TY - GEN
T1 - Fault signal analysis for aircraft generator rectifier
AU - Tang, Xiaojun
AU - Fan, Dasen
AU - Liu, Liang
AU - Liu, Zhenbao
AU - Zhang, Chao
AU - Bu, Shuhui
PY - 2014
Y1 - 2014
N2 - Integrated drive generator (IDG) connected with the main shaft of aircraft engine is the key power source for many electronic systems such as flight management computers, control and navigation systems, supplying constant frequency AC electrical power to the aircraft. IDG is composed of constant speed drive with differential assembly, brushless synchronous exciter generator, rectifier, brushless synchronous main generator, and generator control unit. The function of rectifier is to convert the alternating current from the exciter generator into a direct current, which will be applied to field winding of the main generator for producing three-phase voltage to aircraft electronic systems. According to report from previous research, diode failure in rectifier occurs with a high frequency. In this paper, we attempt to propose a solution for fast and accurately detecting faults from rectifier. We first analyze the noisy signals generated under different cases of diode faults by virtue of a simulated circuit model built in Matlab, and the fault signal is decomposed into finite intrinsic mode functions by empirical mode decomposition. Intrinsic mode functions are successively transformed by Hilbert transform to obtain the instantaneous frequency. Therefore, the fault transient signal can be analyzed by means of the instantaneous frequency and Hilbert marginal spectrum. The experimental results show that our method can be effectively applied to analyze the fault status of aircraft generator rectifier. Our work has potential to in real-time monitor safe and reliable operation of aircraft generators and further supervise the quality of aircraft power.
AB - Integrated drive generator (IDG) connected with the main shaft of aircraft engine is the key power source for many electronic systems such as flight management computers, control and navigation systems, supplying constant frequency AC electrical power to the aircraft. IDG is composed of constant speed drive with differential assembly, brushless synchronous exciter generator, rectifier, brushless synchronous main generator, and generator control unit. The function of rectifier is to convert the alternating current from the exciter generator into a direct current, which will be applied to field winding of the main generator for producing three-phase voltage to aircraft electronic systems. According to report from previous research, diode failure in rectifier occurs with a high frequency. In this paper, we attempt to propose a solution for fast and accurately detecting faults from rectifier. We first analyze the noisy signals generated under different cases of diode faults by virtue of a simulated circuit model built in Matlab, and the fault signal is decomposed into finite intrinsic mode functions by empirical mode decomposition. Intrinsic mode functions are successively transformed by Hilbert transform to obtain the instantaneous frequency. Therefore, the fault transient signal can be analyzed by means of the instantaneous frequency and Hilbert marginal spectrum. The experimental results show that our method can be effectively applied to analyze the fault status of aircraft generator rectifier. Our work has potential to in real-time monitor safe and reliable operation of aircraft generators and further supervise the quality of aircraft power.
KW - Integrated drive generator
KW - Intrinsic mode functions
KW - Rectifier fault
KW - Signal analysis
UR - http://www.scopus.com/inward/record.url?scp=84902439647&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-54236-7_62
DO - 10.1007/978-3-642-54236-7_62
M3 - 会议稿件
AN - SCOPUS:84902439647
SN - 9783642542350
T3 - Lecture Notes in Electrical Engineering
SP - 569
EP - 578
BT - Proceedings of the First Symposium on Aviation Maintenance and Management
PB - Springer Verlag
T2 - 2013 1st Symposium on Aviation Maintenance and Management
Y2 - 25 November 2013 through 28 November 2013
ER -