Parametric schedulability analysis of a launcher flight control system under reactivity constraints
This work addresses the challenge of reducing development costs and durations for complex space systems, but it is incremental as it applies existing formal methods to a specific domain.
The paper tackles the problem of automatically synthesizing scheduling parameters for a space launcher flight control system under reactivity constraints, using a parametric formal model and tool-based synthesis, and compares results to other scheduling tools.
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 on 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 problematic of the scheduling of a launcher flight control, then we show how this problematic can be formalized with parametric stopwatch automata; we then present the results computed by IMITATOR. We compare the results to the ones obtained by other tools classically used in scheduling.