Research Of Aircraft IDG Fault Parameters Modeling Method

Constant speed constant frequency Integrated Drive Generator(IDG) is the core of main source of electrical power for the Civil Aviation transport aircraft. The failure rate of IDG remains high in long-term, due to factors such as the frequently changed load of the airborne electrical equipment and the flight height aircraft flying on, which even threaten the aviation security. Therefore, it is necessary to detect the failure of aircraft IDG accurately and quickly so as to conduct deep maintenance for aircraft generator.After studying electrical failure mechanism of aircraft IDG, it is found that the common point of the early signs of these failures is that the parameters of the overall system are changed before failures occur. These changes will be reflected in the mathematical model of the aircraft’s overall drive generators ultimately. The Simulation of aircraft generator’s normal and fault operating condition, acquainting waveforms of related condition, the analysis between fault parameters and fault internal relationship all by implementing the mathematical model of generator.The fault parameter modeling method for aircraft IDG is studied in this paper. Firstly, the conclusion that the essential reason for electrical failure of aircraft IDG is the change of structure parameters of the overall system is declared by studying the system failure mechanism of aircraft IDG. Secondly, the establishment of aircraft generator’s mathematical model gives an accurate description of the generator system failure runtime with imbalance operation. At last, simulating the generators trouble-free and fault condition and capturing waveforms corresponding with it, by implementing generator off-line models created in MATLAB/Simulink with setting fault parameters artificial.