Event-triggered attitude tracking for rigid spacecraft

Abstract

This study aims to investigate the problem of attitude control for a spacecraft with inertial uncertainties, external disturbances, and communication restrictions. An event-triggered active disturbance rejection control approach is proposed for attitude tracking of the spacecraft. An event-triggered mechanism is introduced together with an extended state observer to jointly monitor the system states and total disturbances. The observation error is proved to be uniformly bounded. Based on the proposed control scheme, the integrated tracking system is shown to be asymptotically stable, implying successful attitude tracking of the spacecraft for the desired motion. Numerical results illustrate the effectiveness of the control strategy in achieving satisfactory tracking performance with a reduced data-transmission cost.

Adaptive fuzzy backstepping control for attitude stabilization of flexible spacecraft with signal quantization and actuator faults

“…Considering the state quantization error e x2 (t) in (43), it can be seen that e x2 (t) is coupled with state variables, unknown nonlinearity function, external disturbances, and control input, which makes it complex to eliminate the effects of both state quantization and input quantization behavior. Therefore, we should focus on the characteristics of both dynamic quantizer Q µ1 and static quantizer Q µ2 .…”

“…Recently, the network communication technique has been combined with the fast-integrated technology in aerospace engineering, resulting in plug-and-play satellites. These satellites comprise independent functional modules, where data are exchanged between two modules via wireless connectors [43,44]. Further, they exhibit several advantages, including low cost and fast integration.…”