A performance degradation modeling and simulation method for an integrated modular avionics system

Abstract

The invention provides an IMA (Integrated Modular Avionics) system performance degradation modeling and simulation method, and relates to the field of aircraft avionics. The IMA system performance degradation modeling and simulation method comprises the step of regarding performance of a soft fault in a whole IMA life cycle as representation of IMA system performance degradation to accordingly build an IMA system performance degradation model. The IMA system performance degradation modeling and simulation method avoids the dilemma that data driving based modeling cannot be carried out by utilizing original data due to insufficient IMA system performance degradation, provides a new idea for the IMA performance degradation modeling and describes an IMA system performance change course by combining a resource reliability function with the fact whether soft faults such as an intermittent fault and a transient fault occurs in the whole IMA period; as the IMA system performance degradation course is expressed by a probability model, the cost is low and a foundation for condition-based maintenance is laid.

Description

technical field [0001] The invention relates to the field of aircraft avionics, in particular to a simulation method for performance degradation of an avionics system. Background technique [0002] Failure of the Integrated Modular Avionics (IMA) system infrastructure will affect all systems using this shared resource. The failure of a resource may cause the overall failure, partial failure, or loss of redundancy of all applications that directly use the resource. The main effects of failed resources can be determined through analysis and / or testing. However, cascading failures caused by failed resources are difficult to determine in many cases. [0003] Although there is enough information to assist IMA developers to make a comprehensive safety assessment, including failure analysis of a very complex IMA system, however, several complex avionics systems currently in service abroad (including non-ARINC653 architecture systems) , under failure conditions, many unexpected p...

AI Technical Summary

Problems solved by technology

However, the application of health management to airborne avionics systems is still in its infancy, especially with the characteristics of high complexity, many components involved in the system, multi-attributes, nonlinearity, etc., such as IMA, each module, function or sub-system of the system The coupling relationship between systems is tight, the transmission and impact of faults are complex, and the symptom parameters of electronic system faults are not obvious enough or are sudden changes. These factors increase the difficulty of achieving the purpose of condition-based maintenance of integrated modular avionics systems

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