ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Power-on self-test of electro-mechanical actuation system for aircraft electric braking
Received date: 2016-05-06
Revised date: 2016-07-18
Online published: 2016-07-22
In this paper, a power-on self-test (POST) scheme for the electro-mechanical actuation (EMA) system for aircraft electric braking is proposed to ensure that the motor drive system is in healthy condition. With self-test, fault components can be found, located and exchanged accurately and timely to ensure the flight rate of aircraft. With the proposed scheme, vulnerable components can be tested and faulty parts can be located with minimum times, then the secondary damage can then be avoided. For the drive-loop consisted of inverter and motor three-phase windings, a power-on self-test scheme is put forward and analyzed. In the testing process, the dc-link capacitor, controlled by a MOSFET, is charged to store energy and discharged to generate current for test. Meanwhile, the faults are identified by detecting the maximum value of the current. With the proposed scheme, BLDC motor can run safely by comprehensively diagnosing open-circuit faults and short-circuit faults of inverter and three-phase windings in advance. Compared with the traditional schemes, no more sensors or detection circuits is added. The POST scheme for EMA system can realize comprehensive self-test within one second. False alarm rate and omission rate remain less than 1% in the experiment with and without faults. The scheme can also resist the complicated electromagnetic environment (EME) of the aircraft, and its performance is stable and reliable. With different fault thresholds, it can be migrated to other EMA system handily.
XIANGLI Kang , MA Ruiqing . Power-on self-test of electro-mechanical actuation system for aircraft electric braking[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(12) : 3832 -3842 . DOI: 10.7527/S1000-6893.2016.0216
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