Finite-time control for nonlinear spacecraft attitude based on terminal sliding mode technique.
In this paper, a fast terminal sliding mode control (FTSMC) scheme with double closed loops is proposed for the spacecraft attitude control. The FTSMC laws are included both in an inner control loop and an outer control loop. Firstly, a fast terminal sliding surface (FTSS) is constructed, which can drive the inner loop tracking-error and the outer loop tracking-error on the FTSS to converge to zero in finite time. Secondly, FTSMC strategy is designed by using Lyaponov's method for ensuring the occurrence of the sliding motion in finite time, which can hold the character of fast transient response and improve the tracking accuracy. It is proved that FTSMC can guarantee the convergence of tracking-error in both approaching and sliding mode surface. Finally, simulation results demonstrate the effectiveness of the proposed control scheme.
Faculty of Electroric Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, PR China. Electronic address: songzhankuiwudi@163.com.
Zhankui
Z
Song
Faculty of Electroric Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, PR China.
Hongxing
H
Li
Faculty of Electroric Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, PR China.
Kaibiao
K
Sun
Double closed loops; Fast terminal sliding mode control; Finite time; Spacecraft attitude control