Quantized Tracking Control for Nonlinear Systems Under DoS Attacks and Disturbances

This paper studies the problem of quantized back-stepping tracking control for a class of nonlinear systems under Denial-of-Service (DoS) attacks and disturbances. Due to limited network resources, only finite bits of data can be transmitted per time unit. An encoding-decoding scheme is designed to guarantee finite data transmissions and robustness against DoS attacks and disturbances. Filtering techniques are employed to avoid repeatedly differentiating discontinuous state variables in the design of virtual control signals. All signals in the closed-loop system are globally uniformly bounded and the tracking error converges to a neighborhood of the origin. Simulation results illustrate the effectiveness of the proposed control schemes.