Design and Simulation of Electrical Emergency System in Aircraft using Ram Air Turbine

This paper presents a modelling and simulation of a Ram Air Turbine (RAT) system used as emergency power supplier in an aircraft. All electrical and mechanical components are modelled precisely with the aid of MATLAB/Simulink. The main objective of this paper is presenting different physical domains that gives an overview of basic interactions between electrical and mechanical components. The aircraft power system consists of a wind turbine connected to an electrical synchronous generator which already have used in supplying power to the aircraft. The shaft of the turbine is also connected to a pump that supplies a hydraulic circuit linked through a servo valve to a cylinder. The motion of the rod is transformed into rotational movement on the axis of the Aileron. A position controller is used so that the deflection angle tracks a given reference by controlling the servo valve. The simulations of different positions of aileron have been presented to show the response of controlled signal and compare between different controllers.