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arXiv · 1908.03284

Monitor-Based Runtime Assurance for Temporal Logic Specifications

Matthew Abate·Eric Feron·Samuel Coogan
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Abstract

This paper introduces the safety controller architecture as a runtime assurance mechanism for system specifications expressed as safety properties in Linear Temporal Logic (LTL). The safety controller has three fundamental components: a performance controller, a backup controller, and an assurance mechanism. The assurance mechanism uses a monitor, constructed as a finite state machine (FSM), to analyze a suggested performance control input and search for system trajectories that are bad prefixes of the system specification. A fault flag from the assurance mechanism denotes a potentially dangerous future system state and triggers a sequence of inputs that is guaranteed to keep the system safe for all time. A case study is presented which details the construction and implementation of a safety controller on a non-deterministic cyber-physical system.

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Matthew Abate, Eric Feron, Samuel Coogan. 2019-08-08. Monitor-Based Runtime Assurance for Temporal Logic Specifications. https://arxiv.org/abs/1908.03284

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