Observer-based fuzzy adaptive dynamic event-triggered attitude control of ultra-low-orbit spacecraft

The attitude control problem of ultra-low-orbit plug-and-play (ULO PnP) spacecraft, significantly influenced by substantial disturbances, limited communication capabilities, actuator faults, and inertial uncertainty, is investigated. To address these challenges, a Dynamic Event-Triggered Mechanism (DETM) is introduced to conserve communication resources among wireless modules. Following this, a fuzzy observer based on trigger signal is designed to approximate the integrated disturbances, including the influence of external disturbances, DETM, actuator faults and inertial uncertainty. Based on the above, a fault-tolerant fuzzy control law is designed to achieve high-precision attitude control in the integrated disturbances. Finally, stability analysis and numerical simulations tailored to the characteristics of ULO spacecraft ensure the reliability and efficiency of attitude control in ULO PnP spacecraft, particularly in scenarios where traditional control methods may falter due to the aforementioned challenges.