Component Monitoring to Manage the Redundancy of an Onboard Equipment Complex

Abstract. This paper considers the technical condition monitoring problem for the components of an onboard equipment complex to perform its real-time reconfiguration. The idea is to use at least three levels of monitoring systems: the nearest perspective, only traditional built-in control (BiC) to detect faults; the next level, BiC together with auxiliary means to increase the fidelity of technical diagnosis, including mutual cross-pair monitoring; the distant perspective, logical processing algorithms for system observations as a whole based on the normalized rules of failure mode and effects analysis (FMEA) of aircraft equipment. Mathematically, the pair monitoring of component conditions consists in forming the so-called preference matrices; their values and special tables are used to determine the condition of diagnosed objects with high reliability and, moreover, to evaluate possible errors of diagnostic tools. For third-level methods, an action sequence is proposed as follows: the reverse and direct logical models reproducing the dependencies of faulty states based on FMEA results are alternatively initiated. An updated methodology for handling triplex logical models is proposed. The main advantages of logical models––significant simplicity and universality––ensure their effectiveness in a wide range of dynamic systems of varying complexity. A methodological example illustrates the application of logical triplex models.

Keywords: onboard equipment complex, technical monitoring, logical pair monitoring, logical triplex models, analysis of functional failures, redundancy management.