Combined Method of Technical Analysis to Optimize the Aviation Electromechanical Systems Reliability Indicators

The paper discusses a combined method of analysis the reliability indicators based on functional-cost analysis and failure modes and effects analysis, used to optimize the aviation electromechanical systems reliability indicators. Approaches to provide failure modes and effects analysis and functional-cost analysis of aviation electromechanical systems components, taking into account the implementing cost of each function, and their implementation results examples are shown. The proposed method description, its main parameters, as well as its approbation on the example of the developed aircraft fuel pump electromechanical drive: the control unit and the electric motor are given. A failure cost level index is proposed. It allows to estimate the cost of inputs of eliminating a functional failure, taking into account its occurrence probability. The reliability and cost characteristics of developed electromechanical drive are calculated. The components with the highest failure cost level index are identified, and recommendations are given on possible ways to improve the reliability of these components.