A survey of aircraft engine health monitoring systems

Lean burn combustion monitoring strategy based on data modelling

“…As shown in Figure 1, the model of normality is trained by learning the function between the target thermocouple reading ( ) and the temperature values from the three thermocouples in opposite direction, together with shaft speed ( ), inlet temperature and pressure ( ), fuel flow ( ) and pilot/mains fuel split ratio ( ), (1) where T to T represent value from opposite thermocouples. Multiple regression models (one per thermocouple) are obtained by training with data collected under normal conditions, providing complete coverage of temperature profile prediction around annulus.…”

“…Aircraft equipment health management (EHM), especially the practices of gas turbine engine monitoring have evolved in form and complexity for several decades [1]- [3]. The EHM techniques, which are responsible for assessing and tracking the asset's state of health, have significantly reduced costs by preventing or delaying maintenance of large civil engines, as well as identifying potentially costly technical problems.…”

Sustainment of Commercial Aircraft Gas Turbine Engines: An Organizational and Cognitive Engineering Approach

“…However, as aptly suggested by Tumer and Bajwa (1999a), "a more specific goal is to develop a means to use engine monitoring systems to help with engine maintenance decisions". One main purpose of this thesis is to offer recommendations on how to achieve this very goal.…”

“…The latest research initiatives in engine DPCM methods have been surveyed by Tumer and Bajwa (1999a) and Li (2002). There has been a great deal of effort in developing algorithms for more accurate, robust and faster engine condition monitoring and diagnostics.…”

Structural Health Monitoring Using Index Based Reasoning For Unmanned Aerial Vehicles

“…In this approach, the structural model of the system is developed based on the understanding of the system, and the effect of damage may find an expression in the model (Fritzen 2005). When it is applied for SHM, the measured state of structural integrity will be compared with the estimation of the state by the model, and the discrepancy may indicate the occurrence of damages and provide a measure to isolate damages (Tumer and Bajwa 1999). Poll and Iverson (2003) created compositional models of the main shut-off valve of Hybrid Combustion Facility (HCF), POV-4, including both the physical structure and the operational behavior of the system.…”