Method of engine surge discrimination
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United States of America Patent
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N/A
Issued Date -
May 15, 2003
app pub date -
Jul 12, 2002
filing date -
Nov 15, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of discriminating between spurious and genuine surges in a gas turbine engine is disclosed which includes the steps of receiving an engine speed signal over a global engine surge investigation region having a plurality of temporal regions in which engine surge events can occur, identifying a specific temporal region in which an engine surge event occurs, incrementing a surge counter corresponding to the temporal region in which the engine surge event occurred by a magnitude of two, identifying the temporal regions in which no engine surge event occurred, decrementing a surge counter corresponding to each temporal region in which no engine surge event occurred by a magnitude of one; and enabling a surge avoidance flag when the magnitude of the surge counter has reached a predetermined value.
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