Adaptive non-singular second-order terminal sliding mode control for cyber-physical systems subject to actuator cyber-attacks and unwanted disturbances

In this study, a novel strategy of the adaptive non-singular second-order terminal sliding mode (SOTSM) control technique for the finite time stabilization of cyber-physical systems (CPSs) is proposed. By utilizing the proposed nonlinear sliding surface, the reaching phase is obliterated and the entire system's robust operation is ameliorated. The offered online adaptive laws deal with the unwanted disturbances and cyber-attacks, so that there is no need to identify their upper bounds. The designed adaptive non-singular SOTSM control technique provides the strong robustness of CPSs in the presence of the unwanted disturbances and cyber-attacks. Also, it guarantees high precision, pliable performance, fast response, smooth control, chattering-free operation without transient oscillations, and appropriate convergence in the finite time. Numerical simulation results demonstrate effectiveness and success of the proposed adaptive non-singular SOTSM control technique compared to the results of state feedback control (SFC), conventional sliding mode control (SMC), and integral-type SMC methods.