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Networked Control Systems (NCS) have revolutionized modern control engineering by facilitating distributed monitoring and operation across critical infrastructure domains. However, the integration of communication networks introduces a dual challenge: network-induced phenomena, such as time delays and packet losses, degrade operational performance, while exposure to sophisticated cyberattacks compromises system integrity and safety. This paper addresses these fundamental challenges through a unified Internal Model Control (IMC)-based framework that simultaneously achieves computational efficiency, systematic realizability, and intrinsic cyber-resilience. Three novel controller architectures are developed: (i) an optimization-free IMC-PID controller for Second-Order Plus Dead Time (SOPDT) systems utilizing maximum sensitivity analysis, delivering closed-form gain expressions with deterministic O(1) computational complexity; (ii) a physically realizable IMC-based Proportional-Integral-Derivative with Acceleration (PIDA) controller for Third-Order Plus Time Delay (TOPTD) systems, which systematically resolves the persistent realizability challenge through filtered derivative incorporation while preserving single-parameter tuning; and (iii) a cyber-resilient IMC-PID-II controller explicitly designed to mitigate Man-in-the-Middle (MitM) attacks in NCS through double integrator architecture, providing intrinsic resilience against malicious data injection attack. Comprehensive validation through high-fidelity simulations on benchmark processes, microgrid frequency control systems, and DC–DC converters, coupled with experimental verification using WAVECT WCU300 real-time controller, confirms superior transient response, disturbance rejection, parametric robustness, and cyber-attack resilience.
Badavath et al. (Thu,) studied this question.