Space subsystems design: (navigation, control, structure and…)
Introducing the Nonlinear State Control Algorithm of the Air Bearing Laboratory Simulator Based on the Gain Coefficients Dependent on the State Variables

Alireza Ahangarani Farahani; Amirhossain Adami; Hamed Arefkhani

Volume 16, Issue 3 , September 2023, , Pages 79-89

Abstract
  In this article, a new approach has been presented in the design of a satellite's status controller using reaction wheels. First, a non-linear controller whose gains depend on the state variables at any moment is proposed. In the first step, the process of extracting control coefficients using the GA ...  Read More

Space subsystems design: (navigation, control, structure and…)
Implementation and Comparison of Attitude Estimation Algorithms Using Low-Cost Sensors

M. Navabi; M. Salehi

Volume 16, Issue 2 , June 2023, , Pages 63-77

Abstract
  In a flying system, attitude control is one of the essential subsystems. In this subsystem, estimating the current state is very important to control the state, which is achieved by considering the attitude sensors. Comprehensive research is being done today to reduce the cost of Attitude sensors in ...  Read More

Remote sensing
High Precision Remote Sensing Payload Alignment Procedure Using Theodolite and Alignment Cube

Javad Haghshenas; Reza Sharifi Hafshejani

Volume 16, Issue 1 , March 2023, , Pages 1-9

Abstract
  In this paper, a step-by-step laboratory procedure for performing a satellite's payload’s alignment measurement is presented. Four highly accurate theodolites are used along with two or more alignment corner cube to accurately extract the final attitude. Theodolites are arranged around the satellite ...  Read More

Space systems design (spacecraft, satellites, space stations and their equipment)
Design, Construction and Performance Evaluation of a Cold Gas Thruster Test Stand

َAlireza Alikhani; Mohammad Reza Salimi

Volume 15, English Special Issue , May 2022, , Pages 55-64

Abstract
  The cold gas thruster is one of the significant components of a satellite and its application possesses a marked impact on the entire system performance. The nonlinear function and order of magnitude, lead to increasing the importance of thruster function. Therefore, pre-mission performance assessment ...  Read More