Amirreza Kosari; Elahe Khatoonabadi; Aida Kazemi; reza amjadifard; Vahid Bohlouri
Abstract
This paper investigates solar activities and its phenomena from the perspective of risks on the functioning of urban infrastructures, industrial systems and economic structure affected by such phenomena. Also, according to the existing analyzes and results, the basic requirements to prevent the severity ...
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This paper investigates solar activities and its phenomena from the perspective of risks on the functioning of urban infrastructures, industrial systems and economic structure affected by such phenomena. Also, according to the existing analyzes and results, the basic requirements to prevent the severity of the resulting injuries have been introduced. Space weather events can cause disruptions in the power grid, telecommunications and radio communications, airlines, railways, and in addition cause damage to pipelines, oil and mining industry, and aviation each of these cases it is examined as an economic infrastructure in this paper. Also, the effect of these phenomena in damage and dysfunction in satellites that are used for global positioning, telecommunications and weather forecasting has been investigated. Considering the importance of the items mentioned in this article, an attempt has been made to investigate the research done in some other countries regarding the impact of space weather phenomena on socio-economic systems and to study the disruptions and failures caused by this impacts in the industries and socio-economic infrastructures of the society. This studies can help in the formation of the necessary fields and preventive actions in facing the dangers of space weather in order to lead the scientific community to investigate similar cases in the country in order to create management arrangements and related technological
dynamics
Hossein Maghsoudi Dehaghani; Amirreza Kosari; Mahdi Fakoor; Masoud Khoshsima
Abstract
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 ...
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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 longevity and operation of a satellite in this orbit. A satellite in earth orbit is always exposed to various environmental disturbances such as earth gravity gradient force، gravity of the moon and sun، solar radiation pressure، and so on. For this reason، it is constantly deviating from its original path and needs to study the effect of environmental disturbances on the orbital elements in order to properly correct the disturbed orbital parameters. To achieve the above goals، in this paper، we try to investigate the effect of the environmental perturbations on the orbital characteristics by simulating the satellite translational dynamic behavior in the presence of environmental disturbances. Then، utilizing the genetic algorithm and fuzzy logic approach، an attempt was made to modify the compensation logic of the orbital elements correction، so that، the satellite may be forced to remain in its limited operational orbital window during the mission lifetime. The proposed method could improve the problem-solving operational effectiveness to maintain the position of the satellite with the criterion of minimizing fuel consumption. The case study simulation results may indicate the capability of the proposed approach in satisfying the performance requirements of the satellite station-keeping maneuver
