Abstract
A framework for integrated diagnostic reasoning to detect and isolate faults in complex aircraft systems, at the vehicle level, is proposed. A Digital Twin emulating the functions of an aircraft’s selected subsystems is to be developed; this will include their input/output parameters connecting to other systems, for simulating the subsystem level interactions. The failure propagation across subsystems will be observed by injecting different faults. A diagnostic module for each subsystem will detect and isolate faults. This will be complemented by an integrated reasoner at the vehicle level which will isolate the root cause of propagated faults. On successful completion, the fully developed integrated reasoner shall distinguish an effect (for example, engine power reduction in B777 (Sleight and Carter, 2014)) from its root cause (blocked Fuel Oil Heat Exchanger (Sleight and Carter, 2014)), yielding maintenance savings and increasing dispatch reliability.
Highlights
An aircraft is a complex machine comprising several multi-physical systems interacting with each other at various levels for its safe and efficient operation
A diagnostic reasoner, one of Integrated Vehicle Health Management (IVHM)’s components, can take advantage of the connections between the subsystems to monitor their health at the vehicle level
This research aims to showcase the potential of a reasoning system at the vehicle level by deploying an integrated diagnostic reasoner over a digital twin emulating the subsystems of an aircraft, to isolate the single electrical and mechanical faults which have propagated between the subsystems
Summary
An aircraft is a complex machine comprising several multi-physical systems interacting with each other at various levels for its safe and efficient operation Due to these interactions, it is possible for faults to propagate from one system to another. A diagnostic reasoner, one of IVHM’s components, can take advantage of the connections between the subsystems to monitor their health at the vehicle level This can save significant time and cost involved in Maintenance, Repair and Overhaul (MRO) and increase the dispatch reliability. With this context, this research aims to showcase the potential of a reasoning system at the vehicle level by deploying an integrated diagnostic reasoner over a digital twin emulating the subsystems of an aircraft, to isolate the single electrical and mechanical faults which have propagated between the subsystems
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