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NASA NTRS · 20240010429

A Verification Framework for Runtime Assurance of Autonomous UAS

J Tanner Slagel·Lauren M. White·Aaron Dutle·Cesar A. Munoz·Nicolas Crespo
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PVSRuntime AssurnaceHybrid ProgramsPlaidypvs

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J Tanner Slagel, Lauren M. White, Aaron Dutle, Cesar A. Munoz, Nicolas Crespo. A Verification Framework for Runtime Assurance of Autonomous UAS. https://ntrs.nasa.gov/citations/20240010429

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Embedding Differential Dynamic Logic in PVS

Differential dynamic logic (dL) is a formal framework for specifying and reasoning about hybrid systems, i.e., dynamical systems that exhibit both continuous and discrete behaviors. These kinds of systems arise in many safety- and mission-critical applications. This paper presents a formalization of dL in the Prototype Verification System (PVS) that includes the semantics of hybrid programs and dL’s proof calculus. The formalization embeds dL into the PVS logic, resulting in a version of dL whose proof calculus is not only formally verified, but is also available for the verification of hybrid programs within PVS itself. This embedding, called Plaidypvs (Properly Assured Implementation of dL for Hybrid Program Verification and Specification), supports standard dL style proofs, but further leverages the capabilities of PVS to allow reasoning about entire classes of hybrid programs. The embedding also allows the user to import the well-established definitions and mathematical theories available in PVS.

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