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An Optimal Hybrid Learning Approach for Attack Detection in Linear Networked Control Systems 被引量:2
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作者 Haifeng Niu Avimanyu Sahoo +1 位作者 chandreyee bhowmick S·Jagannathan 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2019年第6期1404-1416,共13页
A novel learning-based attack detection and estimation scheme is proposed for linear networked control systems(NCS),wherein the attacks on the communication network in the feedback loop are expected to increase networ... A novel learning-based attack detection and estimation scheme is proposed for linear networked control systems(NCS),wherein the attacks on the communication network in the feedback loop are expected to increase network induced delays and packet losses,thus changing the physical system dynamics.First,the network traffic flow is modeled as a linear system with uncertain state matrix and an optimal Q-learning based control scheme over finite-horizon is utilized to stabilize the flow.Next,an adaptive observer is proposed to generate the detection residual,which is subsequently used to determine the onset of an attack when it exceeds a predefined threshold,followed by an estimation scheme for the signal injected by the attacker.A stochastic linear system after incorporating network-induced random delays and packet losses is considered as the uncertain physical system dynamics.The attack detection scheme at the physical system uses the magnitude of the state vector to detect attacks both on the sensor and the actuator.The maximum tolerable delay that the physical system can tolerate due to networked induced delays and packet losses is also derived.Simulations have been performed to demonstrate the effectiveness of the proposed schemes. 展开更多
关键词 ATTACK detection ATTACK estimation event-triggered CONTROL Lyapunov stability networked CONTROL system(NCS) OPTIMAL CONTROL Q-LEARNING
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