importance of determining the ...  Read More

Computing the Installation Error between Star Tracker and Fiber Optic Gyroscope

Elham Kowsari; Hadi Makarem

Volume 2, Issue 2 , February 2023, , Pages 92-102

  Star tracker is one of the most important devices used on satellites for attitude determination. Since its output is discontinuous, it needs a complementary unit to cover its discontinuities. Using gyroscope unit is the most suitable choice for aiding the star tracker. However, using these two kinds ...  Read More

Material science
Investigation of the Use of Modified Molybdenum Disulfide Nanostrucutres in the Rheological Behavior of Microparticulate Filled Suspensions

Majid Haghgoo; Ahmad Ramezani Saadat Abadi

Volume 1, Issue 2 , March 2022, , Pages 88-96

  Achieving a flawless solid composite propellant requires proper processability of its corresponding filled polymer slurry. In other words, a highly filled suspension with optimal rheological properties makes it possible to transfer to the mold and complete filling in complex geometries. In this dynamic ...  Read More

Lifetime Enhancement of Embedded Systems During Task Scheduling Through a Multi-Objective Particle Swarm Optimization Approach

Athena Abdi; shahrokh jalilian

Volume 1, Issue 1 , September 2021, , Pages 92-107

  In this paper, a task scheduling and mapping method based on multi-objective particle swarm optimization (MOPSO) algorithm is presented to improve lifetime reliability of multiprocessors systems on chip. This method considers power consumption temperature and performance along with the lifetime reliability ...  Read More

Material science
Thermal Conductivity Enhancement of Epoxy Adhesives Using Boron Nitride and Alumina Ceramic Fillers

Sajede Aghasi; Seyed Hassan Jafari; Mahdi Golriz

Volume 2, Issue 2 , February 2023, , Pages 103-114

  One of the methods for improving thermal conductivity of epoxy adhesives is the incorporation of conductive ceramic, metal or carbon fillers. As the main goal of this research is to improve the thermal conductivity of epoxy resin and keep its electrical insulating property, the effect of Alumina (Al2O3) ...  Read More

Design and Analysis of Pressure- Swirl Fuel Injector with Full- Cone Spray for Catalytic Thruster

Hadiseh Karimaei

Volume 1, Issue 2 , March 2022, , Pages 97-111

  The monopropellant thrusters of the situation control system are a requirement for the development and application of satellites and space capsules in space, which are high-tech and expensive. In this paper, the design and simulation of a pressure- swirl injector with full-cone spray as a fuel injector ...  Read More