Study of robustly reliable design for a class of nonlinear systems

This paper explores the active reliable control issues for a class of uncertain nonlinear affine systems using an Integral-type Sliding Mode Control (ISMC) scheme. The presented scheme not only maintains the main advantages of the ISMC design, including robustness, rapid response and easy implementation, it can also tolerate some of the actuators´ faults whenever a fault detection and diagnosis information is available. In this study, the uncertainties are not required to be in matched-type; however, when it is in matched-type, the state trajectories of the nominal healthy subsystem and the uncertain faulty system are identical. As a result, the engineers are allowed to predictively address the matched-type uncertain faulty system performance in light of that of the nominal healthy subsystem.