US2014178175A1PendingUtilityA1

Air turbine starter monitor system

33
Assignee: UNITED TECHNOLOGIES CORPPriority: Dec 21, 2012Filed: Dec 21, 2012Published: Jun 26, 2014
Est. expiryDec 21, 2032(~6.4 yrs left)· nominal 20-yr term from priority
Inventors:Dean W. KalkovichFrank E. BullisBobby L. Allen
F02C 7/277F05D 2270/304F05D 2260/80F04D 15/0094
33
PatentIndex Score
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References
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Claims

Abstract

A method of monitoring a rotational system includes identifying a non-nominal spool-down profile.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method of monitoring a rotational system comprising:
 identifying a non-nominal spool-down profile.   
     
     
         2 . The method as recited in  claim 1 , further comprising: providing an alert upon identification of the non-nominal spool-down profile. 
     
     
         3 . The method as recited in  claim 2 , further comprising: providing the alert to a Health and Usage Monitoring System (HUMS). 
     
     
         4 . The method as recited in  claim 2 , further comprising: providing the alert to an on-board system. 
     
     
         5 . The method as recited in  claim 1 , further comprising: defining the non-nominal spool-down profile to be outside a tolerance band. 
     
     
         6 . The method as recited in  claim 5 , wherein said tolerance band is determined from a multiple of recent spool-down profiles. 
     
     
         7 . The method as recited in  claim 5 , wherein said tolerance band is predetermined. 
     
     
         8 . The method as recited in  claim 1 , further comprising: defining the non-nominal spool-down profile to be within a peak speed and a drop-off speed. 
     
     
         9 . The method as recited in  claim 1 , further comprising: comparing a nominal spool-down profile to a recent spool-down profile. 
     
     
         10 . The method as recited in  claim 9 , wherein the recent spool-down profile is the most recent spool-down profile. 
     
     
         11 . A method of monitoring an Air Turbine Starter (ATS) comprising:
 comparing a nominal spool-down profile to a recent spool-down profile; and   identifying a non-nominal spool-down profile from the comparing.   
     
     
         12 . The method as recited in  claim 11 , further comprising: defining the nominal spool-down profile to be within a peak speed and a drop-off speed. 
     
     
         13 . The method as recited in  claim 12 , further comprising: defining the nominal spool-down profile to be within a tolerance band. 
     
     
         14 . The method as recited in  claim 13 , wherein said tolerance band is determined from a multiple of recent spool-down profiles. 
     
     
         15 . The method as recited in  claim 13 , wherein said tolerance band is predetermined. 
     
     
         16 . The method as recited in  claim 11 , wherein the recent spool-down profile is the most recent spool-down profile. 
     
     
         17 . A system comprising:
 a rotational system with a spool-down profile; and   a controller in communication with said rotational system, said controller operable to identifying a non-nominal spool-down profile   
     
     
         18 . The system as recited in  claim 16 , wherein said rotational system is an Air Turbine Starter (ATS). 
     
     
         19 . The system as recited in  claim 16 , wherein said controller operable to compare a nominal spool-down profile to a recent spool-down profile. 
     
     
         20 . The system as recited in  claim 16 , wherein said recent spool-down profile is a latest spool-down profile.

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