Adaptive backstepping flight control with actuator saturation (Q2748749)

Because actuator saturation can become a problem or even a disaster in a flight control system, the consideration of actuator saturation in the design phase may indeed reduce the degree of conservativeness of a flight control system (FCS) and thus noticeably enhance its performance. Deflection limits and rate limits are both considered in a new adaptive backstepping FCS design process. The key of the method is that a new control Laypunov function and a control law are chosen when the actuator saturation occurs. This idea follows from the fact that there must be a variation in the pseudo-control at saturation. The whole progress is a modification of an earlier presented method: the adaptive backstepping control scheme. The stability is proved and verified successfully. The conclusion and some comments about this method are given at the end.