Patent ID: 9657649
Date: 2017-05-23
CPC Classifications: F02C,F05D,G01M,G05B,Y02T

Claim:
1. A method for detecting performance of an Airborne Auxiliary Power Unit (APU) fuel assembly of an aircraft, comprising: obtaining APU messages at multiple time points within a time period; obtaining running parameters of the APU fuel assembly according to the APU messages, the running parameters at least comprising starting times STAs within said time period; calculating average value AVG and deviation index δ of the starting times STAs within said time period; and determining whether performance of the APU fuel assembly is in a stable phase, a decline phase or a failure phase according to the deviation index δ, the determining comprising: determining a stable deviation index δ when the APU fuel assembly is in the stable phase; wherein, the decline threshold value is about 2 times of the stable deviation index in the stable phase, and the failure threshold value is about 3-4 times of the stable deviation index.