Disturbance observer-based second order sliding mode attitude tracking control for flexible spacecraft

Observer-based adaptive sliding mode fault-tolerant control for the underactuated space robot with joint actuator gain faults

“…Thus, the space robot is a kind of nonlinear underactuated system. The space robot can assist astronaut to complete a series of high-risk space tasks, such as spacecraft on-orbit assembly, satellite maintenance and visual inspection [3,13,15,27], so it can improve the efficiency of space exploration and reduce the cost. The dynamics and control of the space robots have attracted great attention of the space technicians all over the world.…”