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Technical Paper

Transitioning to Model-Based Avionics Display Development

2013-09-17
2013-01-2115
The design of integrated modular avionics (IMA) for next-generation aircraft is a significant challenge for the industry in terms of complexity, time-to-market, certification and design effort. Because of those constraints, traditional hand-coding may no longer be a cost-effective option, especially for DO-178C Design Assurance Level (DAL) A Safety-critical applications. While the use of Commercial Off-The-Shelf (COTS) HMI-modeling tools could be a more efficient option, its introduction in an existing environment may result in high risk and effort. This paper presents the approach for the evaluation of the SCADE Display tool for a primary flight display (PFD) application. In this evaluation, a subset of a previously developed PFD was re-modeled with SCADE Display. The creation of the model served as an evaluation of the usability and the flexibility of the tool. The integration of the generated code on an existing platform was evaluated.
Technical Paper

A Multi-disciplinary and Multi-scale Simulation-Based Approach for the Design of Control Systems

2013-09-17
2013-01-2212
This paper introduces a model-based systems and embedded software engineering, workflow for the design of control systems. The interdisciplinary approach that is presented relies on an integrated set of tools that addresses the needs of various engineering groups, including system architecture, design, and validation. For each of these groups, a set of best practices has been established and targeted tools are proposed and integrated in a unique platform, thus allowing efficient communication between the various groups. In the initial stages of system design, including functional and architectural design, a SysML-based approach is proposed. This solution is the basis to develop systems that have to obey both functional and certification standards such as ARINC 653 (IMA) and ARP 4754A. Detailed system design typically requires modeling and simulation of each individual physical component of the system by various engineering groups (mechanical, electrical, etc.).
Technical Paper

Using SCADE System for the Design and Integration of Critical Systems

2011-10-18
2011-01-2577
This paper presents the SCADE System™ product line for systems modeling and generation based on the SysML standard and the Eclipse Papyrus open source technology. SCADE System has been developed in the framework of Listerel, a joint laboratory of Esterel Technologies, provider of the SCADE® tools, and CEA LIST, project leader of the Eclipse component, Papyrus. From an architecture point of view, the Esterel SCADE tools are built on top of the SCADE platform which includes both SCADE Suite®, a model-based development environment dedicated to critical software, and SCADE System enabling model-based system engineering. SCADE System includes Papyrus, an open source component (under EPL license), integrated in the modeling platform of Eclipse. Using this integrated modeling platform, both system and software teams share the same environment for system development. Furthermore, other model-based tools can be added to the environment, due to the use of Eclipse.
Technical Paper

SCADE Solutions for the Efficient Development of ARINC 661 Cockpit Display Systems and User Applications

2011-10-18
2011-01-2578
The ARINC 661 standard [1] defines a Cockpit Display System (CDS) interface intended for all types of aircrafts installations. This paper presents an integrated solution based on Commercial Off-The-Shelf (COTS) tools that allows, in the initial stage of an aircraft project, support for the expression of requirements with regards to the CDS definition and the CDS interaction with the User Applications (UAs). It also enables prototyping of the systems architecture from the point of view of functionalities and performance. At a later stage of the project, this same integrated tool suite can be used to produce and certify the final embedded software code within the CDS and to generate the communication code between the CDS and the UAs.
Technical Paper

Formal Verification for Model-Based Development

2005-04-11
2005-01-0781
Formal verification is increasingly used for checking and proving the correctness of digital systems. In this paper, we present formal verification as a cost-effective technique for the verification and validation of model-based safety-critical embedded systems. We start by explaining how formal verification can be easily integrated in a model-based development methodology for critical embedded software. In the methodology examined, the development methods are based upon a formal and deterministic language representation and a correct-by-construction automatic code generation. In this methodology, formal verification proves that what you execute conforms to safety requirements, and what you execute is exactly what you embed. We show the impacts and benefits of using formal verification in software development that must be compliant with the IEC 61508 standards, especially for SIL 3 and SIL 4 software development.
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