Abstract
The Electrical Power System (EPS) in an aircraft is designed to interact extensively with other systems. With a growing trend towards more electric aircraft, the complexity of interactions between the EPS and other systems has grown. This has resulted in an increased necessity of implementing health monitoring methods like diagnosis and prognosis of the EPS at the systems level. This paper focuses on developing a diagnostic algorithm for the EPS to detect and isolate faults and their root causes that occur at the Line Replaceable Units (LRUs) connecting with aircraft systems like the engine and the fuel system. This paper aims to achieve this in two steps: (i) developing an EPS digital twin and presenting the simulation results for both healthy and fault scenarios, (ii) developing an Adaptive Neuro-Fuzzy Inference System (ANFIS) monitor to detect faults in the EPS. The results from the ANFIS monitor are processed in two methods: (i) a crisp boundary approach, and (ii) a fuzzy boundary approach. The former approach has a poor misclassification rate; hence the latter method is chosen to combine with causal reasoning for isolating root causes of these interacting faults. The results from both these methods are presented through examples in this paper.
Highlights
The Electrical Power System (EPS) of an aircraft is generally designed to have many interactions with other aircraft systems
This paper discussed the importance of developing diagnostics for an Electrical Power System to isolate faults, including those that affect other systems like the engine, the fuel system, and the to isolate faults, including those that affect other systems like the engine, the fuel system, and the Control System of an aircraft
Isolation of faults to particular Line Replaceable Units (LRUs) is attempted by processing the Adaptive Neuro-Fuzzy Inference System (ANFIS) ranks in two methods: (i) a crisp boundary approach, and (ii) a fuzzy boundary approach
Summary
The Electrical Power System (EPS) of an aircraft is generally designed to have many interactions with other aircraft systems. The EPS provides electricity required for various valves in the aircraft like the fuel system, the Environmental Control System (ECS), and the pneumatic systems [1]. It is the conduit source of power for the avionics and provides power for all the instruments in the cockpit. The EPS is required for cabin lighting, as well as for the functioning of electrical and electronic appliances like cabin entertainment systems and sensors [2]. With the aircraft industry moving towards low CO2 emissions, clean energy, and light weight, more focus is being given to the concepts of fully electric propulsion systems and all-electric aircraft
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