Space subsystems design: (navigation, control, structure and…)
Attitude and Vibration Control of a Flexible Spacecraft Using Hybrid Adaptive Super-Twisting Non-Singular Terminal Sliding Mode Control

Valiollah Shahbahrami; Milad َAzimi; َAlireza Alikhani

Volume 16, Issue 4 , December 2023, , Pages 1-13

Abstract
  In this paper, a robust adaptive hybrid control approach based on a combination of super-twisting and non-singular terminal sliding mode control (STNSMC) approaches for vibration and attitude control of a flexible spacecraft with fully coupled dynamic is developed. The proposed adaptation law eliminates ...  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

Thermal Optimum Trajectory Design of Manned Reentry Vehicles using the Aerodynamic Database Management Method

Seyed Moein Mahmoodzadeh Entezari; Alireza Alikhani; Meysam Mohammadi Amin

Volume 13, Issue 2 , June 2020, , Pages 51-61

Abstract
  In this study, a method for designing a thermal optimum reentry path based on aerodynamic database management has been developed using the Kriging and Co-Kriging methods. For the design of the reentry path in the conceptual design phase, the more precise the dynamical model of the reentry vehicle, the ...  Read More

Dynamic Terminal Sliding Mode Control for an Aerospace Launch Vehicle

Ali Reza Alikhani; Seyed Aliakbar Kasaeian

Volume 8, Issue 4 , January 2016, , Pages 1-7

Abstract
  Tracking guidance commands for a time-varying aerospace launch vehicle during the atmospheric flight is considered in this paper. Hence, the dynamic terminal sliding mode control law is constructed for this purpose and dynamic sliding mode control is utilized. The terminal sliding manifold causes the ...  Read More

Guidance and Control for Space Capsule in the Presence of Uncertain Dynamic Parameters during the Atmospheric Entry Phase

Ali Reza Alikhani; Yosef Shamadi

Volume 8, Issue 3 , October 2015, , Pages 1-13

Abstract
  Important issues in designing a controller for re-entry vehicles is environmental uncertainties such as rapid changes in atmospheric properties which is an explicit function of altitude and also uncertainties of itselfvehicle such as aerodynamic coefficient, moment of inertia and so on. This paper deals ...  Read More

Optimal Control of a Flexible Spacecraft in a Proximity Operation Using State Dependent Riccati Equation Approach

Mohammad Reza Mortazavi; Ali Reza Alikhani

Volume 8, Issue 1 , April 2015, , Pages 27-41

Abstract
  This paper presents a suitable technique for nonlinear control of a flexible spacecraft in proximity operations. To do proximity operations well, the pursuer spacecraft must place itself in a pre specified location relative to target and align its docking port to target’s docking port while keeping ...  Read More