Modeling and simulation of a hybrid electrohydraulic flight control servomechanism for A380

The paper is devoted to the dynamic behavior of a new generation of electrohydraulic servosystem which trends to replace the classical electrohydraulic ones, based on the hydraulic servovalves. A real application case of this new concept is studied using the data supplied by the aerodynamics laboratories. This application was widely tested on A340...A380 civil airplanes, after many years of full test in the “Iron Bird” Laboratory from Toulouse. The simulations performed by AMESIM reveal the importance of the brushless motors dynamics, and the pump volumetric efficiency.