An adaptive control scheme for switched nonlinear cyber-physical systems
against state-dependent sensor attacks and input-dependent actuator
attacks
Abstract
This paper considers the problem of adaptive control against deception
attacks for a class of switched nonlinear cyber-physical systems (CPSs),
in which each subsystem has more general and unknown nonlinearities.
Specifically, an adaptive controller is designed for CPSs with unknown
switching mechanisms to mitigate the impact of state-dependent sensor
attacks and input-dependent actuator attacks. Compared with the existing
researches, the actuator attacks considered in our paper are
input-dependent, which means the controller is substantially attacked,
besides, the signs of unknown time-varying gains caused by
state-dependent sensor attacks and input-dependent actuator attacks are
all unknown. To deal with these scenarios, Nussbaum-type functions are
introduced. In addition, by constructing a common Lyapunov function for
all subsystems, the closed-loop system signals are proved to be globally
bounded under arbitrary switchings. Finally, we give a simulation
example of a continuously stirred tank reactor system with
state-dependent sensor attacks and input-dependent actuator attacks to
illustrate the effectiveness of our results.