EP0843244A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Diagnostic trend analysis for aircraft engines
Assignee: General Electric Co
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Filing: 1997-11-14
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Granted: —
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Expires: 2017-11-14
Abstract
Abstract A diagnostic trend analysis method (10) is used to analyze engine trend data for aircraft engines. Appropriate trend parameters are calculated from raw trend data (12) and wild points associated with the calculated trend parameters are eliminated (14). Abnormal shifts and changes are detected (16) at the most recent point for each trend parameter. The abnormal shifts and changes in each trend parameter are then evaluated (18). The evaluation is used to filter out spurious symptoms and provide accurate maintenance recommendations for real engine trend shifts (18).
Inventors
- 👤 Lee Roy La Pierre
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 13:06
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0218; G05B23/0224; G05B23/0227; G05B23/0232; G05B23/0259; G05B23/0275; G05B23/0278
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
A diagnostic trend analysis method (10) for analyzing
engine trend data for aircraft engines, the method
comprising the steps of: calculating appropriate trend parameters from
raw trend data (12); eliminating wild points (14) associated with
the calculated trend parameters (12); detecting abnormal shifts and changes at a most
recent point for each trend parameter (16); evaluating the abnormal shifts and changes in
each trend parameter (18); and using the evaluation to filter out spurious
data and provide accurate maintenance recommendations for
real engine trend shifts (18).
Claim 2
Dependent Claim
25 words
A diagnostic trend analysis method (10) as claimed in
claim 1 further comprising the step of calculating
corrected parameters to determine actual trend parameters
(20).
Claim 3
Dependent Claim
27 words
A diagnostic trend analysis method (10) as claimed in
claim 1 further comprising the step of generating a fault
template indicative of abnormal shifts corresponding
maintenance recommendations.
Claim 4
Dependent Claim
41 words
A diagnostic trend analysis method (10) as claimed in
claim 3 further comprising the step of comparing a set of
actual trend symptoms (20) to the fault template to
identify a possible cause for each of the actual trend
symptoms (20).
Claim 5
Dependent Claim
31 words
A diagnostic trend analysis method (10) as claimed in
claim 4 further comprising the step of evaluating the
match between the set of actual trend symptoms (20) and
the fault template.
Claim 6
Dependent Claim
40 words
A diagnostic trend analysis method (10) as claimed in
claim 5 wherein the step of evaluating the match further
comprises the step of scoring proximity of actual trend
parameter (20) shifts to each set of shifts in the fault
template.
Claim 7
Dependent Claim
50 words
A diagnostic trend analysis method (10) as claimed in
claim 1 wherein the step of detecting abnormal shifts and
changes at a most recent point for each trend parameter
(16) further comprises the step of differentiating
between a real change in engine performance and a faulty
measurement or data scatter.
References Cited (Backward Citations)
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