Design and Implementation of Continuous Bounded Finite-Time Attitude Control of Reusable Launch Vehicle
Zhiyu Li, Bailing Tian, Xiuyun Zhang, Qun Zong
Abstract
In this article, a novel continuous bounded finite-time control algorithm is proposed for reusable launch vehicle (RLV) attitude control system with mismatched disturbances and unknown control coefficients. The remarkable feature of the developed algorithm is to ensure the finite-time stability of the RLV attitude system with uniformly continuous bounded control torque signal. Meanwhile, a multivariable finite-time observer is designed to estimate the unknown mismatched disturbances, and the combination of the developed controller and observer could offer better robustness without losing control boundedness. Finally, numerical simulations and experimental results based on three-axis turntable are provided to verify the effectiveness and advantages of the proposed continuous bounded finite-time control method.