Adaptive Attitude Stabilization Control

Although many observers, sliding mode observer (SMO), or even finite-time observer for state estimation, and observer-based output feedback control approaches have been reported, those schemes are characterized by two drawbacks: (1) they are designed based on the assumption that all actuators operate normally, i.e., actuator faults never occur; and (2) a practical issue, i.e., actuator constraint is not investigated. Challenging operating conditions increase the possibility of malfunctions in sensors, actuators, and controllers.