P. Hajipour, Leila Mohammadi, A. Eidi, S. Shoorian, Nahid Eidi esfiani, S. Feghhi
{"title":"Using Space Radiation Shielding Made of Polyethylene instead of Aluminum in GEO Orbit in order to Reduce Weight","authors":"P. Hajipour, Leila Mohammadi, A. Eidi, S. Shoorian, Nahid Eidi esfiani, S. Feghhi","doi":"10.30699/jsst.2023.1411","DOIUrl":"https://doi.org/10.30699/jsst.2023.1411","url":null,"abstract":"","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"87 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a robust adaptive hybrid control approach based on a combination of super-twisting (ST) and non-singular terminal sliding mode control (STNSMC) approaches for vibration and attitude control of a flexible spacecraft with fully coupled rigid-flexible dynamic is developed. The proposed adaptation law eliminates the need for bounds knowledge of external disturbances and uncertainties. Then an ST-based non-singular terminal SMC generates a continuous control signal to reject the Chattering phenomenon, the non-singular terminal switching control law with the ability to generate continuous control commands to eliminate the chattering phenomenon. Moreover, finite-time convergence is achieved, and the singularity problem has been avoided. Despite the uncertainties effects, rigid-flexible coupling dynamics, and external disturbances, the proposed control law ensures high-precision motion of the spacecraft states on the sliding surface in a finite time. The overall stability of the system has been demonstrated using the Lyapunov theory. One of the essential features of the proposed control algorithm is to prevent overestimation of control gains and faster convergence rates comparing to conventional ST and non-singular terminal SMC approaches. The simulations in the form of a comparative study for large-angle maneuver reveal the advantage of the proposed controller in terms of system high-frequency modes excitation, accuracy, convergence rate, chattering, and control effort.
本文开发了一种基于超扭曲（ST）和非矢量终端滑模控制（STNSMC）相结合的鲁棒自适应混合控制方法，用于具有完全刚柔耦合动态的柔性航天器的振动和姿态控制。所提出的适应法则无需外部干扰和不确定性的约束知识。然后，基于 ST 的非矢量终端 SMC 生成连续的控制信号来抑制颤振现象，非矢量终端开关控制法则具有生成连续控制指令来消除颤振现象的能力。此外，还实现了有限时间收敛，避免了奇异性问题。尽管存在不确定性效应、刚柔耦合动力学和外部干扰，所提出的控制法则仍能确保航天器状态在有限时间内在滑动面上实现高精度运动。利用 Lyapunov 理论证明了系统的整体稳定性。与传统的 ST 和非矢量终端 SMC 方法相比，所提控制算法的基本特征之一是防止高估控制增益和更快的收敛速度。通过对大角度机动的比较研究进行模拟，发现所提出的控制器在系统高频模式激励、精度、收敛速度、颤振和控制努力等方面都具有优势。
{"title":"Attitude and Vibration Control of a Flexible Spacecraft using Hybrid Adaptive Super-Twisting Non-singular Terminal Sliding Mode Control","authors":"Valiollah Shahbahrami, M. Azimi, Alireza Alikhani","doi":"10.30699/jsst.2023.1365","DOIUrl":"https://doi.org/10.30699/jsst.2023.1365","url":null,"abstract":"In this paper, a robust adaptive hybrid control approach based on a combination of super-twisting (ST) and non-singular terminal sliding mode control (STNSMC) approaches for vibration and attitude control of a flexible spacecraft with fully coupled rigid-flexible dynamic is developed. The proposed adaptation law eliminates the need for bounds knowledge of external disturbances and uncertainties. Then an ST-based non-singular terminal SMC generates a continuous control signal to reject the Chattering phenomenon, the non-singular terminal switching control law with the ability to generate continuous control commands to eliminate the chattering phenomenon. Moreover, finite-time convergence is achieved, and the singularity problem has been avoided. Despite the uncertainties effects, rigid-flexible coupling dynamics, and external disturbances, the proposed control law ensures high-precision motion of the spacecraft states on the sliding surface in a finite time. The overall stability of the system has been demonstrated using the Lyapunov theory. One of the essential features of the proposed control algorithm is to prevent overestimation of control gains and faster convergence rates comparing to conventional ST and non-singular terminal SMC approaches. The simulations in the form of a comparative study for large-angle maneuver reveal the advantage of the proposed controller in terms of system high-frequency modes excitation, accuracy, convergence rate, chattering, and control effort.","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"2 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138944055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents analysis and improvements on a star identification algorithm based on singular value decomposition . To improve the identification results, modifications have been made to the algorithm. Moreover, analysis and simulation are presented to investigate the effect of field of view dimensions and the number of stars used on the identification results, and the rate of duplicate sets in the database. In addition, identification has been considered a two-step process based on singular values and vectors. The results show the superiority of the improved algorithm in increasing the identification rate and reducing the rate of duplicate sets in the database. The identification rate of the improved algorithm in 𝟏𝟎 ° × 𝟏𝟎 ° and 𝟏𝟐 ° × 𝟏𝟐 ° fields of view dimension is always more the %97.
{"title":"Analysis and improvement of star identification algorithm based on singular value decomposition for star sensor","authors":"Mona Zahednamazi, Alireza Toloui","doi":"10.30699/jsst.2023.1445","DOIUrl":"https://doi.org/10.30699/jsst.2023.1445","url":null,"abstract":"This paper presents analysis and improvements on a star identification algorithm based on singular value decomposition . To improve the identification results, modifications have been made to the algorithm. Moreover, analysis and simulation are presented to investigate the effect of field of view dimensions and the number of stars used on the identification results, and the rate of duplicate sets in the database. In addition, identification has been considered a two-step process based on singular values and vectors. The results show the superiority of the improved algorithm in increasing the identification rate and reducing the rate of duplicate sets in the database. The identification rate of the improved algorithm in 𝟏𝟎 ° × 𝟏𝟎 ° and 𝟏𝟐 ° × 𝟏𝟐 ° fields of view dimension is always more the %97.","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"10 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138944799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammad Haji Jafari, Afshin ValiMohammad, Mahsa Mahdavi
In this research
在这项研究中
{"title":"Structural Design Modification of a CubeSat Regarding Modal Compatibility for Launching by Vega C Launcher","authors":"Mohammad Haji Jafari, Afshin ValiMohammad, Mahsa Mahdavi","doi":"10.30699/jsst.2023.1439","DOIUrl":"https://doi.org/10.30699/jsst.2023.1439","url":null,"abstract":"In this research","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"21 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138947148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Extreme temperature fluctuations in space, especially on the moon and Mars, are one of the most important challenges for space scientists to transfer plant seeds and grow them in outer space outside the atmosphere. The present research studied the effects of simulated space temperature fluctuations on the quantitative and qualitative content of dry tomato seed proteins. The results showed a double or more significant decrease in the intensity of protein bands with high molecular weight in the treated group compared to the control. The two-dimensional electrophoresis technique followed by mass spectrometry is suggested for the identification of unknown protein bands in future studies.
{"title":"The effect of extreme temperature fluctuations simulated of space on the electrophoretic profile of tomato (Lycopersicum esculentum Mill.) seed storage proteins","authors":"Fateme Mousavi","doi":"10.30699/jsst.2023.1433","DOIUrl":"https://doi.org/10.30699/jsst.2023.1433","url":null,"abstract":"Extreme temperature fluctuations in space, especially on the moon and Mars, are one of the most important challenges for space scientists to transfer plant seeds and grow them in outer space outside the atmosphere. The present research studied the effects of simulated space temperature fluctuations on the quantitative and qualitative content of dry tomato seed proteins. The results showed a double or more significant decrease in the intensity of protein bands with high molecular weight in the treated group compared to the control. The two-dimensional electrophoresis technique followed by mass spectrometry is suggested for the identification of unknown protein bands in future studies.","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"9 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138944070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design, Simulation, Fabrication and Determining the equivalent circuit Model of a Reconfigurable FSS unit cell filter for electromagnetic protection of space payload systems","authors":"Seyyed Amir Gohari, Hamed Babaei, Peiman Mohamadi","doi":"10.30699/jsst.2023.1448","DOIUrl":"https://doi.org/10.30699/jsst.2023.1448","url":null,"abstract":",","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"29 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138947277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-22DOI: 10.30699/jsst.2023.389165.1435
Leila Mohammadi, Parvin Sojoodi, Mohammad Bod, saeed sheikhzadeh
necessity of using satellite communications in the development of the national information network will be clearly defined.
将明确界定在发展国家信息网络中使用卫星通信的必要性。
{"title":"Gap Analysis in satellite communication services","authors":"Leila Mohammadi, Parvin Sojoodi, Mohammad Bod, saeed sheikhzadeh","doi":"10.30699/jsst.2023.389165.1435","DOIUrl":"https://doi.org/10.30699/jsst.2023.389165.1435","url":null,"abstract":"necessity of using satellite communications in the development of the national information network will be clearly defined.","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"12 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138947292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Improving INS/GPS Loosely fusion, during Spoofing, using steady-state Kalman matrix gain","authors":"Reza Ghasrizadeh, A. Nikkhah","doi":"10.30699/jsst.2023.1425","DOIUrl":"https://doi.org/10.30699/jsst.2023.1425","url":null,"abstract":"","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"2016 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139336882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Introducing the nonlinear state control algorithm of the air bearing laboratory simulator based on the gain coefficients dependent on the state variables","authors":"Alireza Ahangarani Farahani, Amirhossain Adami, Hamed Arefkhani","doi":"10.30699/jsst.2023.1437","DOIUrl":"https://doi.org/10.30699/jsst.2023.1437","url":null,"abstract":",","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139336947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roghayeh Doost, Saber Shahidzadseh, Roghieh Karimzadeh Baee, P. Hajipour
Due to the frequency sharing of Aeronautical-ESIM (A-ESIM) satellite broadband service with previous ones
由于航空-ESIM（A-ESIM）卫星宽带服务与以前的卫星宽带服务共享频率
{"title":"Determining Allowed Positions of Aeronautical-Earth Station in Motion (A-ESIM) Prevent its Frequency Interference in the Fixed Ground Station","authors":"Roghayeh Doost, Saber Shahidzadseh, Roghieh Karimzadeh Baee, P. Hajipour","doi":"10.30699/jsst.2023.1410","DOIUrl":"https://doi.org/10.30699/jsst.2023.1410","url":null,"abstract":"Due to the frequency sharing of Aeronautical-ESIM (A-ESIM) satellite broadband service with previous ones","PeriodicalId":272394,"journal":{"name":"Journal of Space Science and Technology","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139349398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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