Switched Hybrid Control Scheme for Spacecraft Attitude Control with Low-Frequency Actuator Activation

This paper focuses on the problem of spacecraft attitude control to achieve system stabilization while reducing the frequency of actuator activation. To address this challenge, we present a switched hybrid control scheme that integrates the intermittent and the continuous control logic, and automati-cally switches between them based on state-dependent judgment conditions. A Composite Event-Trigger mechanism (CTM) is first presented to realize an intermittent control, which consists of two triggers responsible for actuator turn-on and turn-off behaviors. Subsequently, we present a switching strategy for selecting appropriate control modes, providing a reliable selection between the intermittent and continuous execution strategy. We then elaborate on the system's boundedness through a Lyapunov analysis, and numerical simulation results are carried out to validate the effectiveness of the proposed control scheme.