Abstract The present invention relates to a method and device for monitoring performance of an auxiliary power unit (APU) turbine efficiency of an aircraft. The method comprises: obtaining APU messages at multiple time 5 points within a period; obtaining APU startup parameters including at least a rotation speed at a peak of EGT according to the APU messages; calculating a percentage NPA of the rotation speed when the exhausting gas temperature EGT reaches its peak at the APU startup stage relative to the rotation speed in the APU normal operation; calculating the average of the o NPA within the period; and determining which of the stable, decline and failure phases the APU turbine efficiency is in according to the average of the NPA. 300 200 100 2100 120 130 310 -- Figure 1
Method and apparatus for monitoring efficiency of aircraft auxiliary power unit
2017-12-21
Patent
Elektronische Ressource
Englisch
METHOD AND APPARATUS FOR MONITORING TURBINE EFFICIENCY OF AIRCRAFT AUXILIARY POWER UNIT
Europäisches Patentamt | 2019
|METHOD AND APPARATUS FOR MONITORING TURBINE EFFICIENCY OF AIRCRAFT AUXILIARY POWER UNIT
Europäisches Patentamt | 2019