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Invariant Approach in Monitoring Condition of Onboard Radio Electronic Equipment

The problem of designing reliable on-board radio electronic equipment is a priority for the development of aerospace instrumentation in Russia. The search for new concepts of the design of on-board equipment architectures is aimed at satisfying the requirements of modularity, regularity, uniformity, multi functionality, fault tolerance and reconfigurability on the basis of integrated structures of standard hardware-software modules. As a rule, through the organization of parallel design together with the equipment a tool for functional monitoring of its condition is created. The implementation of a diagnostic monitoring of the on-board equipment condition without a reference standard by means of an invariant approach is proposed in this paper. The essence of this approach is to identify characteristics, which remain unchanged with the equipment normal functioning and change when defects appear in its operation. The monitoring of the onboard equipment condition is carried out by reconfiguring its architecture for the observation time. The on-board equipment configuration change consists in its division into duplicated pairs of homogeneous subsystems, blocks or standard modules. The state monitoring is made by a comparative analysis of the subsystems characteristics in the formed pairs. The diagnostic procedure is performed only for those pairs that have mismatched states. The addresses of the found systems with deviations are identified by the subsequent reconfiguration of the on-board equipment.