Mathematical model and simulation of selected components of the EPS of the aircraft, providing the operation of on-board electrical equipment and systems in accordance with MEA/AEA concept

The subject of this paper is to make an analysis of advanced autonomous power systems (EPS, PES). This in particular includes to simulate the operation of a model of the Auxiliary Power Unit (APU) in the field of the power supply system EPS (Electric Power System). It ensures the proper operation of basic equipment and systems powered by electricity on board of a modern aircraft compatible with the More Electric Aircraft (MEA) concept. The modern onboard Autonomous Electric Power System (ASE) includes two systems: PES (Power Electronics System) and the Electric Power System (EPS). They are equipped with additional sources in the form of an emergency air turbine RAT (Ram Air Turbine) as well as an auxiliary source of APU, which will be subject to detailed analysis in the presented paper (model, simulation). The above systems are among the most modern systems in the field of onboard power supply of modern aircraft. It concerns both civil aviation companies Boeing and Airbus (A-380 and A-350XWB, B-787), as well as military Lockheed Martin (F-22 Raptor) and JSF (Joint Strike Fighter) F-35. Based on the above, on the basis of analysis and simulation made, the selected component (e.g. APU), will be presented justification for the implementation of the More Electric Aircraft concept for modern aviation. In the final part the practical conclusions will be drawn.