L1 Adaptive Control Design for a Space System Considering Actuators Delay

In this paper, dynamic equations of a satellite attitude are simulated. Three fluid momentum actuators are used to control Euler angles and their dynamic is considered in satellite attitude equations as well. L1 adaptive control is utilized for three-axial stabilization of satellite. Robustness assurance in presence of fast adaptation is substantial characteristic of L1 adaptive control structure. The main achievement of this controller is that the error norm is proportional with square root inverse of adaptation gains. Therefore, large values of gains would have advantages. L1 adaptive control is designed based on simplified attitude dynamic equations without satellite coupling effects, and then it is placed on coupled nonlinear equations. In next case, the impact of available delay on fluid momentum actuators is investigated. Simulation results present that the system remains stable with the assumption of actuators time delay, but it experiences some oscillations in Euler angles, input controls and angular velocities. For solving this problem, an observer with high speed of estimation is used. Finally, it is recognized that the available oscillations are reduced even with increasing the actuators time delay, and the performance of control system became more desirable.
 

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L1 Adaptive Control Design for a Space System Considering Actuators Delay

  • تولید کننده: مارکت کد
  • شناسنامه: L1 Adaptive Control Design for a Space System Considering Actuat
  • موجودی: در انبار
  • تاریخ چاپ: 2016-11-07
  • لینک دانلود
  • نویسنده: H. Moradi-Maryamnegari
  • رایگان

برچسب ها: AS41029