Quasi sliding mode fast maneuver control based on LESO of high agile small satellite

An improved quasi sliding mode rapid maneuver control algorithm based on linear extended state observer (LESO) of high agile small satellite is proposed. First of all, small satellite dynamics model and kinematics model are established in SGCMGs as actuator. Then, quaternion error feedback control scheme based on quasi sliding mode control is given, effectively weakening the chattering problem of sliding mode control system, realizing the fast mobile of small satellite. Considering the steady-state error of quasi sliding mode control system with disturbance, in order to further improve the steady state performance of the control system, using ADRC theory, the quasi sliding mode attitude control algorithm based on the LESO is designed in this paper. The experimental results show that, the algorithm proposed in this paper can stable and reliable work, motor speed reaches an average of 4.5 °/s, the attitude pointing accuracy is better than 0.0035 ° (3σ), and attitude stability is better than 0.007 °/s (3σ).