Open AccessSecure estimation for cyber‐physical systems under adversarial actuator attacks
Author(s) -
Xie ChunHua,
Yang GuangHong
Publication year - 2017
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2017.0561
Subject(s) - actuator , observer (physics) , control theory (sociology) , cyber physical system , computer science , linear system , focus (optics) , process (computing) , state (computer science) , adversarial system , noise (video) , control engineering , control (management) , engineering , mathematics , algorithm , artificial intelligence , operating system , mathematical analysis , physics , quantum mechanics , optics , image (mathematics)
Almost all of the available literature on secure state estimation focus on sensor attacks. Unlike the existing results, this study investigates the attack‐resilient state estimation problem for continuous‐time linear systems with sparse actuator attacks and process noises. It is assumed that, the attacker has limited resources and can only manipulate a certain number of actuators. Specifically, a novel switched observer is proposed with milder design conditions which are derived in terms of linear matrix (in)equalities. It is shown that, the observer not only provides an attack‐resilient state estimation, but also guarantees that the resulting observer error system is with noise attenuation level which can be optimised. Finally, a simulation example of a linearised reduced‐order aircraft system is provided to show the effectiveness of the proposed approach.