Original Article Structure
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

Original Article 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

selected article control
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

selected article 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

Original Article dynamics
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

Original Article Propulsion
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

Original Article control
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

Original Article 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

Original Article Propulsion
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

Original Article control
Potential Failure Modes and Effects Analysis in the Reaction Wheel Actuator and Operational Elimination of their Effects

Morteza Farhid; Hossein Beheshti; Masoud Abbaspour; Mohammad Aslanimanesh

Volume 1, Issue 2 , March 2022, Pages 112-125


  In this paper, the results of the process of analyzing potential failure situations on the operational product of the reaction wheel condition control operator are discussed and the effects of the identified failure situations are eliminated or reduced. The technique of analyzing failure modes and their ...  Read More

Original Article Propulsion
Experimental Investigation of the Performance of a Monopropellant Hydrazine Thruster in Atmospheric Conditions

mohamad ali amirifar; alireza rajabi; nooredin ghadiri masoom; zahra amirsardari; majid kamranifar

Volume 1, Issue 2 , March 2022, Pages 126-137


  In this research, the performance of a monopropellant hydrazine thruster in atmospheric conditions has been investigated experimentally. For this purpose, after designing and constructing the thruster according to the functional requirements of the thruster, a test was designed and after that, the desired ...  Read More

selected article Mission Analysis
Investigating Orbital Configurations for a LEO Satellite Telephony Constellation over the Territory of Iran

Mohammad Haji Jafari; Sahar Aminabadi

Volume 1, Issue 2 , March 2022, Pages 138-146


  In this paper, we investigate the orbital characteristics of a constellation consisting of 24 LEO satellites. All the configurations are based on the Walker Delta model, which include single- regulated (one constellation) and double- regulated (intertwined two constellations) models. For the sake of ...  Read More

Original Article control
Time-optimal Control of Spacecraft Rotational and Translational Dynamics in Orbital Rendezvous Maneuver

Sayyed Mohammad Mousavi; Sayyed Majid Esmailifar; Mohammad Chiniforoushan

Volume 1, Issue 2 , March 2022, Pages 147-166


  In this research, the time-optimal 6 degrees of freedom (6DOF) orbital rendezvous maneuver problem for an inertially asymmetric rigid spacecraft with independent attitude and position control actuators has been investigated. It is also assumed that the spacecraft is equipped with the thruster actuators ...  Read More

Original Article Propulsion
Experimental Study of Pre-evacuation Effect on Second throat Diffuser Starting Process

Nematollah Fouladi; sina afkhami; Mahmood PasandidehFard

Volume 1, Issue 2 , March 2022, Pages 167-179


  In the present study, the effect of pre- evacuation on starting process of a second throat exhaust diffuser has been investigated experimentally by examining a thrust optimized parabolic nozzle. An experimental setup called high- altitude test facility has been used with compressed air as operating fluid. ...  Read More