Event-Triggered Attitude Regulation of Rigid Spacecraft with Uncertain Inertia Matrix

This paper studies event-based attitude regulation design for uncertain rigid spacecraft in terms of Rodriguez parameters. First, an input-to-state stabilizing controller is developed to quantify the effect of sampling error, allowing us to embed an event-triggering mechanism by virtue of this specific external stability. It leads to a valid event-triggered controller for attitude regulation with any specified precision. A numerical example is presented to illustrate the effectiveness of the proposed algorithm.