A cyber resilient design for control systems

To achieve the 5 R's of resilient control systems (RCSs), specifically recon, resist, respond, restore and ultimately recover, a cyber resilient control system must be able to proactively recognize and respond to uncertain threats. These threats can be from cyber or physical origins, including benign and malicious human. This paper focuses on cyber threats. Like a multi-agent hierarchy for a resilient control system design, a hierarchical multi-agent dynamic system (HMADS) cyber recognition and response architecture would contribute to system resilience. A hierarchical framework based upon a 3-layer multiagent system with recognition and response capabilities for cyber events is proposed that benefits from the tiers of recognition and response and collection of distributed data sets to improve confidence in recognition due to the increased data richness. The benefits of the distributed vs centralized can be realized. Each level of the hierarchy includes cyber "sensors"and "actuators"providing a traditional control system like attenuation of error signal due to cyber-attacks.