Dynamic Reconfiguration Strategy And Reliability Model Analysis Of Integrated Avionics System

The Integrated Modular Avionics System(IMA)carries real-time processing and information exchange tasks such as navigation,communication,surveillance,and flight management.It is a safety-critical system for aircraft.Dynamic reconfiguration,as an iconic technology of the next generation IMA system,not only effectively reduces hardware redundancy,but also greatly increases system flexibility and the ability to cope with different missions and resource failures.The reliability requirements of the dynamic reconfiguration process are the basic indicators to ensure the safe flight of the aircraft and the correct execution of the mission,and its importance is unquestionable.Therefore,it is necessary to carry out reliability analysis for it.Due to the complex nature of the dynamic reconfiguration process of the IMA platform,many reliability modeling methods have problems such as insufficient modeling accuracy,complicated process,and large amount of work,which is difficult to meet the reliability analysis requirements of dynamic reconfiguration IMA systems.In order to solve the above problems,a mathematical model-based modeling method is proposed to achieve accurate modeling and reliability analysis of the IMA reconfiguration process.Based on the capture of the integrated avionics system architecture and functional requirements,an in-depth study on its resource allocation and dynamic reconfiguration characteristics is conducted,and a dynamic reconfiguration strategy is proposed.Under the constraints of reconfiguration strategy,the joint k/n(G)reliability mathematical model conforming to the dynamic reconfiguration characteristics of IMA platform is constructed.To further verify the validity of the model,taking the single display function as an example,the model is analyzed for parameter sensitivity and compared with the general k/n(G)model.The results show that the joint model can realize reliability analysis of dynamic reconfiguration IMA system,and the results are credible.Based on the joint k/n(G)reliability mathematical model,the problem is further extended to one or more integrated areas.In the limited resource space,the problem is to allocate x avionics functions to k types of modules,and at the same time realize the resource allocation scheme with optimal system reliability and economic cost.By constructing the IMA platform resource matrix,functional service capability requirement matrix and optimization objective function,the multi-objective particle swarm optimization(MOPSO)algorithm is used to obtain the non-dominated optimal solution set.It can provide some theoretical guidance for improving system reliability and optimizing resource allocation.