Patent ID: 9581124
Date: 2017-02-28
CPC Classifications: B64D,F02N,F05D,G05B,G07C

Claim:
1. A method for detecting performance of an Airborn Auxiliary Power Unit (APU) starter, comprising: rotating the APU with a starter system; obtaining APU-related messages at multiple time points within one time period; obtaining running parameters of the APU starter according to the messages, the running parameters comprise starting times (STAs); calculating average value AVG and deviation index δ of the STAs within said time period; determining whether performance of the APU starter is in a stable phase, decline phase, or failure phase according to the deviation index δ, the determining comprising: determining the deviation index δ when the APU starter is in a stable phase, wherein, the decline threshold value is about 1.5 to 2.0 times of the stable deviation index δ, and failure threshold value is about 2 to 3 times of the stable deviation index δ.