Search

• To avoid explosion of complexity and compensate filtered errors, a finite-time command filtered backstepping approach is proposed for nonlinear systems with external disturbances. • To satisfy the transient and steady-state performance of tracking errors, the BLF method is applied to dynamic nonlinear systems, which can guarantee that the full states are constrained. • To verify the effectiveness of the proposed method, it is applied to TCP/AQM network systems for the first time to avoid network congestion in finite time. This work studies the issue of finite-time tracking control for a class of nonlinear systems with state constraints. By means of command filtered backstepping technique, finite-time theory and Barrier Lyapunov Functions (BLF), a novel finite-time command filtered backstepping approach is presented to guarantee the finite-time convergence of tracking errors. The new proposed method can not only reduce the complexity of computation of the conventional backstepping control and compensate filtered errors by Dynamic Surface Control (DSC), but also can guarantee that the state variables are restricted in compact bounding sets. Moreover, the proposed controller is designed and applied to Transmission Control Protocol/Active Queue Management (TCP/AQM) network systems, which guarantees the practical boundedness of all the signals in the closed-loop system. Finally, the effectiveness and practicability of the developed control strategy are validated by a TCP network simulation example. [ABSTRACT FROM AUTHOR]