طراحي و پياده سازي كنترل مقاوم اجماع چندين ماهواره بر اساس مشاهده‌گر اغتشاش

Design an‎d implementation robust consensus control of Multiple Spacecraft based on disturbance observer

مهندسي هوافضا

Increasing the robustness an‎d accuracy of the system, the high system flexibility, costs reduction such as construction an‎d design, an‎d the success rate in carrying out missions when using several smaller spacecraft instead of one larger spacecraft have led to a wide range of space missions in the form of formation fly be done. It is very important to control the flight arrangement of spacecraft that perform coordinated maneuvers. In this research, the longitudinal an‎d attitude position control of the spacecraft formation fly has been discussed in the form of leader-follower. To carry out a single mission by a set of spacecraft, it is necessary to consensus of some common characteristics such as: speed, position, attitude, etc. between the spacecraft. In this research, using the consensus algorithm, the state information of all spacecraft finally converges towards the state of the leader spacecraft. Also, in order to remove disturbances an‎d uncertainties in modeling an‎d improve the performance of the control system, a disturbance observer is used, which estimates the external disturbance using the measured parameters, an‎d by feeding it back to the control system, it weakens the disturbance entering the system. The disturbance observer is designed to estimate delay, failure an‎d actuator saturation in addition to external disturbance an‎d system uncertainties. In the end, the designed controller has been implemented on the spacecraft simulator, in such a way that the only attitude control is hardware in the loop an‎d the longitudinal position is calculated by software, an‎d the results of practical tests with Numerical simulations are compared.

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