Browse Publications Technical Papers 2018-01-1943
2018-10-30

Model-Based System Engineering Methodology for Implementing Networked Aircraft Control System on Integrated Modular Avionics - Environmental Control System Case Study 2018-01-1943

Integrated Modular Avionics (IMA) architecture host multiple federated avionics applications into a single platform and provides benefits in terms of size, weight and power. But, IMA brings a high level of complexity to aircraft control systems. In this context, a structured Model-Based Systems Engineering (MBSE) development method is promising to deal efficiently and effectively with the complex aircraft control system design. This paper presents a MBSE approach for the use case of the Environmental Control System (ECS) integration into the aircraft control architecture. The proposed methodology adapts the open source ARCADIA methodology and the Capella tool to evaluate a complete design cycle: starting with requirements capture from the aircraft level to streamlining the development, integration of avionics application in an ARINC 653 platform. The presented methodology will help coping with the complexity of the integration of several real-time embedded control systems of mixed-criticality, addressing the challenges of using shared processing and networking resources. At first, a generic architecture specification model for the ECS has been developed. Analysis has been done on the reusability of a model for various implementations such as conventional or more-electrical aircraft systems, including a detailed data flow model. Next, a use case of Cabin Pressure Control System (CPCS) has been developed. The CPCS controller model is derived from the ECS specification model. Furthermore, an ECS application from controller model has been developed as part of a practical demonstration of the new MBSE process. The presented paper provides insights in the challenges and advantages of the MBSE process in contrast to the traditional paper based specification process, applicable beyond the presented ECS use case.

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