Maryam  Fattahi, Ahmad  Afshar, 
    Observer Based Resilient Control of Networked Control Systems Against Cyber Attacks to
Sensor,
    International Journal of System Signal Control and Engineering Application,
    Volume 13,Issue 3,
    2020,
    Pages 66-74,
    ISSN 1997-5422,
    ijssceapp.2020.66.74,
    (https://makhillpublications.co/view-article.php?doi=ijssceapp.2020.66.74)
    Abstract: The object of this article is to propose novel
observer-based resilient control for Networked Control
Systems (NCS) against cyber-attacks to sensor. It is
assumed system is under cyber-attacks that occurred in
sensor such that attacker can access to sensor and
consequently injects false data to sensor. To achieve
resilience in such conditions, at first a novel observer is
proposed in order to estimate the actual states of system.
Then a novel observer based controller is proposed in
order to NCS in conditions of attack remains stable.
Applying Lyapunov-Krasovskii functional method, delay
dependent resilient criterion is established to show the
exponential behavior of NCS in such conditions. Finally,
for evaluating results, a practical example will be
discussed.
    Keywords: exponential behavior;cyber attacks;lyapunov-krasovskii functional;networked control systems;Observer-based resilient control