Fully Actuated System Based Spacecraft Attitude Finite Time Control

This paper addresses the problem of attitude stabilization control in finite time. Considering the nonlinear system under external disturbance and model uncertainty, an attitude controller based on Fully Actuated System (FAS) can be designed to compensate the nonlinearity. Compared to traditional controllers, FAS is often more immune to the nonlinear factors and its control law is easier to design. FAS compound with Fast Terminal Sliding Mode (FAFSM) is designed to guarantee the system state stable within finite time. The simulation results show that the proposed FSFSM is tolerant to the external disturbance. And it can make the dynamic response more superior with 4-5s faster convergence, which means our algorithm can achieve more quality dynamic character in finite time by comparing with single FAS controller. This explores the application in spacecraft control of FAS.