Parametric schedulability analysis of a launcher flight control system under reactivity constraints

TL;DR

This paper introduces a parametric schedulability analysis method for space launcher flight control systems, automating parameter synthesis to ensure real-time constraints are met, thus improving design efficiency.

Contribution

It formalizes launcher flight control scheduling using parametric stopwatch automata and demonstrates automated parameter synthesis with the IMITATOR tool, considering context switch times.

Findings

Successful formalization of the scheduling problem

Effective parameter synthesis with IMITATOR

Comparison showing advantages over traditional tools

Abstract

The next generation of space systems will have to achieve more and more complex missions. In order to master the development cost and duration of such systems, an alternative to a manual design is to automatically synthesize the main parameters of the system. In this paper, we present an approach for the specific case of the scheduling of the flight control of a space launcher. The approach requires two successive steps: (1) the formalization of the problem to be solved in a parametric formal model and (2) the synthesis of the model parameters with a tool. We first describe the problem of the scheduling of a launcher flight control, then we show how this problem can be formalized with parametric stopwatch automata; we then present the results computed by the parametric timed model checker IMITATOR. We enhance our model by taking into consideration the time for switching context, and we compare the results to those obtained by other tools classically used in scheduling.