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http://dx.doi.org/10.5762/KAIS.2017.18.3.640

A study on the improvement of Auxiliary Power Unit auto-shutdown of T-50 series aircraft based on analysis of ECU response characteristics  

Park, Sung-Jae (Defence Agency for Technology and Quality)
Yoo, In-Je (Defence Agency for Technology and Quality)
Choi, Su-Jin (Defence Agency for Technology and Quality)
Lee, Dong-Ki (Korea Aerospace Industries, LTD.)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.3, 2017 , pp. 640-646 More about this Journal
Abstract
A GEN TEST of the auxiliary power unit of a T-50 series aircraft is performed as part of the operational test of its emergency power system on the ground before flight. At this time, the auxiliary power unit should be automatically turned off via the response signal of the ECU when power is not normally supplied to the emergency power system. If the correct operation of the emergency power system cannot be confirmed on the ground, it is not possible to proceed with the flight. This kind of defect is a major factor causing the operation rate of the aircraft to be decreased. The defect code identified by the ECU was confirmed as a defect in the inverter. However, the same defect was found after replacing the inverter. This report presents an improved method of identifying the cause of the defect by analyzing the response characteristics of the ECU and emergency power system and allows the ECU to be recognized as the cause of the defect if the inverter does not generate a voltage within a certain time. Also, the application of the improved method confirmed that it can satisfy the output request time of the emergency power system and effectively prevent the auto-shutdown of the auxiliary power unit.
Keywords
Auxiliary Power System; Auxiliary Power Unit; Auto-Shutdown; Electronic Control Unit; Emergency Power System; Inverter;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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