Application and Design of PHM in Aircraft’s Integrated Modular Mission System

a hierarchical PHM (Prognostic and Health Management) architecture divided into subsystem-level and system-level is proposed with its functions and interfaces at various levels to satisfy PHM requirements of the integrated modular mission system. At the subsystem level, integrated condition monitoring method is developed to monitor the operational conditions of various modules, data buses and functional applications according to their characteristics and requirements. At the system level, a MBR (Model-based Reasoning) engine and its diagnostic knowledge model are developed for the integrated PHM data processing, and a graphical PHM display-control interface and a PHM database are designed to display and store PHM data centrally. The overall design method is applied on a project of the scout's integrated modular mission system and a PHM subsystem is developed, which can provide integrated health condition monitoring and accurate fault diagnosis for the mission system, as well as the real-time and comprehensive health information for pilot and maintenance personnel.