Abstract
In recent years, the integrated modular avionics (IMA) concept has been introduced to replace the traditional federated avionics. Different avionics functions are hosted in a shared IMA platform, and IMA adopts partition technologies to provide a logical isolation among different functions. The IMA architecture can provide more sophisticated and powerful avionics functionality; meanwhile, the failure propagation patterns in IMA are more complex. The feature of resource sharing introduces some unintended interconnections among different functions, which makes the failure propagation modes more complex. Therefore, this paper proposes an architecture analysis and design language- (AADL-) based method to establish the reliability model of IMA platform. The single software and hardware error behavior in IMA system is modeled. The corresponding AADL error model of failure propagation among components, between software and hardware, is given. Finally, the display function of IMA platform is taken as an example to illustrate the effectiveness of the proposed method.
Highlights
As an important development direction of future large aircraft avionics system, integrated modular avionics (IMA) completes the real-time processing and information exchange task in navigation, communication, monitoring, and flight management through the integrated technology of avionics system [1], to ensure the flight safety effectively.IMA is a safety critical system of civil aircraft
The failure propagation mechanism of IMA is so complex that the traditional reliability analysis method is not applicable to solve the problems of IMA architecture reliability assessment
This paper introduces the reliability analysis technology based on AADL error model [2]
Summary
As an important development direction of future large aircraft avionics system, IMA completes the real-time processing and information exchange task in navigation, communication, monitoring, and flight management through the integrated technology of avionics system [1], to ensure the flight safety effectively. IMA is a safety critical system of civil aircraft It uses resource sharing, data fusion, and restoration reconfiguration technology, which makes IMA highly complex and brings great challenges to IMA safety and reliability assessment. The failure propagation mechanism of IMA is so complex that the traditional reliability analysis method is not applicable to solve the problems of IMA architecture reliability assessment. It is of great significance to study the reliability assessment method and to complete the work of IMA architecture reliability assessment. To solve these problems, this paper introduces the reliability analysis technology based on AADL error model [2]. We take the display function as an example to make a comparison and analysis on different IMA architectures of its availability to draw conclusions on quantitative analysis
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