This paper presents a secure chaotic communication scheme using observer-based synchronization of systems. A class systems satisfying incremental quadratic constraints are considered as the transmitter. The original message is encrypted in noise-like output system. circle criterion-based observer designed for system receiver by linear matrix inequalities technique. recovered at end from estimation error observer. To design observer, general algorithm to calculate multiplier matrices...

This article addresses the issues of bipartite time-varying formation (BTVF) control for multiagent systems (MASs) on signed digraphs. All designs are performed under assumptions that leader and followers suffer from external disturbances, input signal is unreachable to any follower, state variables unmeasurable. To begin with, an unknown observer (UIO) designed each follower using a traditional interval obtain estimates. realize BTVF tracking, distributed consensus error dynamic system...

This paper considers the observer design problem for a class of discrete-time system whose nonlinear time-varying terms satisfy incremental quadratic constraints. We first construct circle criterion based full-order by injecting output estimation error into terms. also reduced-order to estimate unmeasured state. The proposed observers guarantee exponential convergence state zero. is reduced solving set linear matrix inequalities. It proved that conditions under which exists existence...

In this article, the output consensus problems of nonlinear strict-feedback multi-agent systems with both external disturbance and sensor uncertainties are studied. To begin with, original system is shifted to a by state transformation, where all unknown information lumped into last equation. Specially, outputs transformed identical. Then, for system, an observer constructed get estimated state. For sake rejection, distributed input reconstructing scheme put forward via interval which...

This paper presents an observer-based security control scheme for a nonlinear cyber-physical system (CPS). Specially, the nonlinearity satisfies incremental quadratic constraints ([Formula: see text]) which can represent many types of common nonlinearities. The problems are discussed under assumption that both feedback and forward channels may suffer from denial-of-service (DoS) attacks. attack model is constructed in form time-delayed switching with four subsystems corresponding to...

This paper presents an observer-based security control scheme for a Cyber-Physical System (CPS). In the considered system, feedback channel of CPS may suffer from Denial-of-Service (DoS). To begin with, time-delayed switching model is constructed according to two different attack situations. And then, based on model, controller designed in cyber-layer, Meanwhile, stability closed-loop system analyzed H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper investigates the observer design for a class of nonlinear discrete-time systems satisfying incremental quadratic constraints. A circle criterion based full-order is constructed by injecting output estimation error into terms. We also construct reduced-order to estimate unmeasured system state. The proposed observers guarantee exponential convergence zero. reduced solving set linear matrix inequalities. It proved that conditions under which exists existence observer. Compared some...

Summary This article addresses the issue of bipartite containment tracking for nonlinear strict feedback multi‐agent systems (MASs) with disturbances and measurement uncertainties. To provides a better performance against strong disturbance, coordination transformation is applied such that all functions, controller uncertainties are lumped into single disturbance signal in last state equation. Then, compensated through novel rebuilding method. Moreover, order to get control performance,...