THE FUNCTIONAL MODEL OF THE REDUNDANCY MANAGEMENT SYSTEM OF AIRCRAFT AIRBORNE EQUIPMENT COMPLEXES BASED ON CONFIGURATION SUPERVISORS
The only way of development of aircraft onboard equipment complexes is to introduce deliberate redundancy of their hardware and software resources using special means of managing available redundant resources. In the development of redundancy management methodology based on special structures called configuration supervisors, the task is to develop a generalized functional model of the system "control object (aircraft) + on-board equipment complex + redundancy management system", that reflects the dynamics of their interaction. The model has been developed that includes four groups of functions: a) functions of storing data on configurations, results of monitoring the readiness and effectiveness of configuration components, redundancy management system modes; b) functions of monitoring the readiness and effectiveness of components, aggregation of readiness indices and functional efficiency indicators (calculation of the corresponding integral indicators), adaptation to operating modes, external conditions and crew orders; c) configuration selection (arbitration) functions, consisting in determining the dominant configuration supervisor corresponding to the preferred configuration of equipment for performing the current task under the current conditions, as well as the preferred calculator for solving redundancy management problems; d) configuration management functions, including the formation of reconfiguration commands that control the input and output channels of switching devices, applications’ manager login, input and output channels of applications, configuration of application data processing procedures. Based on the proposed model, the key functions of configuration supervisors, their composition, structure, principles of organization and interaction, both between each other and with «external» subsystems, are determined. The role and place of the onboard integrated computing environment in redundancy management are determined, which consist of the implementation of the fourth group of control functions of the redundancy management system model.