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首页> 外文会议>Safety-Critical Systems Symposium; 20050208-10; Southampton(GB) >Exploring the Possibilities Towards a Preliminary Safety Case for IMA Blueprints
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Exploring the Possibilities Towards a Preliminary Safety Case for IMA Blueprints

机译：探索IMA蓝图初步安全案例的可能性

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The Aim of this paper is to show how a safety argument could be constructed for the use of blueprints in platforms using Integrated Modular Avionics (IMA). It is assumed that the IMA system will contain safety-critical elements. Given current safety analysis techniques, there is no certainty that this can be achieved satisfactorily. Initially there is a need to define a blueprint: once this is done, the blueprints will be considered by looking at the impact of Blueprints on IMA Safety. The ultimate objective of IMA is to produce a reconfigurable system. Whilst this has potential safety benefits, there are substantial problems with the ability to argue that a reconfigurable IMA is safe. Consequently, this project will concentrate on a 3 Step Approach towards developing full IMA capability. The three steps are: 1. Fixed number of prioritised configurations (e.g. lookup table); 2. Ground (static) reconfiguration (between operations); 3. Dynamic reconfiguration. This approach is progressively more complex, but will enable confidence to be gained from success at each step. The safety argument that is produced in this paper is generic and has been produced as part of an MSc project. However, the overall IMA safety argument needs to consider many other issues and factors, which may affect the safety of blueprints. This is not covered in this paper, but is expanded in more detail in the MSc project (Jolliffe 2004).
机译：本文的目的是展示如何在使用集成模块化航空电子设备（IMA）的平台中使用蓝图构建安全性论证。假定IMA系统将包含安全关键元素。使用当前的安全分析技术，尚不能确定可以令人满意地实现这一目标。最初需要定义一个蓝图：完成后，将通过查看蓝图对IMA安全的影响来考虑该蓝图。 IMA的最终目标是生产可重新配置的系统。尽管这样做具有潜在的安全益处，但是在争论可重构IMA是安全的能力方面存在很多问题。因此，该项目将集中于“三步走”方法，以开发完整的IMA功能。这三个步骤是：1.固定数量的优先配置（例如查找表）； 2.接地（静态）重新配置（两次操作之间）； 3.动态重新配置。这种方法越来越复杂，但可以使您在每个步骤中都从成功中获得信心。本文提出的安全性论点是通用的，并且已作为MSc项目的一部分提出。但是，整体IMA安全性论点需要考虑许多其他问题和因素，这可能会影响蓝图的安全性。本文未涵盖此内容，但在MSc项目（Jolliffe 2004）中有更详细的介绍。

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