Aircraft AC Generators_Hybrid System Mdodeling and Simulation英文版本.pdf

1 Aircraft AC Generators: Hybrid System Modeling and Simulation Ashraf Tantawy, Student Member, IEEE, Xenofon Koutsoukos, Senior Member, IEEE, and Gautam Biswas, Senior Member, IEEE Abstract—Integrated Drive Generators (IDGs) are the main The traditional way of analyzing switching circuits relies on source of electrical power for a number of critical systems in averaging or discretization techniques to make analysis of the aircraft. Fast and accurate fault detection and isolation is a circuit more tractable [15]. In this paper, we employ hybrid necessary component for safe and reliable operation of the IDG and the aircraft. IDGs are complex systems, and a majority of modeling [2], which combines the use of discrete and continu- the existing fault detection and isolation techniques are based on ous behaviors to develop a hybrid model for the brushless AC signal analysis and heuristic methods derived from experience. generator that accurately captures the system dynamics. The Model-based fault diagnosis techniques are hypothesized to be model is used to simulate the machine behavior under both more general and powerful in designing detection and isolation normal and faulty conditions. We explicitly model the exciter schemes, but building sufficiently accurate models of complex IDGs is a difficult task. dq0 models have been developed for and main generators using the phase-domain representation, design and control of generators, but these