Modelling and Analysing the Landing Gear System: a Solution with Event-B/Rodin

TL;DR

This paper demonstrates a systematic formal modeling approach for the landing gear system using Event-B and Rodin, covering both digital and controlled parts, with safety properties formalized and verified.

Contribution

It introduces a structured method combining feature augmentation and structural refinement for modeling complex systems in Event-B.

Findings

Safety properties are successfully formalized and proved.

The approach is systematic and applicable to similar case studies.

Experimentations validate the effectiveness of the method.

Abstract

This paper presents a solution to the landing gear system case study using Event-B and Rodin. We study the whole system (both the digital part and the controlled part). We use feature augmentation to build an abstract model of the whole system and structural refinement to detail more specifically the digital part. The required safety properties are formalised and proved. We propose a specific approach to deal with a family of reachability properties. The experimentations conducted during the study are supported by the Rodin tools. We show that the presented solution is systematic and it can be applied to similar case studies.