Grey-Box Models for Cyber-Physical Systems Reliability, Safety and Resilience Assessment

Abstract

Cyber-Physical Systems (CPSs) integrate physical components with cybernetic elements. Modeling the complex interactions that arise among these is necessary to realistically represent the physical processes, the interconnections among physical components and cybernetic elements, and the data transmission within the cyber network. The computational effort needed for the solution of such a model challenges the CPSs reliability, safety and resilience assessment, which implies simulating a large number of scenarios. Grey-Box Models (GMB), which combine physics-based and data-driven models, offer a way to tackle the problem, while keeping model accuracy and preserving interpretability. In this work, we elaborate on a hierarchy-based architecture of literature to develop a systematic methodology in support of the development of GBMs for CPSs. The methodology is exemplified by developing the GBM of an Integrated Power-Telecommunication (IP&TLC) CPS infrastructure.