Quadrotor UAV has a strong mobility and flexibility in flight been widely used military civil fields recent years. An adaptive backstepping sliding mode control (ABSMC) method is proposed to address the trajectory tracking problem of quadrotor based on actuator fault external disturbance. In method, switching gain constructed design process order suppress chattering effect effectively by differ...

The fault-tolerant control (FTC) problem for fractional-order (FO) non-linear systems with unmodelled dynamics and actuator faults is studied. First, the author uses neural networks (NNs) to identify unknown functions apply a FO dynamic signal dynamics. Then, surface (FODSC) introduced in design process of adaptive backstepping algorithm avoid complex explosion problems. In addition, an NNs FTC...

In this paper, the modularized adaptive backstepping designs are incorporated into the recently proposed adaptive robust control framework to synthesize indirect adaptive robust controllers that achieve not only good output tracking performance but also better parameter estimation processes to obtain accurate parameter estimates for secondary purposes such as machine health monitoring and progn...

We pose and solve an \inverse optimal" adaptive tracking problem for nonlin-ear systems with unknown parameters. A controller is said to be inverse optimal when it minimizes a meaningful cost functional that incorporates integral penalty on the tracking error state and the control, as well as a terminal penalty on the parameter estimation error. The basis of our method is an adaptive tracking c...

The problem of designing an improved nonlinear robust controller is addressed adopting three perspectives for static synchronous compensator (STATCOM) system in the presence of time-delay, uncertainty parameter and external disturbances. At first, in order to reduce high degree coupling between system state variables and estimation errors, uncertain parameter is estimated by using the system im...

Small unmanned four-rotor helicopter (four-rotor) is a kind of noncoaxial, multirotor, dished vehicle with vertical take off and landing (VTOL) ability. Due to the complexity, strong coupling and sensitivity effects on the environment of four-rotor’s dynamic model, the controller must have high quality of robust and adaptive. According to these requirements, a lot of control theory have been pr...