Integrating Lead Innovative Technologies Impact Technologies’ Physics-Based Prognostics with DSI...
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Integrating Lead Innovative Technologies Impact Technologies’ Physics-Based Prognostics with DSI International’s Systems Diagnostics DSI developed a detailed model of the fuel control assembly for an airplane Detailed Diagnostics tests for fault isolation were developed Prognostics were added for the fuel transfer pump Prognostics uses P, fuel flow rate and Cmd inputs to assess pump degradation
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Transcript of Integrating Lead Innovative Technologies Impact Technologies’ Physics-Based Prognostics with DSI...
Integrating Lead Innovative Technologies
Impact Technologies’ Physics-Based Prognostics with DSI International’s Systems Diagnostics
DSI developed a detailed model of the fuel control assembly for an airplane
Detailed Diagnostics tests for fault isolation were developed
Prognostics were added for the fuel transfer pump
Prognostics uses P, fuel flow rate and Cmd inputs to assess pump degradation
Fuel Control Assembly Model
Hea
d
Flow Rate
Best Eff. Point (BEP)
NPSHR
NPSHA
Ideal
Degradation Effects
Pump Prognostics Explained
Assaad Krichene
Fuzzy Membership functions account for statistical variability. Green for nominal operation, yellow and red for different levels of degradation
Assaad Krichene
NPSHA: Net Positive Suction Head AvailableNPSHR: Net Positive Suction Head Required
Prognostics “Added Value”
Isolation in just one “test” Set of anticipated diagnostics tests to fail Can provide an anticipated time to failure
with confidence bounds based on future operating profile
May be used to change diagnostics tests order to isolate faults more efficiently i.e. with fewer tests
May provide updates to reliability curves (updated MTBF) for simulations
![NASA Prognostics[1]](https://static.fdocuments.net/doc/165x107/547f2aaab4af9fa5158b5833/nasa-prognostics1.jpg)
