Reentry Attitude Control for RLV Based on Adaptive Event-Triggered Sliding Mode

An adaptive event-triggered sliding mode control (AETSMC) algorithm is designed for the attitude control of the Reusable Launch Vehicle (RLV) subject to unknown external disturbances. First, an AETSMC strategy for a multi-variable second-order nonlinear system is proposed. Then, the stability of the proposed method is proved via the Lyapunov technique and the Zeno-free execution of triggering sequences is guaranteed. Furthermore, the proposed AETSMC strategy is applied to the attitude control of RLV. Finally, the developed method is validated by simulation, and the results show that the chattering phenomenon of control inputs is significantly weakened, and about 77.6% of the computational cost is saved while the desired performance of the system is ensured.