Design and validation of a sliding mode disturbance observerbased control for a CubesSat nano-satellite

Document Type : Original Article

Authors

1 Mechatronics Engineering Department, German University in Cairo, Cairo, Egypt.

2 Mechatronics Engineering Department, German University in Cairo, Cairo, Egypt.+

3 Mechanical Engineering Department, Al-Azhar University, Cairo, Egypt.

10.1088/1757-899X/610/1/012035

Abstract

Cubesat-class nanosatellites are characterized by their inexpensive cost of manufacturing and launch; thus, have gained a lot of interest in research recently. An actuator model for the three Magnetorquers and three reaction wheels is derived, as well as the kinematical and dynamical model of the Cubesat, for implementing an Attitude Determination and Control System (ADCS). Two different control approaches are investigated. Firstly, a Quaternion Feedback (QF) algorithm is derived and applied to assess the response of the system. Furthermore, a Sliding Mode Disturbance Observer-Based Control (SMDO) is implemented to achieve robustness against the un-modeled dynamics represented in the high coupling between the reaction wheels and the satellite dynamics. The SMDO controller has reduced the oscillations in the states response as well as the stabilization time in comparison to the QF controller. Finally, the effectiveness of SMDO has shown a significant decrease in the control effort compared to conventional sliding mode control.
International Conference on Aerospace Sciences and Aviation Technology
Volume 18, Issue 18
18th International Conference on Aerospace Sciences & Aviation Technology 9–11 April 2019
April 2019
Pages 1-12

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