An exponent nonsingular fast terminal sliding mode(ENFTSM)control law is investigated in this paper for a rigid spacecraft with redundant thrusters in which thruster faults,and control input saturation as well as external disturbances have to be explicitly considered simultaneously.More specifically,in this proposed control scheme,fast convergence of spacecraft attitude tracking is achieved and faster reaching time can be guaranteed in comparison with the terminal sliding mode. When thruster fault occurs,th...