Robust Tracking Control Design for a Class of Nonlinear Networked Control Systems Considering Bounded Package Dropouts and External Disturbance

This paper concerns the tracking control problem of nonlinear networked control systems (NCSs) considering external disturbance and random package dropouts. The sensor samples system states periodically. The sampled data packages may have dropouts while being transmitted through communication networks. Notice that the number of consecutive lost packages is usually lower and upper bound. Then, an aperiodically sampled data model is employed to describe such a networked control system. By utilizing an augmented state approach, the tracking control problem is transformed into the stabilization for the augmented system. A new two-sided-looped functional (TSLF) is introduced, and the system state and the sampling pattern are fully encountered. Sufficient conditions are derived to design controllers, presented as a series of linear-matrix inequalities (LMIs). A surface-mounted permanent magnet synchronous motor (SMPMSM) model and Rossler's chaotic system are provided to demonstrate the effectiveness of the proposed method.