Abstract
The objective of this work is to investigate the effects of laser torque on both passive and active control for LEO CubeSat. The investigation is based on the model of the Euler equations for rotational motion. A simple case of spacecraft attitude control problem is considered, in which passive control is performed by accounting only gravity gradient torque, and then active control technique is implemented using PD control and one momentum wheel. The system simulation is conducted using the package of Matlab 7.10-(R2010a). The simulated results show the effect of applying different magnitudes of ground based laser torque on the system stability for passive and active control. Having applied the ground based laser torque on passive and active control techniques respectively; the obtained results show that the laser torque possesses negative effects on the system performance for the current study. For passive control, the ground based laser torque has a significant effect where the roll and yaw angles' responses are diverged. However, with active control, the effect of laser torque is limited by a proper PD gains tuned.
Highlights
Nowadays, CubeSats become the most popular spacecrafts due to their physical size and weight
The responses of the roll and yaw angles using different magnitude of laser torque using Proportional Derivative (PD) controller were illustrated in figure 6
The obtained results illustrated that the satellite stability cannot be realized on using gravity gradient torque and laser torque for passive control
Summary
CubeSats become the most popular spacecrafts due to their physical size and weight. E. gravity gradient, solar radiation pressure, aerodynamics and earth’s magnetic field) for stabilization and control These methods have been used due to their simplicity and low cost. The magnetic torquer is widely used as an actuator for geostationary satellites, small satellites and microsatellites These high-tech devices interact with the Earth’s magnetic field and create control torque, which can be adjusted to the required value. A further advantage over momentum wheels and gyroscopes is the absence of moving parts, which leads to a significantly higher reliability It depends on Earth's magnetic field strength which. With the intention of overcoming some disadvantages of the traditional attitude actuators, the issue of this work is to investigate the feasibility of using different ground based laser torques for passive and active attitude control of low Earth orbit CubeSats.
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