1. 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

http://dx.doi.org/10.22034/jssta.2022.294770.1026

Abstract
  Properties of brazed joints could be affected by some factors like 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

2. 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

http://dx.doi.org/10.22034/jssta.2022.295493.1028

Abstract
  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

3. Designing Active Fault-tolerant Controller for Spacecraft Under Actuator Fault

Rouzbeh Moradi

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

http://dx.doi.org/10.22034/jssta.2022.305782.1032

Abstract
  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 control subsystems (sensor-actuator-system). Direct access to spacecraft is not always possible, therefore fault-tolerant control has become even ...  Read More

4. 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

http://dx.doi.org/10.22034/jssta.2022.309735.1034

Abstract
  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

5. Improving the Method of Satellite Station Keeping in Geosynchronous Orbit with Considerations of fuel Consumption Restrictions

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

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

http://dx.doi.org/10.22034/jssta.2022.327321.1056

Abstract
  Due to the unique characteristics of the geo-synchronous 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

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

ALI RASTGAR

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

http://dx.doi.org/10.22034/jssta.2022.312087.1036

Abstract
  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, fabricated. Operational characteristics including discharge coefficient and breakup length ...  Read More

7. Experimental Attitude Estimation Using Real-time Magnetometer Calibrated Data

Amir Labibian; Zeinab Talebi; Hossein Salimi

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

http://dx.doi.org/10.22034/jssta.2022.317822.1040

Abstract
  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. Consequently, ...  Read More

8. Investigation of nanoparticle effects on rheology of particulate filled suspensions

Majid Haghgoo; Ahmad Ramezani Saadat Abadi

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

http://dx.doi.org/10.22034/jssta.2022.319488.1041

Abstract
  Achieving a flawless solid composite propellant requires proper processability of its corresponding filled polymer slurry. In other words, the optimal rheological properties of highly filled suspensions after mixing process, ensure its transfer to the mold and complete filling of complex geometries. ...  Read More

9. 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

http://dx.doi.org/10.22034/jssta.2022.323058.1044

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

10. 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

http://dx.doi.org/10.22034/jssta.2022.323452.1046

Abstract
  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

11. 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

http://dx.doi.org/10.22034/jssta.2022.325135.1047

Abstract
  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

12. 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

http://dx.doi.org/10.22034/jssta.2022.310259.1035

Abstract
  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 comparability, ...  Read More

13. 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

http://dx.doi.org/10.22034/jssta.2022.315191.1038

Abstract
  This paper studies 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. It is assumed that the spacecraft equipped with the thruster actuators and the control forces and ...  Read More

14. Experimental Study of the pre-evacuation effect on second throat diffuser Starting process

Nematollah Fouladi; sina afkhami; Mahmood PasandidehFard

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

http://dx.doi.org/10.22034/jssta.2022.326454.1049

Abstract
  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

1. Investigation of Physical and Electrochemical Properties of Separator Used in High Drain Lithium-ion Battery

Ashkan Nahvibayani; Shaghayegh Baktashian; Mohsen Babaiee; Rahim Eqra

Articles in Press, Accepted Manuscript, Available Online from 16 March 2022

http://dx.doi.org/10.22034/jssta.2022.327568.1061

Abstract
  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

2. 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

Articles in Press, Accepted Manuscript, Available Online from 16 March 2022

http://dx.doi.org/10.22034/jssta.2022.328818.1077

Abstract
  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

Material science
3. 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

Articles in Press, Accepted Manuscript, Available Online from 15 May 2022

http://dx.doi.org/10.22034/jssta.2022.327760.1065

Abstract
  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